Entry - *133530 - ERCC EXCISION REPAIR 5, ENDONUCLEASE; ERCC5 - OMIM
* 133530

ERCC EXCISION REPAIR 5, ENDONUCLEASE; ERCC5


Alternative titles; symbols

EXCISION REPAIR, COMPLEMENTING DEFECTIVE, IN CHINESE HAMSTER, 5
ERCM2
UV DAMAGE, EXCISION REPAIR OF, UV-135; UVDR
RAD2, YEAST, HOMOLOG OF
XERODERMA PIGMENTOSUM, GROUP G CORRECTING PROTEIN; XPGC
XPG GENE; XPG


HGNC Approved Gene Symbol: ERCC5

Cytogenetic location: 13q33.1     Genomic coordinates (GRCh38): 13:102,846,032-102,875,995 (from NCBI)


Gene-Phenotype Relationships
Location Phenotype Phenotype
MIM number
Inheritance Phenotype
mapping key
13q33.1 Cerebrooculofacioskeletal syndrome 3 616570 AR 3
Xeroderma pigmentosum, group G 278780 AR 3
Xeroderma pigmentosum, group G/Cockayne syndrome 278780 AR 3

TEXT

Description

The human genes correcting DNA repair defects are termed excision repair cross-complementing, or ERCC, genes. A number appended to the symbol refers to the rodent complementary group that is corrected by the human gene. The ERCC5 gene corrects the excision repair deficiency of Chinese hamster ovary cell line UV135 of complementation group 5. The human ERCC5 gene product is a structure-specific endonuclease required for making the 3-prime incision during DNA nucleotide excision repair (NER). See also ERCC1 (126380), ERCC2 (126340), ERCC3 (133510), ERCC4 (133520), and ERCC6 (609413).


Cloning and Expression

Mudgett and MacInnes (1990) isolated the complete human ERCC5 gene on overlapping cosmids. The functional gene was found to be 32 kb long.

MacInnes et al. (1993) isolated clones corresponding to the ERCC5 gene from human cDNA libraries. The deduced 1,186-residue protein has a molecular mass of 133 kD and shows sequence and structural similarity to yeast RAD2, which is involved in the nucleotide excision repair pathway. The human mRNA was 4.6 kb. Further analysis suggested that the protein is nuclear-located with highly conserved helix-loop-helix segments. Shiomi et al. (1994) isolated clones corresponding to both the mouse and human ERCC5 genes and confirmed that XPG and ERCC5 are identical.

Emmert et al. (2001) identified 6 alternatively spliced isoforms of the XPG gene.

Scherly et al. (1993) isolated frog and human cDNAs encoding proteins resembling RAD2. Alignment of these 3 polypeptides, together with 2 other RAD2-related proteins, demonstrated that their conserved sequences are largely confined to 2 regions. Expression of the human cDNA in vivo restored to normal the sensitivity to ultraviolet light and unscheduled DNA synthesis of lymphoblastoid cells from XP group G (278780), but not those from Cockayne syndrome group A (CSA; 216400). The XPG-complementing protein (XPGC) was generated from an mRNA of approximately 4 kb that was present in normal amounts in the XPG cell line.

O'Donovan et al. (1994) reported the isolation of full-length XPG as a soluble protein expressed from a recombinant baculovirus. The purified polypeptide corrected the DNA nucleotide excision repair defect of XPG cell extracts in vitro and acted as a magnesium-dependent single-stranded DNA endonuclease.

Harada et al. (1995) demonstrated that the mouse Xpg cDNA has a single long open reading frame predicted to encode a 1,170-residue protein with a molecular mass of 130.8 kD. The Xpg gene expressed a single 4.3-kb mRNA transcript at similar levels in 5 mouse tissues examined.


Gene Structure

Emmert et al. (2001) determined that the human XPG gene contains 15 exons.


Mapping

Using somatic cell hybrids between a UV-sensitive mutant mouse cell line and normal human lymphocytes, Hori et al. (1983) found that a gene on human chromosome 13 was able to compensate for an autosomal recessive DNA excision repair defect in mouse cell line Q31. Siciliano et al. (1987) and Thompson et al. (1987) assigned ERCC5 to chromosome 13 by study of somatic cell hybrids between normal human cells and Chinese hamster cells defective in UV-induced nucleotide excision repair (UV135, complementation group 5). Study of hybrid cells containing rearranged human chromosomes indicated that the ERCC5 locus is situated in the region 13q14-q34.

Gersen et al. (1989) used somatic cell hybrids containing fragments of chromosome 13 to localize ERCC5 to human chromosome 13q22-qter. By fluorescence in situ hybridization, Warburton et al. (1991) mapped the ERCC5 gene to 13q32-qter but also found a strong hybridization signal at 10q11 where ERCC6 is located.

By fluorescence in situ hybridization, Takahashi et al. (1992) mapped the ERCC5 gene to 13q32.3-q33.1. By the same method, Samec et al. (1994) assigned the XPG gene to 13q33.

By in situ hybridization and by molecular linkage analysis, Harada et al. (1995) mapped the mouse Xpg gene 2.3 cM proximal to the microsatellite locus D1Mit18 on the R-positive B band of chromosome 1. The rat homolog was localized to chromosome 9q22.3, which had been known to have a conserved linkage homology to mouse chromosome 1. The assignment of human XPG to chromosome 13q32.3-q33.1 represents an area where no conserved linkage homology to mouse chromosome 1 had previously been found.


Gene Function

O'Donovan and Wood (1993) found that the DNA repair deficiency of XPG cell extracts could be corrected by addition of protein fractions from normal cells and by mixing XPG cell extracts with extracts from different repair-defective cell lines, except from cells representing ERCC5 rodent mutants. XPG and group 5 correcting activities co-eluted after approximately 1,000-fold purification from HeLa cells. An antibody directed against a fragment of the XPG protein inhibited excision repair by normal cell extracts, and activity could be restored with an XPG/group 5 complementing fraction. These data suggested that XPG and ERCC5 are identical proteins. O'Donovan et al. (1994) showed that the XPG endonuclease cleaves the damaged DNA strand 3-prime to the lesion during nucleotide excision repair.

Habraken et al. (1994) expressed the XPG-encoded protein in Sf9 insect cells and purified it to homogeneity. They demonstrated that XPG is a single-strand specific DNA endonuclease, thus identifying the catalytic role of the protein in nucleotide excision repair. They suggested that XPG nuclease acts on the single-stranded region created as a result of the combined action of the XPB helicase and XPD helicase at the DNA damage site.

TFIIH (see 189972) is a multisubunit transcription factor complex involved in nucleotide excision repair. In humans, mutations in the TFIIH subunits XPD (126340) and XPB (133510), the counterparts of the yeast RAD3 and RAD25 genes, respectively, cause Cockayne syndrome, which is characterized by severe growth defects, mental retardation, and cachexia. In yeast studies, Habraken et al. (1996) found that RAD2 forms a stable subassembly with TFIIH, which they designated nucleotide excision repair factor-3 (NEF3). Association with TFIIH provided a means of targeting RAD2 to the damaged site, where its endonuclease activity would mediate the 3-prime incision. Habraken et al. (1996) speculated that mutations in XPB, XPD, and XPG that result in Cockayne syndrome all impair TFIIH function in a similar manner by resulting in a deficiency in the rate of elongation of certain transcripts.

Volker et al. (2001) described the assembly of the NER complex in normal and repair-deficient (xeroderma pigmentosum) human cells by employing a novel technique of local ultraviolet irradiation combined with fluorescent antibody labeling. The damage-recognition complex XPC (613208)-HR23B (RAD23B; 600062) appeared to be essential for the recruitment of all subsequent NER factors in the preincision complex, including transcription repair factor TFIIH. Volker et al. (2001) found that XPA (611153) associated relatively late, was required for anchoring of subsequent subunits, and appeared to be essential for activation of the endonuclease activity of XPG. These findings identified XPC as the earliest known NER factor in the reaction mechanism and supported a concept of sequential assembly of repair proteins at the site of damage rather than a preassembled 'repairosome.'

Lee et al. (2002) provided evidence that S. cerevisiae Rad2 is involved in promoting efficient RNA polymerase II transcription. Inactivation of Rad26, the S. cerevisiae counterpart of the human ERCC6 gene, also caused a deficiency in transcription, and a synergistic decline in transcription occurred in the absence of both the Rad2 and Rad26 genes. Growth was also retarded in Rad2-deletion and Rad26-deletion single mutant strains, and a very severe growth inhibition was seen in Rad2-deletion/Rad26-deletion double mutants.

Sarker et al. (2005) found that XPG interacted with elongating RNA polymerase II in HeLa cells and bound stalled ternary complexes in vitro both independently and cooperatively with ERCC6. XPG bound transcription-sized DNA bubbles, through 2 domains not required for incision, stimulated ERCC6 binding to DNA bubbles and enhanced the ATPase activity of ERCC6. Bound RNA polymerase II blocked bubble incision by XPG, but an ATP hydrolysis-dependent process involving TFIIH created access to the junction, allowing incision. Sarker et al. (2005) concluded that coordinated recognition of stalled transcription by XPG and ERCC6 initiates transcription-coupled repair, and that TFIIH-dependent remodeling of stalled RNA polymerase II without release may be sufficient to allow repair.

Ito et al. (2007) found that XPG forms a stable complex with TFIIH and that the complex was able to repair damaged DNA in an in vitro assay of NER using cell extracts from XPB, XPD, or XPG cells. A mutation in the XPG gene that lacked the C terminus (133530.0003) and was unable to bind TFIIH resulted in a severe phenotype with XPG/Cockayne syndrome, whereas a missense mutation (133530.0002) that retained the C terminus region and had the ability to bind TFIIH resulted in a milder XPG phenotype. Mutations in the XPG gene that disrupted the C terminal and prevented the association with TFIIH also resulted in the disassociation of CAK (CCNH; 601953) and XPD from TFIIH. Further in vitro studies showed that XPG cells were deficient in ligand-induced transactivation of nuclear receptors due to hypophosphorylation resulting from the disintegration of TFIIH subunits. Ito et al. (2007) suggested that defective transactivation of nuclear receptors may account for some of the variable phenotypic features associated with XPG/Cockayne syndrome, such as growth failure and hypogonadism. The findings indicated that XPG plays a role in the stabilization of TFIIH and in the regulation of gene expression.


Molecular Genetics

Nouspikel and Clarkson (1994) found that 2 sibs with xeroderma pigmentosum complementation group G (XPG; 278780) were compound heterozygous for 2 point mutations in the ERCC5 gene (133530.0001; 133530.0002).

Lalle et al. (2002) found that the first 2 patients reported with XPG (Cheesbrough, 1978; Keijzer et al., 1979; Arlett et al., 1980) produced XPG protein with severely impaired endonuclease activity. Both patients were compound heterozygous for truncating mutations in the ERCC5 gene (133530.0009, 133530.0010) and another mutation (133530.0008 and 133530.0011, respectively). These cells, unlike those from xeroderma pigmentosum group G/Cockayne syndrome patients, were capable of limited transcription-coupled repair of oxidative lesions. Lalle et al. (2002) suggested that the residual ERCC5 activity in these patients was responsible for the absence of severe early-onset Cockayne syndrome symptoms.

Nouspikel et al. (1997) studied the nature of the molecular defect in the first 3 documented cases of combined XPG and Cockayne syndrome (see 278780) reported by Jaeken et al. (1989), Vermeulen et al. (1993), and Hamel et al. (1996). They found an unexpected common mutational pattern in the 3 patients with XPG/CS that was distinct from that found in 2 sibs with mild XPG without CS symptoms (Norris et al., 1987). Nouspikel et al. (1997) found that the 3 XPG/CS patients had mutations that were predicted to produce severely truncated XPG proteins. In contrast, 2 sib XPG patients without CS reported by Nouspikel and Clarkson (1994) were able to make full-length XPG, but had a mutation that inactivated its function in NER. The results suggested that XPG/CS mutations abolish interactions required for a second important XPG function and that it is the loss of this second function that leads to the CS clinical phenotype. (Note that Figure 6 of the report of Nouspikel et al. (1997) was retracted under a Voluntary Exclusion Agreement between one of the authors, Steven A. Leaden, and the U.S. Department of Health and Human Services. The other authors stated that the other findings and conclusions of the article were not challenged by retraction of Figure 6.)

Cleaver et al. (1999) reviewed mutations that had been described in the XPG gene.

Cerebrooculofacioskeletal Syndrome 3

In a boy, born of consanguineous Moroccan parents, with cerebrooculofacioskeletal syndrome-3 (COFS3; 616570) originally reported by Hamel et al. (1996), Nouspikel et al. (1997) identified a homozygous truncating mutation in the ERCC5 gene (133530.0003).

In 4 fetuses from a large consanguineous Pakistani kindred with COFS3, Drury et al. (2014) identified a homozygous truncating mutation in the ERCC5 gene (133530.0016) predicting the loss of the C terminus. The mutation, which was found by a combination of linkage analysis and exome sequencing, segregated with the disorder in the family. Functional studies of the variant were not performed.


Animal Model

Shiomi et al. (2004) created mice carrying mutations in the Xpg gene leading to C-terminal deletions in the protein. Mice homozygous for a mutation leading to deletion of the last 360 amino acids exhibited growth retardation and a shorter life span than controls, but they had a slightly milder CS phenotype than Xpg null mice. Mice homozygous for a mutation leading to deletion of the last 183 amino acids showed no growth abnormalities compared with wildtype mice.

Vermeij et al. (2016) reported that a dietary restriction of 30% tripled the median and maximal remaining lifespans of Ercc1 (126380) delta/- progeroid mice, strongly retarding numerous aspects of accelerated aging. Mice undergoing dietary restriction retained 50% more neurons and maintained full motor function far beyond the lifespan of mice fed ad libitum. Ercc5 -/- mice, another DNA repair-deficient progeroid mouse that models Cockayne syndrome (see 278780), responded similarly. The dietary restriction response in Ercc1 delta/- mice closely resembled the effects of dietary restriction in wildtype animals. Notably, liver tissue from Ercc1 delta/- mice fed ad libitum showed preferential extinction of the expression of long genes, a phenomenon also observed in several tissues aging normally. This is consistent with the accumulation of stochastic, transcription-blocking lesions that affect long genes more than short ones. Dietary restriction largely prevented this declining transcriptional output and reduced the number of gamma-H2AX (601772) DNA damage foci, indicating that dietary restriction preserves genome function by alleviating DNA damage. Vermeij et al. (2016) concluded that their findings established the Ercc1 delta/- mouse as a powerful model organism for health-sustaining interventions, revealed potential for reducing endogenous DNA damage, facilitated a better understanding of the molecular mechanism of dietary restriction, and suggested a role for counterintuitive dietary restriction-like therapy for human progeroid genome instability syndromes and possibly neurodegeneration in general.


Nomenclature

Lehmann et al. (1994) recommended that the final C in the XPGC symbol be omitted and the gene cited as XPG. Furthermore, they recommended that when an inactivating mutation in the ERCC5 gene is identified in an XPG patient, XPG should be used as the gene symbol.


History

Cooper et al. (1997) reported that oxidative damage, including thymine glycols, is removed by transcription-coupled repair in cells from normal individuals and from patients with xeroderma pigmentosum of complementation groups A (XPA; 278700), F (XPF; 278760), and G who have NER defects, but not from XPG patients who have severe Cockayne syndrome. Cooper et al. (2005) retracted the paper of Cooper et al. (1997), stating that the results were not valid as reported and that the overall integrity of the paper could not be supported by the presented results.


ALLELIC VARIANTS ( 16 Selected Examples):

.0001 XERODERMA PIGMENTOSUM, COMPLEMENTATION GROUP G

ERCC5, GLU960TER
  
RCV000018034...

In lymphoblastoid cell lines derived from 2 sibs with xeroderma pigmentosum complementation group G (XPG; 278780), Nouspikel and Clarkson (1994) identified compound heterozygosity for 2 mutations in the ERCC5 gene: a 3075G-T transversion resulting in a glu960-to-ter (Q960X) substitution and a truncated protein of 959 amino acids, and A792V (133530.0002). In vitro functional expression studies showed that neither mutant protein was able to correct UV sensitivity.


.0002 XERODERMA PIGMENTOSUM, COMPLEMENTATION GROUP G

ERCC5, ALA792VAL
  
RCV000018035

In 2 sibs with xeroderma pigmentosum complementation group G (XPG; 278780), Nouspikel and Clarkson (1994) identified a 2572C-T transition in the ERCC5 gene, resulting in an ala792-to-val (A792V) substitution. The mutation was found in compound heterozygosity with Q960X (133530.0001). In vitro functional expression studies showed that neither mutant protein was able to correct UV sensitivity.

Ito et al. (2007) found that the A792V mutant protein, which contains an intact C terminus, was able to bind TFIIH in a manner similar to that of wildtype ERCC5, likely resulting in the milder phenotype.


.0003 CEREBROOCULOFACIOSKELETAL SYNDROME 3

ERCC5, 1-BP DEL, 2972T
  
RCV000018036

In a patient with cerebrooculofacioskeletal syndrome-3 (COFS3; 616570) manifest as severe early-onset XPG/Cockayne syndrome reported by Hamel et al. (1996), Nouspikel et al. (1997) identified a homozygous 1-bp deletion (2972delT) in the ERCC5 gene, resulting in a frameshift after amino acid 925; another 55 amino acids unrelated to XPG would be added before the next in-frame stop codon. The child was born of first-cousin Moroccan parents and died at age 7 months.

Graham et al. (2001) referred to the case reported by Hamel et al. (1996) as one of COFS syndrome. The patient showed prenatal-onset growth deficiency, severe microcephaly, microphthalmia without cataracts, cleft palate, cutaneous photosensitivity, and brain atrophy without calcifications. Skin fibroblasts showed extreme cellular sensitivity to UV, comparable to that in classic xeroderma pigmentosum. Using in vitro studies, Ito et al. (2007) found that the mutant 2972delT protein, which lacked the C terminus, was unable to bind the TFIIH complex, likely resulting in the more severe phenotype.


.0004 XERODERMA PIGMENTOSUM GROUP G/COCKAYNE SYNDROME

ERCC5, 1-BP DEL, 2170A
  
RCV002266207...

In a Flemish girl with XPG/Cockayne syndrome (see 278780), Nouspikel et al. (1997) identified a homozygous 1-bp deletion within an AAA triplet at nucleotides 2170-2172, which resulted in a TGA stop codon after amino acid 659. Such a deletion was considered characteristic of a slippage error during DNA replication. The patient had psychomotor retardation, microcephaly, and was severely sunlight-sensitive with several pigmented cutaneous spots (Jaeken et al., 1989; Vermeulen et al., 1993). She died at 6.5 years of age.


.0005 XERODERMA PIGMENTOSUM GROUP G/COCKAYNE SYNDROME

ERCC5, ARG263TER
  
RCV000018038

In fibroblasts derived from a Flemish male with XPG/Cockayne syndrome (see 278780) Nouspikel et al. (1997) identified compound heterozygosity for 2 mutations in the ERCC5 gene: a 984C-T transition resulting in an arg263-to-ter (R263X) substitution and a severely truncated protein, and a 1-bp deletion (113530.0004) that had been identified in an unrelated Flemish girl. The 984C-T transition was located within a CpG dinucleotide and thus may have resulted from deamination of a 5-methylcytosine. The patient had extreme microcephaly, dysmorphism, and sun-sensitive skin with several pigmented spots. He died at age 20 months. The 2 patients were not known to be related, but possessed a very rare HLA haplotype in common.


.0006 XERODERMA PIGMENTOSUM GROUP G/COCKAYNE SYNDROME

ERCC5, GLN176TER
  
RCV000018039

In a patient with xeroderma pigmentosum complementation group G and neurologic involvement with features of Cockayne syndrome (see 278780) in infancy, Zafeiriou et al. (2001) identified compound heterozygosity for 2 mutations in the ERCC5 gene: a 526C-T transition resulting in a gln176-to-ter (Q176X) substitution, and P72H (133530.0007). Only a minor fraction of ERCC5 mRNA was encoded by the Q176X allele.


.0007 XERODERMA PIGMENTOSUM GROUP G/COCKAYNE SYNDROME

ERCC5, PRO72HIS
  
RCV000018040

In a patient with XPG/Cockayne syndrome (see 278780), Zafeiriou et al. (2001) identified a 215C-A transversion in the ERCC5 gene, resulting in a pro72-to-his (P72H) substitution. This mutation was found in compound heterozygosity with Q176X (133530.0006). The P72H substitution was expected to seriously impair the 3-prime endonuclease function of XPG.


.0008 XERODERMA PIGMENTOSUM, COMPLEMENTATION GROUP G

ERCC5, LEU858PRO
  
RCV000018041

In the first patient reported with xeroderma pigmentosum complementation group G (XPG; 278780) (Cheesbrough, 1978; Keijzer et al., 1979), Lalle et al. (2002) identified compound heterozygosity for 2 mutations in the ERCC5 gene. One allele carried a 2573T-C transition, resulting in a leu858-to-pro (L858P) substitution within the evolutionarily conserved I region that is thought to form part of the XPG endonuclease active site (Constantinou et al., 1999). The other allele carried a 4-bp deletion (133530.0009).


.0009 XERODERMA PIGMENTOSUM, COMPLEMENTATION GROUP G

ERCC5, 4-BP DEL, 1114AGGA
  
RCV000018042...

In the first patient reported with xeroderma pigmentosum complementation group G (XPG; 278780) (Cheesbrough, 1978; Keijzer et al., 1979), Lalle et al. (2002) identified compound heterozygosity for 2 mutations in the ERCC5 gene: an L858P substitution (133530.0008), and a 4-bp deletion removing AGGA from nucleotide positions 1114 to 1117. The deletion created a frameshift resulting in a truncated protein of 376 amino acids.


.0010 XERODERMA PIGMENTOSUM, COMPLEMENTATION GROUP G

ERCC5, 1-BP DEL, 1491A
  
RCV000018043

In a patient with xeroderma pigmentosum complementation group G (XPG; 278780) reported by Arlett et al. (1980), Lalle et al. (2002) identified deletion of an adenosine from a stretch of 4 adenosines at nucleotides 1491 to 1494 of the ERCC5 gene. The resulting frameshift generated a truncated protein of 521 amino acids, the last 23 being unrelated to XPG. The other allele carried a deletion of an adenosine in a stretch of 9 adenosines (133530.0011).


.0011 XERODERMA PIGMENTOSUM, COMPLEMENTATION GROUP G

ERCC5, 1-BP DEL, 2743A
  
RCV000018044...

In a patient with xeroderma pigmentosum complementation group G (XPG; 278780), Lalle et al. (2002) identified compound heterozygosity for 2 small deletions in the ERCC5 gene. One allele had deletion of an adenosine at position 1491 (133530.0010), and the other had a deletion of an adenosine in a stretch of 9 adenosines at positions 2743 to 2751 of the ERCC5 gene. The authors designated this mutation 2751delA. An intron whose splice donor and acceptor sites are noncanonical is located between the deletion and the termination codon resulting from the frameshift; the mutation caused a minor alternative splicing event that removed the first 2 nucleotides of the following exon (2880-2881del). In this patient, the combination of this splicing event and the single-nucleotide deletion at position 2751 was predicted to restore the reading frame and thereby generate an almost full-length XPG protein of 1,185, instead of 1,186, amino acids. Such a protein would contain an internal stretch of 44 unrelated amino acids.


.0012 XERODERMA PIGMENTOSUM, COMPLEMENTATION GROUP G

ERCC5, ALA874THR
  
RCV000018045...

Emmert et al. (2002) reported a mildly affected 14-year-old Caucasian female with xeroderma pigmentosum complementation group G (XPG; 278780) who was compound heterozygous for 2 mutations in the ERCC5 gene: an early stop codon (Q136X; 133530.0013) and a 2817G-A transition resulting in an ala874-to-thr (A874T) substitution. The A874T mutant protein showed residual ability to complement XPG cells in vitro. The observations agreed with earlier studies demonstrating that XPG patients who retain residual functional activity in 1 allele can have mild clinical features without neurologic abnormalities. The patient had sun sensitivity but no neurologic abnormalities.


.0013 XERODERMA PIGMENTOSUM, COMPLEMENTATION GROUP G

ERCC5, GLN136TER
  
RCV000018046

In a mildly affected girl with xeroderma pigmentosum complementation group G (XPG; 278780), Emmert et al. (2002) identified compound heterozygosity for 2 mutations in the ERCC5 gene: a 603C-T transition in exon 4 resulting in a gln136-to-ter (Q136X) substitution and A874T (133530.0012). The A874T mutant protein retained residual activity.


.0014 XERODERMA PIGMENTOSUM, COMPLEMENTATION GROUP G

ERCC5, ALA28ASP
  
RCV000034376

In 2 sibs, born of unrelated Brazilian parents, with xeroderma pigmentosum complementation group G (XPG; 278780), Soltys et al. (2013) identified compound heterozygosity for 2 mutations in the ERCC5 gene: an 83C-A transversion, resulting in an ala28-to-asp (A28D) substitution at the N-endonucleolytic site, and a 2904G-C transversion, resulting in a trp968-to-cys (W968C; 133530.0015) substitution in the protein domain believed to be responsible for protein-DNA contact. In vitro functional expression studies showed that both mutant proteins were able to partially restore activity in cells lacking ERCC5 in response to UV light, but not as well as the wildtype protein. Both mutant proteins showed activity comparable to wildtype in response to oxidative stress. The patients had a relatively mild form of the disorder, with photosensitivity first apparent in infancy, but had no history of skin cancer or skin cancer precursor lesions up to ages 22 and 17 years, respectively. Patient cells showed a strong DNA repair defect in response to UV light, but not in response to oxidative stress. Soltys et al. (2013) suggested that more severe ERCC5 defects that also impair the response to oxidative stress-induced injury, usually truncating mutations, (see, e.g., 133530.0003) are associated with the more severe phenotype observed in Cockayne syndrome.


.0015 XERODERMA PIGMENTOSUM, COMPLEMENTATION GROUP G

ERCC5, TRP968CYS
  
RCV000034377

For discussion of the trp968-to-cys (W968C) mutation in the ERCC5 gene that was found in compound heterozygous state in patients with xeroderma pigmentosum complementation group G (XPG; 278780) by Soltys et al. (2013), see 133530.0014.


.0016 CEREBROOCULOFACIOSKELETAL SYNDROME 3

ERCC5, 1-BP DUP, 2766A
  
RCV000191920

In 4 fetuses, born of consanguineous Pakistani parents, with cerebrooculofacioskeletal syndrome-3 (COFS3; 616570), Drury et al. (2014) identified a homozygous 1-bp duplication (c.2766dupA) in exon 13 of the ERCC5 gene, resulting in a frameshift and premature termination (Leu923ThrfsTer7) that would eliminate the C terminus. The mutation, which was found by a combination of linkage analysis and exome sequencing, segregated with the disorder in the family. Functional studies of the variant were not performed.


REFERENCES

  1. Arlett, C. F., Harcourt, S. A., Lehman, A. R., Stevens, S., Ferguson-Smith, M. A., Morley, W. N. Studies on a new case of xeroderma pigmentosum (XP3BR) from complementation group G with cellular sensitivity to ionizing radiation. Carcinogenesis 1: 745-751, 1980. [PubMed: 11219864, related citations] [Full Text]

  2. Cheesbrough, M. J. Xeroderma pigmentosum--a unique variant with neurological involvement. Brit. J. Derm. 99 (Suppl. 16): 61 only, 1978. [PubMed: 698095, related citations]

  3. Cleaver, J. E., Thompson, L. H., Richardson, A. S., States, J. C. A summary of mutations in the UV-sensitive disorders: xeroderma pigmentosum, Cockayne syndrome, and trichothiodystrophy. Hum. Mutat. 14: 9-22, 1999. [PubMed: 10447254, related citations] [Full Text]

  4. Constantinou, A., Gunz, D., Evans, E., Lalle, P., Bates, P. A., Wood, R. D., Clarkson, S. G. Conserved residues of human XPG protein important for nuclease activity and function in nucleotide excision repair. J. Biol. Chem. 274: 5637-5648, 1999. [PubMed: 10026181, related citations] [Full Text]

  5. Cooper, P. K., Nouspikel, T., Clarkson, S. G., Leadon, S. A. Defective transcription-coupled repair of oxidative base damage in Cockayne syndrome patients from XP group G. Science 275: 990-993, 1997. Note: Retraction: Science 308: 1740 only, 2005. [PubMed: 9020084, related citations] [Full Text]

  6. Cooper, P. K., Nouspikel, T., Clarkson, S. G. Retraction. Science 308: 1740 only, 2005. [PubMed: 15961651, related citations] [Full Text]

  7. Drury, S., Boustred, C., Tekman, M., Stanescu, H., Kleta, R., Lench, N., Chitty, L. S., Scott, R. H. A novel homozygous ERCC5 truncating mutation in a family with prenatal arthrogryposis--further evidence of genotype-phenotype correlation. Am. J. Med. Genet. 164A: 1777-1783, 2014. [PubMed: 24700531, related citations] [Full Text]

  8. Emmert, S., Schneider, T. D., Khan, S. G., Kraemer, K. H. The human XPG gene: gene architecture, alternative splicing and single nucleotide polymorphisms. Nucleic Acids Res. 29: 1443-1452, 2001. [PubMed: 11266544, images, related citations] [Full Text]

  9. Emmert, S., Slor, H., Busch, D. B., Batko, S., Albert, R. B., Coleman, D., Khan, S. G., Abu-Libdeh, B., DiGiovanna, J. J., Cunningham, B. B., Lee, M.-M., Crollick, J., Inui, H., Ueda, T., Hedayati, M., Grossman, L., Shahlavi, T., Cleaver, J. E., Kraemer, K. H. Relationship of neurologic degeneration to genotype in three xeroderma pigmentosum group G patients. J. Invest. Derm. 118: 972-982, 2002. Note: Erratum: J. Invest. Derm. 120: 173 only, 2003. [PubMed: 12060391, related citations] [Full Text]

  10. Gersen, S., Warburton, D., Jackson, C. L., Housman, D. Regional localization of the excision repair gene ERCC5 on chromosome 13. (Abstract) Cytogenet. Cell Genet. 51: 1003 only, 1989.

  11. Graham, J. M., Jr., Anyane-Yeboa, K., Raams, A., Appeldoorn, E., Kleijer, W. J., Garritsen, V. H., Busch, D., Edersheim, T. G., Jaspers, N. G. J. Cerebro-oculo-facio-skeletal syndrome with a nucleotide excision-repair defect and a mutated XPD gene, with prenatal diagnosis in a triplet pregnancy. Am. J. Hum. Genet. 69: 291-300, 2001. [PubMed: 11443545, images, related citations] [Full Text]

  12. Habraken, Y., Sung, P., Prakash, L., Prakash, S. Human xeroderma pigmentosum group G gene encodes a DNA endonuclease. Nucleic Acids Res. 22: 3312-3316, 1994. [PubMed: 8078765, related citations] [Full Text]

  13. Habraken, Y., Sung, P., Prakash, S., Prakash, L. Transcription factor TFIIH and DNA endonuclease Rad2 constitute yeast nucleotide excision repair factor 3: implications for nucleotide excision repair and Cockayne syndrome. Proc. Nat. Acad. Sci. 93: 10718-10722, 1996. [PubMed: 8855246, related citations] [Full Text]

  14. Hamel, B. C. J., Raams, A., Schuitema-Dijkstra, A. R., Simons, P., van der Burgt, I., Jaspers, N. G. J., Kleijer, W. J. Xeroderma pigmentosum-Cockayne syndrome complex: a further case. J. Med. Genet. 33: 607-610, 1996. [PubMed: 8818951, related citations] [Full Text]

  15. Harada, Y.-N., Matsuda, Y., Shiomi, N., Shiomi, T. Complementary DNA sequence and chromosomal localization of xpg, the mouse counterpart of human repair gene XPG/ERCC5. Genomics 28: 59-65, 1995. [PubMed: 7590748, related citations] [Full Text]

  16. Hori, T., Shiomi, T., Sato, K. Human chromosome 13 compensates a DNA repair defect in UV-sensitive mouse cells by mouse-human cell hybridization. Proc. Nat. Acad. Sci. 80: 5655-5659, 1983. [PubMed: 6577448, related citations] [Full Text]

  17. Ito, S., Kuraoka, I., Chymkowitch, P., Compe, E., Takedachi, A., Ishigami, C., Coin, F., Egly, J.-M., Tanaka, K. XPG stabilizes TFIIH, allowing transactivation of nuclear receptors: implications for Cockayne syndrome in XP-G/CS patients. Molec. Cell 26: 231-243, 2007. [PubMed: 17466625, related citations] [Full Text]

  18. Jaeken, J., Klocker, H., Schwaiger, H., Bellmann, R., Hirsch-Kauffmann, M., Schweiger, M. Clinical and biochemical studies in three patients with severe early infantile Cockayne syndrome. Hum. Genet. 83: 339-346, 1989. [PubMed: 2478446, related citations] [Full Text]

  19. Keijzer, W., Jaspers, N. G. J., Abrahams, P. J., Taylor, A. M. R., Arlett, C. F., Zelle, B., Takebe, H., Kinmont, P. D. S., Bootsma, D. A seventh complementation group in excision-deficient xeroderma pigmentosum. Mutat. Res. 62: 183-190, 1979. [PubMed: 492197, related citations] [Full Text]

  20. Lalle, P., Nouspikel, T., Constantinou, A., Thorel, F., Clarkson, S. G. The founding members of xeroderma pigmentosum group G produce XPG protein with severely impaired endonuclease activity. J. Invest. Derm. 118: 344-351, 2002. [PubMed: 11841555, related citations] [Full Text]

  21. Lee, S.-K., Yu, S.-L., Prakash, L., Prakash, S. Requirement of yeast RAD2, a homolog of human XPG gene, for efficient RNA polymerase II transcription: implications for Cockayne syndrome. Cell 109: 823-834, 2002. [PubMed: 12110180, related citations] [Full Text]

  22. Lehmann, A. R., Bootsma, D., Clarkson, S. G., Cleaver, J. E., McAlpine, P. J., Tanaka, K., Thompson, L. H., Wood, R. D. Nomenclature of human DNA repair genes. Mutat. Res. 315: 41-42, 1994. [PubMed: 7517009, related citations] [Full Text]

  23. MacInnes, M. A., Dickson, J. A., Hernandez, R. R., Learmonth, D., Lin, G. Y., Mudgett, J. S., Park, M. S., Schauer, S., Reynolds, R. J., Strniste, G. F., Yu, J. Y. Human ERCC5 cDNA-cosmid complementation for excision repair and bipartite amino acid domains conserved with RAD proteins of Saccharomyces cerevisiae and Schizosaccharomyces pombe. Molec. Cell. Biol. 13: 6393-6402, 1993. [PubMed: 8413238, related citations] [Full Text]

  24. Mudgett, J. S., MacInnes, M. A. Isolation of the functional human excision repair gene ERCC5 by intercosmid recombination. Genomics 8: 623-633, 1990. [PubMed: 2276736, related citations] [Full Text]

  25. Norris, P. G., Hawk, J. L. M., Avery, J. A., Giannelli, F. Xeroderma pigmentosum complementation group G--report of two cases. Brit. J. Derm. 116: 861-866, 1987. [PubMed: 3620347, related citations] [Full Text]

  26. Nouspikel, T., Clarkson, S. G. Mutations that disable the DNA repair gene XPG in a xeroderma pigmentosum group G patient. Hum. Molec. Genet. 3: 963-967, 1994. [PubMed: 7951246, related citations] [Full Text]

  27. Nouspikel, T., Lalle, P., Leadon, S. A., Cooper, P. K., Clarkson, S. G. A common mutational pattern in Cockayne syndrome patients from xeroderma pigmentosum group G: implications for a second XPG function. Proc. Nat. Acad. Sci. 94: 3116-3121, 1997. Note: Retraction: Proc. Nat. Acad. Sci. 103: 19606 only, 2006. Figure 6 was retracted as part of a Voluntary Exclusion Agreement between the author Steven A. Leadon and the U.S. Department of Health and Human Services (HHS) through the Public Health Service and the Office of Research Integrity; see Notice of Findings of Scientific Misconduct from HHS (71 Federal Register 110 (June 8, 2006/Notices) pp 33308-33309). [PubMed: 9096355, related citations] [Full Text]

  28. O'Donovan, A., Davies, A. A., Moggs, J. G., West, S. C., Wood, R. D. XPG endonuclease makes the 3-prime incision in human DNA nucleotide excision repair. Nature 371: 432-435, 1994. [PubMed: 8090225, related citations] [Full Text]

  29. O'Donovan, A., Scherly, D., Clarkson, S. G., Wood, R. D. Isolation of active recombinant XPG protein, a human DNA repair endonuclease. J. Biol. Chem. 269: 15965-15968, 1994. [PubMed: 8206890, related citations]

  30. O'Donovan, A., Wood, R. D. Identical defects in DNA repair in xeroderma pigmentosum group G and rodent ERCC group 5. Nature 363: 185-188, 1993. [PubMed: 8483505, related citations] [Full Text]

  31. Samec, S., Jones, T. A., Corlet, J., Scherly, D., Sheer, D., Wood, R. D., Clarkson, S. G. The human gene for xeroderma pigmentosum complementation group G (XPG) maps to 13q33 by fluorescence in situ hybridization. Genomics 21: 283-285, 1994. [PubMed: 8088806, related citations] [Full Text]

  32. Sarker, A. H., Tsutakawa, S. E., Kostek, S., Ng, C., Shin, D. S., Peris, M., Campeau, E., Tainer, J. A., Nogales, E., Cooper, P. K. Recognition of RNA polymerase II and transcription bubbles by XPG, CSB, and TFIIH: insights for transcription-coupled repair and Cockayne syndrome. Molec. Cell 20: 187-198, 2005. [PubMed: 16246722, related citations] [Full Text]

  33. Scherly, D., Nouspikel, T., Corlet, J., Ucla, C., Bairoch, A., Clarkson, S. G. Complementation of the DNA repair defect in xeroderma pigmentosum group G cells by a human cDNA related to yeast RAD2. Nature 363: 182-185, 1993. [PubMed: 8483504, related citations] [Full Text]

  34. Shiomi, N., Kito, S., Oyama, M., Matsunaga, T., Harada, Y.-N., Ikawa, M., Okabe, M., Shiomi, T. Identification of the XPG region that causes the onset of Cockayne syndrome by using Xpg mutant mice generated by the cDNA-mediated knock-in method. Molec. Cell. Biol. 24: 3712-3719, 2004. [PubMed: 15082767, images, related citations] [Full Text]

  35. Shiomi, T., Harada, Y., Saito, T., Shiomi, N., Okuno, Y., Yamaizumi, M. An ERCC5 gene with homology to yeast RAD2 is involved in group G xeroderma pigmentosum. Mutat. Res. 314: 167-175, 1994. [PubMed: 7510366, related citations] [Full Text]

  36. Siciliano, M. J., Bachinski, L., Dolf, G., Carrano, A. V., Thompson, L. H. Chromosomal assignments of human DNA repair genes that complement Chinese hamster ovary (CHO) cell mutants. (Abstract) Cytogenet. Cell Genet. 46: 691-692, 1987.

  37. Soltys, D. T., Rocha, C. R. R., Lerner, L. K., de Souza, T. A., Munford, V., Cabral, F., Nardo, T., Stefanini, M., Sarasin, A., Cabral-Neto, J. B., Menck, C. F. M. Novel XPG (ERCC5) mutations affect DNA repair and cell survival after ultraviolet but not oxidative stress. Hum. Mutat. 34: 481-489, 2013. [PubMed: 23255472, related citations] [Full Text]

  38. Takahashi, E., Shiomi, N., Shiomi, T. Precise localization of the excision repair gene, ERCC5, to human chromosome 13q32.3-q33.1 by direct R-banding fluorescence in situ hybridization. Jpn. J. Cancer Res. 83: 1117-1119, 1992. [PubMed: 1483924, related citations] [Full Text]

  39. Thompson, L. H., Carrano, A. V., Sato, K., Salazar, E. P., White, B. F., Stewart, S. A., Minkler, J. L., Siciliano, M. J. Identification of nucleotide-excision-repair genes on human chromosomes 2 and 13 by functional complementation in hamster-human hybrids. Somat. Cell Molec. Genet. 13: 539-551, 1987. [PubMed: 3477874, related citations] [Full Text]

  40. Vermeij, W. P., Dolle, M. E. T., Reiling, E., Jaarsma, D., Payan-Gomez, C., Bombardieri, C. R., Wu, H., Roks, A. J. M., Botter, S. M., van der Eerden, B. C., Youssef, S. A., Kuiper, R. V., and 12 others. Restricted diet delays accelerated ageing and genomic stress in DNA-repair-deficient mice. Nature 537: 427-431, 2016. [PubMed: 27556946, images, related citations] [Full Text]

  41. Vermeulen, W., Jaeken, J., Jaspers, N. G. J., Bootsma, D., Hoeijmakers, J. H. J. Xeroderma pigmentosum complementation group G associated with Cockayne syndrome. Am. J. Hum. Genet. 53: 185-192, 1993. [PubMed: 8317483, related citations]

  42. Volker, M., Mone, M. J., Karmakar, P., van Hoffen, A., Schul, W., Vermeulen, W., Hoeijmakers, J. H. J., van Driel, R., van Zeeland, A. A., Mullenders, L. H. F. Sequential assembly of the nucleotide excision repair factors in vivo. Molec. Cell 8: 213-224, 2001. [PubMed: 11511374, related citations] [Full Text]

  43. Warburton, D., Yu, M.-T., Richardson, C., Mudgett, J. S., MacInnes, M. A. Human excision repair gene ERCC5 maps to 13q32-q33 by in situ hybridization and also cross-hybridizes to 10q11, the site of ERCC6. (Abstract) Cytogenet. Cell Genet. 58: 1984 only, 1991.

  44. Zafeiriou, D. I., Thorel, F., Andreou, A., Kleijer, W. J., Raams, A., Garritsen, V. H., Gombakis, N., Jaspers, N. G. J., Clarkson, S. G. Xeroderma pigmentosum group G with severe neurological involvement and features of Cockayne syndrome in infancy. Pediat. Res. 49: 407-412, 2001. [PubMed: 11228268, related citations] [Full Text]


Ada Hamosh - updated : 09/28/2016
Cassandra L. Kniffin - updated : 9/23/2015
Cassandra L. Kniffin - updated : 4/2/2013
Cassandra L. Kniffin - reorganized : 7/16/2007
Patricia A. Hartz - updated : 11/22/2005
Ada Hamosh - updated : 7/20/2005
Patricia A. Hartz - updated : 6/25/2004
Gary A. Bellus - updated : 4/30/2003
Anne M. Stumpf - updated : 4/25/2003
Stylianos E. Antonarakis - updated : 7/31/2002
Victor A. McKusick - updated : 8/30/2001
Stylianos E. Antonarakis - updated : 8/3/2001
Ada Hamosh - updated : 4/26/2001
Victor A. McKusick - updated : 7/21/1999
Victor A. McKusick - updated : 5/13/1997
Victor A. McKusick - updated : 2/13/1997
Creation Date:
Victor A. McKusick : 9/2/1987
carol : 09/16/2022
carol : 03/19/2020
carol : 03/18/2020
carol : 09/11/2017
alopez : 09/28/2016
carol : 08/11/2016
alopez : 09/25/2015
ckniffin : 9/23/2015
mcolton : 6/3/2015
carol : 4/6/2015
mcolton : 3/30/2015
alopez : 3/10/2014
alopez : 4/5/2013
ckniffin : 4/2/2013
alopez : 11/13/2012
carol : 5/10/2012
carol : 12/3/2010
carol : 1/12/2010
carol : 7/16/2007
ckniffin : 7/16/2007
ckniffin : 7/6/2007
alopez : 2/12/2007
alopez : 2/12/2007
alopez : 2/12/2007
wwang : 11/29/2005
terry : 11/22/2005
alopez : 7/20/2005
terry : 7/20/2005
terry : 7/19/2005
ckniffin : 6/15/2005
alopez : 7/8/2004
mgross : 6/29/2004
terry : 6/25/2004
joanna : 3/17/2004
carol : 11/5/2003
terry : 6/9/2003
alopez : 4/30/2003
alopez : 4/25/2003
alopez : 4/25/2003
mgross : 7/31/2002
cwells : 9/20/2001
cwells : 9/12/2001
terry : 8/30/2001
mgross : 8/3/2001
alopez : 5/8/2001
terry : 4/26/2001
terry : 7/21/1999
terry : 8/3/1998
terry : 5/29/1998
alopez : 7/7/1997
jenny : 5/13/1997
alopez : 5/9/1997
alopez : 5/8/1997
terry : 5/7/1997
mark : 2/13/1997
terry : 2/13/1997
jamie : 12/6/1996
terry : 12/3/1996
mark : 12/12/1995
terry : 12/8/1995
mark : 8/17/1995
carol : 1/6/1995
mimadm : 9/24/1994
terry : 7/25/1994
jason : 6/7/1994
warfield : 4/8/1994

* 133530

ERCC EXCISION REPAIR 5, ENDONUCLEASE; ERCC5


Alternative titles; symbols

EXCISION REPAIR, COMPLEMENTING DEFECTIVE, IN CHINESE HAMSTER, 5
ERCM2
UV DAMAGE, EXCISION REPAIR OF, UV-135; UVDR
RAD2, YEAST, HOMOLOG OF
XERODERMA PIGMENTOSUM, GROUP G CORRECTING PROTEIN; XPGC
XPG GENE; XPG


HGNC Approved Gene Symbol: ERCC5

SNOMEDCT: 36454001;  


Cytogenetic location: 13q33.1     Genomic coordinates (GRCh38): 13:102,846,032-102,875,995 (from NCBI)


Gene-Phenotype Relationships

Location Phenotype Phenotype
MIM number
Inheritance Phenotype
mapping key
13q33.1 Cerebrooculofacioskeletal syndrome 3 616570 Autosomal recessive 3
Xeroderma pigmentosum, group G 278780 Autosomal recessive 3
Xeroderma pigmentosum, group G/Cockayne syndrome 278780 Autosomal recessive 3

TEXT

Description

The human genes correcting DNA repair defects are termed excision repair cross-complementing, or ERCC, genes. A number appended to the symbol refers to the rodent complementary group that is corrected by the human gene. The ERCC5 gene corrects the excision repair deficiency of Chinese hamster ovary cell line UV135 of complementation group 5. The human ERCC5 gene product is a structure-specific endonuclease required for making the 3-prime incision during DNA nucleotide excision repair (NER). See also ERCC1 (126380), ERCC2 (126340), ERCC3 (133510), ERCC4 (133520), and ERCC6 (609413).


Cloning and Expression

Mudgett and MacInnes (1990) isolated the complete human ERCC5 gene on overlapping cosmids. The functional gene was found to be 32 kb long.

MacInnes et al. (1993) isolated clones corresponding to the ERCC5 gene from human cDNA libraries. The deduced 1,186-residue protein has a molecular mass of 133 kD and shows sequence and structural similarity to yeast RAD2, which is involved in the nucleotide excision repair pathway. The human mRNA was 4.6 kb. Further analysis suggested that the protein is nuclear-located with highly conserved helix-loop-helix segments. Shiomi et al. (1994) isolated clones corresponding to both the mouse and human ERCC5 genes and confirmed that XPG and ERCC5 are identical.

Emmert et al. (2001) identified 6 alternatively spliced isoforms of the XPG gene.

Scherly et al. (1993) isolated frog and human cDNAs encoding proteins resembling RAD2. Alignment of these 3 polypeptides, together with 2 other RAD2-related proteins, demonstrated that their conserved sequences are largely confined to 2 regions. Expression of the human cDNA in vivo restored to normal the sensitivity to ultraviolet light and unscheduled DNA synthesis of lymphoblastoid cells from XP group G (278780), but not those from Cockayne syndrome group A (CSA; 216400). The XPG-complementing protein (XPGC) was generated from an mRNA of approximately 4 kb that was present in normal amounts in the XPG cell line.

O'Donovan et al. (1994) reported the isolation of full-length XPG as a soluble protein expressed from a recombinant baculovirus. The purified polypeptide corrected the DNA nucleotide excision repair defect of XPG cell extracts in vitro and acted as a magnesium-dependent single-stranded DNA endonuclease.

Harada et al. (1995) demonstrated that the mouse Xpg cDNA has a single long open reading frame predicted to encode a 1,170-residue protein with a molecular mass of 130.8 kD. The Xpg gene expressed a single 4.3-kb mRNA transcript at similar levels in 5 mouse tissues examined.


Gene Structure

Emmert et al. (2001) determined that the human XPG gene contains 15 exons.


Mapping

Using somatic cell hybrids between a UV-sensitive mutant mouse cell line and normal human lymphocytes, Hori et al. (1983) found that a gene on human chromosome 13 was able to compensate for an autosomal recessive DNA excision repair defect in mouse cell line Q31. Siciliano et al. (1987) and Thompson et al. (1987) assigned ERCC5 to chromosome 13 by study of somatic cell hybrids between normal human cells and Chinese hamster cells defective in UV-induced nucleotide excision repair (UV135, complementation group 5). Study of hybrid cells containing rearranged human chromosomes indicated that the ERCC5 locus is situated in the region 13q14-q34.

Gersen et al. (1989) used somatic cell hybrids containing fragments of chromosome 13 to localize ERCC5 to human chromosome 13q22-qter. By fluorescence in situ hybridization, Warburton et al. (1991) mapped the ERCC5 gene to 13q32-qter but also found a strong hybridization signal at 10q11 where ERCC6 is located.

By fluorescence in situ hybridization, Takahashi et al. (1992) mapped the ERCC5 gene to 13q32.3-q33.1. By the same method, Samec et al. (1994) assigned the XPG gene to 13q33.

By in situ hybridization and by molecular linkage analysis, Harada et al. (1995) mapped the mouse Xpg gene 2.3 cM proximal to the microsatellite locus D1Mit18 on the R-positive B band of chromosome 1. The rat homolog was localized to chromosome 9q22.3, which had been known to have a conserved linkage homology to mouse chromosome 1. The assignment of human XPG to chromosome 13q32.3-q33.1 represents an area where no conserved linkage homology to mouse chromosome 1 had previously been found.


Gene Function

O'Donovan and Wood (1993) found that the DNA repair deficiency of XPG cell extracts could be corrected by addition of protein fractions from normal cells and by mixing XPG cell extracts with extracts from different repair-defective cell lines, except from cells representing ERCC5 rodent mutants. XPG and group 5 correcting activities co-eluted after approximately 1,000-fold purification from HeLa cells. An antibody directed against a fragment of the XPG protein inhibited excision repair by normal cell extracts, and activity could be restored with an XPG/group 5 complementing fraction. These data suggested that XPG and ERCC5 are identical proteins. O'Donovan et al. (1994) showed that the XPG endonuclease cleaves the damaged DNA strand 3-prime to the lesion during nucleotide excision repair.

Habraken et al. (1994) expressed the XPG-encoded protein in Sf9 insect cells and purified it to homogeneity. They demonstrated that XPG is a single-strand specific DNA endonuclease, thus identifying the catalytic role of the protein in nucleotide excision repair. They suggested that XPG nuclease acts on the single-stranded region created as a result of the combined action of the XPB helicase and XPD helicase at the DNA damage site.

TFIIH (see 189972) is a multisubunit transcription factor complex involved in nucleotide excision repair. In humans, mutations in the TFIIH subunits XPD (126340) and XPB (133510), the counterparts of the yeast RAD3 and RAD25 genes, respectively, cause Cockayne syndrome, which is characterized by severe growth defects, mental retardation, and cachexia. In yeast studies, Habraken et al. (1996) found that RAD2 forms a stable subassembly with TFIIH, which they designated nucleotide excision repair factor-3 (NEF3). Association with TFIIH provided a means of targeting RAD2 to the damaged site, where its endonuclease activity would mediate the 3-prime incision. Habraken et al. (1996) speculated that mutations in XPB, XPD, and XPG that result in Cockayne syndrome all impair TFIIH function in a similar manner by resulting in a deficiency in the rate of elongation of certain transcripts.

Volker et al. (2001) described the assembly of the NER complex in normal and repair-deficient (xeroderma pigmentosum) human cells by employing a novel technique of local ultraviolet irradiation combined with fluorescent antibody labeling. The damage-recognition complex XPC (613208)-HR23B (RAD23B; 600062) appeared to be essential for the recruitment of all subsequent NER factors in the preincision complex, including transcription repair factor TFIIH. Volker et al. (2001) found that XPA (611153) associated relatively late, was required for anchoring of subsequent subunits, and appeared to be essential for activation of the endonuclease activity of XPG. These findings identified XPC as the earliest known NER factor in the reaction mechanism and supported a concept of sequential assembly of repair proteins at the site of damage rather than a preassembled 'repairosome.'

Lee et al. (2002) provided evidence that S. cerevisiae Rad2 is involved in promoting efficient RNA polymerase II transcription. Inactivation of Rad26, the S. cerevisiae counterpart of the human ERCC6 gene, also caused a deficiency in transcription, and a synergistic decline in transcription occurred in the absence of both the Rad2 and Rad26 genes. Growth was also retarded in Rad2-deletion and Rad26-deletion single mutant strains, and a very severe growth inhibition was seen in Rad2-deletion/Rad26-deletion double mutants.

Sarker et al. (2005) found that XPG interacted with elongating RNA polymerase II in HeLa cells and bound stalled ternary complexes in vitro both independently and cooperatively with ERCC6. XPG bound transcription-sized DNA bubbles, through 2 domains not required for incision, stimulated ERCC6 binding to DNA bubbles and enhanced the ATPase activity of ERCC6. Bound RNA polymerase II blocked bubble incision by XPG, but an ATP hydrolysis-dependent process involving TFIIH created access to the junction, allowing incision. Sarker et al. (2005) concluded that coordinated recognition of stalled transcription by XPG and ERCC6 initiates transcription-coupled repair, and that TFIIH-dependent remodeling of stalled RNA polymerase II without release may be sufficient to allow repair.

Ito et al. (2007) found that XPG forms a stable complex with TFIIH and that the complex was able to repair damaged DNA in an in vitro assay of NER using cell extracts from XPB, XPD, or XPG cells. A mutation in the XPG gene that lacked the C terminus (133530.0003) and was unable to bind TFIIH resulted in a severe phenotype with XPG/Cockayne syndrome, whereas a missense mutation (133530.0002) that retained the C terminus region and had the ability to bind TFIIH resulted in a milder XPG phenotype. Mutations in the XPG gene that disrupted the C terminal and prevented the association with TFIIH also resulted in the disassociation of CAK (CCNH; 601953) and XPD from TFIIH. Further in vitro studies showed that XPG cells were deficient in ligand-induced transactivation of nuclear receptors due to hypophosphorylation resulting from the disintegration of TFIIH subunits. Ito et al. (2007) suggested that defective transactivation of nuclear receptors may account for some of the variable phenotypic features associated with XPG/Cockayne syndrome, such as growth failure and hypogonadism. The findings indicated that XPG plays a role in the stabilization of TFIIH and in the regulation of gene expression.


Molecular Genetics

Nouspikel and Clarkson (1994) found that 2 sibs with xeroderma pigmentosum complementation group G (XPG; 278780) were compound heterozygous for 2 point mutations in the ERCC5 gene (133530.0001; 133530.0002).

Lalle et al. (2002) found that the first 2 patients reported with XPG (Cheesbrough, 1978; Keijzer et al., 1979; Arlett et al., 1980) produced XPG protein with severely impaired endonuclease activity. Both patients were compound heterozygous for truncating mutations in the ERCC5 gene (133530.0009, 133530.0010) and another mutation (133530.0008 and 133530.0011, respectively). These cells, unlike those from xeroderma pigmentosum group G/Cockayne syndrome patients, were capable of limited transcription-coupled repair of oxidative lesions. Lalle et al. (2002) suggested that the residual ERCC5 activity in these patients was responsible for the absence of severe early-onset Cockayne syndrome symptoms.

Nouspikel et al. (1997) studied the nature of the molecular defect in the first 3 documented cases of combined XPG and Cockayne syndrome (see 278780) reported by Jaeken et al. (1989), Vermeulen et al. (1993), and Hamel et al. (1996). They found an unexpected common mutational pattern in the 3 patients with XPG/CS that was distinct from that found in 2 sibs with mild XPG without CS symptoms (Norris et al., 1987). Nouspikel et al. (1997) found that the 3 XPG/CS patients had mutations that were predicted to produce severely truncated XPG proteins. In contrast, 2 sib XPG patients without CS reported by Nouspikel and Clarkson (1994) were able to make full-length XPG, but had a mutation that inactivated its function in NER. The results suggested that XPG/CS mutations abolish interactions required for a second important XPG function and that it is the loss of this second function that leads to the CS clinical phenotype. (Note that Figure 6 of the report of Nouspikel et al. (1997) was retracted under a Voluntary Exclusion Agreement between one of the authors, Steven A. Leaden, and the U.S. Department of Health and Human Services. The other authors stated that the other findings and conclusions of the article were not challenged by retraction of Figure 6.)

Cleaver et al. (1999) reviewed mutations that had been described in the XPG gene.

Cerebrooculofacioskeletal Syndrome 3

In a boy, born of consanguineous Moroccan parents, with cerebrooculofacioskeletal syndrome-3 (COFS3; 616570) originally reported by Hamel et al. (1996), Nouspikel et al. (1997) identified a homozygous truncating mutation in the ERCC5 gene (133530.0003).

In 4 fetuses from a large consanguineous Pakistani kindred with COFS3, Drury et al. (2014) identified a homozygous truncating mutation in the ERCC5 gene (133530.0016) predicting the loss of the C terminus. The mutation, which was found by a combination of linkage analysis and exome sequencing, segregated with the disorder in the family. Functional studies of the variant were not performed.


Animal Model

Shiomi et al. (2004) created mice carrying mutations in the Xpg gene leading to C-terminal deletions in the protein. Mice homozygous for a mutation leading to deletion of the last 360 amino acids exhibited growth retardation and a shorter life span than controls, but they had a slightly milder CS phenotype than Xpg null mice. Mice homozygous for a mutation leading to deletion of the last 183 amino acids showed no growth abnormalities compared with wildtype mice.

Vermeij et al. (2016) reported that a dietary restriction of 30% tripled the median and maximal remaining lifespans of Ercc1 (126380) delta/- progeroid mice, strongly retarding numerous aspects of accelerated aging. Mice undergoing dietary restriction retained 50% more neurons and maintained full motor function far beyond the lifespan of mice fed ad libitum. Ercc5 -/- mice, another DNA repair-deficient progeroid mouse that models Cockayne syndrome (see 278780), responded similarly. The dietary restriction response in Ercc1 delta/- mice closely resembled the effects of dietary restriction in wildtype animals. Notably, liver tissue from Ercc1 delta/- mice fed ad libitum showed preferential extinction of the expression of long genes, a phenomenon also observed in several tissues aging normally. This is consistent with the accumulation of stochastic, transcription-blocking lesions that affect long genes more than short ones. Dietary restriction largely prevented this declining transcriptional output and reduced the number of gamma-H2AX (601772) DNA damage foci, indicating that dietary restriction preserves genome function by alleviating DNA damage. Vermeij et al. (2016) concluded that their findings established the Ercc1 delta/- mouse as a powerful model organism for health-sustaining interventions, revealed potential for reducing endogenous DNA damage, facilitated a better understanding of the molecular mechanism of dietary restriction, and suggested a role for counterintuitive dietary restriction-like therapy for human progeroid genome instability syndromes and possibly neurodegeneration in general.


Nomenclature

Lehmann et al. (1994) recommended that the final C in the XPGC symbol be omitted and the gene cited as XPG. Furthermore, they recommended that when an inactivating mutation in the ERCC5 gene is identified in an XPG patient, XPG should be used as the gene symbol.


History

Cooper et al. (1997) reported that oxidative damage, including thymine glycols, is removed by transcription-coupled repair in cells from normal individuals and from patients with xeroderma pigmentosum of complementation groups A (XPA; 278700), F (XPF; 278760), and G who have NER defects, but not from XPG patients who have severe Cockayne syndrome. Cooper et al. (2005) retracted the paper of Cooper et al. (1997), stating that the results were not valid as reported and that the overall integrity of the paper could not be supported by the presented results.


ALLELIC VARIANTS 16 Selected Examples):

.0001   XERODERMA PIGMENTOSUM, COMPLEMENTATION GROUP G

ERCC5, GLU960TER
SNP: rs121434570, gnomAD: rs121434570, ClinVar: RCV000018034, RCV000587956, RCV003556039

In lymphoblastoid cell lines derived from 2 sibs with xeroderma pigmentosum complementation group G (XPG; 278780), Nouspikel and Clarkson (1994) identified compound heterozygosity for 2 mutations in the ERCC5 gene: a 3075G-T transversion resulting in a glu960-to-ter (Q960X) substitution and a truncated protein of 959 amino acids, and A792V (133530.0002). In vitro functional expression studies showed that neither mutant protein was able to correct UV sensitivity.


.0002   XERODERMA PIGMENTOSUM, COMPLEMENTATION GROUP G

ERCC5, ALA792VAL
SNP: rs121434571, gnomAD: rs121434571, ClinVar: RCV000018035

In 2 sibs with xeroderma pigmentosum complementation group G (XPG; 278780), Nouspikel and Clarkson (1994) identified a 2572C-T transition in the ERCC5 gene, resulting in an ala792-to-val (A792V) substitution. The mutation was found in compound heterozygosity with Q960X (133530.0001). In vitro functional expression studies showed that neither mutant protein was able to correct UV sensitivity.

Ito et al. (2007) found that the A792V mutant protein, which contains an intact C terminus, was able to bind TFIIH in a manner similar to that of wildtype ERCC5, likely resulting in the milder phenotype.


.0003   CEREBROOCULOFACIOSKELETAL SYNDROME 3

ERCC5, 1-BP DEL, 2972T
SNP: rs2140538834, ClinVar: RCV000018036

In a patient with cerebrooculofacioskeletal syndrome-3 (COFS3; 616570) manifest as severe early-onset XPG/Cockayne syndrome reported by Hamel et al. (1996), Nouspikel et al. (1997) identified a homozygous 1-bp deletion (2972delT) in the ERCC5 gene, resulting in a frameshift after amino acid 925; another 55 amino acids unrelated to XPG would be added before the next in-frame stop codon. The child was born of first-cousin Moroccan parents and died at age 7 months.

Graham et al. (2001) referred to the case reported by Hamel et al. (1996) as one of COFS syndrome. The patient showed prenatal-onset growth deficiency, severe microcephaly, microphthalmia without cataracts, cleft palate, cutaneous photosensitivity, and brain atrophy without calcifications. Skin fibroblasts showed extreme cellular sensitivity to UV, comparable to that in classic xeroderma pigmentosum. Using in vitro studies, Ito et al. (2007) found that the mutant 2972delT protein, which lacked the C terminus, was unable to bind the TFIIH complex, likely resulting in the more severe phenotype.


.0004   XERODERMA PIGMENTOSUM GROUP G/COCKAYNE SYNDROME

ERCC5, 1-BP DEL, 2170A
SNP: rs1882806435, ClinVar: RCV002266207, RCV002266208

In a Flemish girl with XPG/Cockayne syndrome (see 278780), Nouspikel et al. (1997) identified a homozygous 1-bp deletion within an AAA triplet at nucleotides 2170-2172, which resulted in a TGA stop codon after amino acid 659. Such a deletion was considered characteristic of a slippage error during DNA replication. The patient had psychomotor retardation, microcephaly, and was severely sunlight-sensitive with several pigmented cutaneous spots (Jaeken et al., 1989; Vermeulen et al., 1993). She died at 6.5 years of age.


.0005   XERODERMA PIGMENTOSUM GROUP G/COCKAYNE SYNDROME

ERCC5, ARG263TER
SNP: rs121434572, gnomAD: rs121434572, ClinVar: RCV000018038

In fibroblasts derived from a Flemish male with XPG/Cockayne syndrome (see 278780) Nouspikel et al. (1997) identified compound heterozygosity for 2 mutations in the ERCC5 gene: a 984C-T transition resulting in an arg263-to-ter (R263X) substitution and a severely truncated protein, and a 1-bp deletion (113530.0004) that had been identified in an unrelated Flemish girl. The 984C-T transition was located within a CpG dinucleotide and thus may have resulted from deamination of a 5-methylcytosine. The patient had extreme microcephaly, dysmorphism, and sun-sensitive skin with several pigmented spots. He died at age 20 months. The 2 patients were not known to be related, but possessed a very rare HLA haplotype in common.


.0006   XERODERMA PIGMENTOSUM GROUP G/COCKAYNE SYNDROME

ERCC5, GLN176TER
SNP: rs121434573, gnomAD: rs121434573, ClinVar: RCV000018039

In a patient with xeroderma pigmentosum complementation group G and neurologic involvement with features of Cockayne syndrome (see 278780) in infancy, Zafeiriou et al. (2001) identified compound heterozygosity for 2 mutations in the ERCC5 gene: a 526C-T transition resulting in a gln176-to-ter (Q176X) substitution, and P72H (133530.0007). Only a minor fraction of ERCC5 mRNA was encoded by the Q176X allele.


.0007   XERODERMA PIGMENTOSUM GROUP G/COCKAYNE SYNDROME

ERCC5, PRO72HIS
SNP: rs121434574, gnomAD: rs121434574, ClinVar: RCV000018040

In a patient with XPG/Cockayne syndrome (see 278780), Zafeiriou et al. (2001) identified a 215C-A transversion in the ERCC5 gene, resulting in a pro72-to-his (P72H) substitution. This mutation was found in compound heterozygosity with Q176X (133530.0006). The P72H substitution was expected to seriously impair the 3-prime endonuclease function of XPG.


.0008   XERODERMA PIGMENTOSUM, COMPLEMENTATION GROUP G

ERCC5, LEU858PRO
SNP: rs121434575, ClinVar: RCV000018041

In the first patient reported with xeroderma pigmentosum complementation group G (XPG; 278780) (Cheesbrough, 1978; Keijzer et al., 1979), Lalle et al. (2002) identified compound heterozygosity for 2 mutations in the ERCC5 gene. One allele carried a 2573T-C transition, resulting in a leu858-to-pro (L858P) substitution within the evolutionarily conserved I region that is thought to form part of the XPG endonuclease active site (Constantinou et al., 1999). The other allele carried a 4-bp deletion (133530.0009).


.0009   XERODERMA PIGMENTOSUM, COMPLEMENTATION GROUP G

ERCC5, 4-BP DEL, 1114AGGA
SNP: rs786200919, ClinVar: RCV000018042, RCV002276555

In the first patient reported with xeroderma pigmentosum complementation group G (XPG; 278780) (Cheesbrough, 1978; Keijzer et al., 1979), Lalle et al. (2002) identified compound heterozygosity for 2 mutations in the ERCC5 gene: an L858P substitution (133530.0008), and a 4-bp deletion removing AGGA from nucleotide positions 1114 to 1117. The deletion created a frameshift resulting in a truncated protein of 376 amino acids.


.0010   XERODERMA PIGMENTOSUM, COMPLEMENTATION GROUP G

ERCC5, 1-BP DEL, 1491A
SNP: rs786200920, ClinVar: RCV000018043

In a patient with xeroderma pigmentosum complementation group G (XPG; 278780) reported by Arlett et al. (1980), Lalle et al. (2002) identified deletion of an adenosine from a stretch of 4 adenosines at nucleotides 1491 to 1494 of the ERCC5 gene. The resulting frameshift generated a truncated protein of 521 amino acids, the last 23 being unrelated to XPG. The other allele carried a deletion of an adenosine in a stretch of 9 adenosines (133530.0011).


.0011   XERODERMA PIGMENTOSUM, COMPLEMENTATION GROUP G

ERCC5, 1-BP DEL, 2743A
SNP: rs752661599, gnomAD: rs752661599, ClinVar: RCV000018044, RCV001194154, RCV003556040

In a patient with xeroderma pigmentosum complementation group G (XPG; 278780), Lalle et al. (2002) identified compound heterozygosity for 2 small deletions in the ERCC5 gene. One allele had deletion of an adenosine at position 1491 (133530.0010), and the other had a deletion of an adenosine in a stretch of 9 adenosines at positions 2743 to 2751 of the ERCC5 gene. The authors designated this mutation 2751delA. An intron whose splice donor and acceptor sites are noncanonical is located between the deletion and the termination codon resulting from the frameshift; the mutation caused a minor alternative splicing event that removed the first 2 nucleotides of the following exon (2880-2881del). In this patient, the combination of this splicing event and the single-nucleotide deletion at position 2751 was predicted to restore the reading frame and thereby generate an almost full-length XPG protein of 1,185, instead of 1,186, amino acids. Such a protein would contain an internal stretch of 44 unrelated amino acids.


.0012   XERODERMA PIGMENTOSUM, COMPLEMENTATION GROUP G

ERCC5, ALA874THR
SNP: rs121434576, gnomAD: rs121434576, ClinVar: RCV000018045, RCV001844013, RCV002513091

Emmert et al. (2002) reported a mildly affected 14-year-old Caucasian female with xeroderma pigmentosum complementation group G (XPG; 278780) who was compound heterozygous for 2 mutations in the ERCC5 gene: an early stop codon (Q136X; 133530.0013) and a 2817G-A transition resulting in an ala874-to-thr (A874T) substitution. The A874T mutant protein showed residual ability to complement XPG cells in vitro. The observations agreed with earlier studies demonstrating that XPG patients who retain residual functional activity in 1 allele can have mild clinical features without neurologic abnormalities. The patient had sun sensitivity but no neurologic abnormalities.


.0013   XERODERMA PIGMENTOSUM, COMPLEMENTATION GROUP G

ERCC5, GLN136TER
SNP: rs121434577, ClinVar: RCV000018046

In a mildly affected girl with xeroderma pigmentosum complementation group G (XPG; 278780), Emmert et al. (2002) identified compound heterozygosity for 2 mutations in the ERCC5 gene: a 603C-T transition in exon 4 resulting in a gln136-to-ter (Q136X) substitution and A874T (133530.0012). The A874T mutant protein retained residual activity.


.0014   XERODERMA PIGMENTOSUM, COMPLEMENTATION GROUP G

ERCC5, ALA28ASP
SNP: rs267607281, ClinVar: RCV000034376

In 2 sibs, born of unrelated Brazilian parents, with xeroderma pigmentosum complementation group G (XPG; 278780), Soltys et al. (2013) identified compound heterozygosity for 2 mutations in the ERCC5 gene: an 83C-A transversion, resulting in an ala28-to-asp (A28D) substitution at the N-endonucleolytic site, and a 2904G-C transversion, resulting in a trp968-to-cys (W968C; 133530.0015) substitution in the protein domain believed to be responsible for protein-DNA contact. In vitro functional expression studies showed that both mutant proteins were able to partially restore activity in cells lacking ERCC5 in response to UV light, but not as well as the wildtype protein. Both mutant proteins showed activity comparable to wildtype in response to oxidative stress. The patients had a relatively mild form of the disorder, with photosensitivity first apparent in infancy, but had no history of skin cancer or skin cancer precursor lesions up to ages 22 and 17 years, respectively. Patient cells showed a strong DNA repair defect in response to UV light, but not in response to oxidative stress. Soltys et al. (2013) suggested that more severe ERCC5 defects that also impair the response to oxidative stress-induced injury, usually truncating mutations, (see, e.g., 133530.0003) are associated with the more severe phenotype observed in Cockayne syndrome.


.0015   XERODERMA PIGMENTOSUM, COMPLEMENTATION GROUP G

ERCC5, TRP968CYS
SNP: rs267607280, ClinVar: RCV000034377

For discussion of the trp968-to-cys (W968C) mutation in the ERCC5 gene that was found in compound heterozygous state in patients with xeroderma pigmentosum complementation group G (XPG; 278780) by Soltys et al. (2013), see 133530.0014.


.0016   CEREBROOCULOFACIOSKELETAL SYNDROME 3

ERCC5, 1-BP DUP, 2766A
SNP: rs760232640, gnomAD: rs760232640, ClinVar: RCV000191920

In 4 fetuses, born of consanguineous Pakistani parents, with cerebrooculofacioskeletal syndrome-3 (COFS3; 616570), Drury et al. (2014) identified a homozygous 1-bp duplication (c.2766dupA) in exon 13 of the ERCC5 gene, resulting in a frameshift and premature termination (Leu923ThrfsTer7) that would eliminate the C terminus. The mutation, which was found by a combination of linkage analysis and exome sequencing, segregated with the disorder in the family. Functional studies of the variant were not performed.


REFERENCES

  1. Arlett, C. F., Harcourt, S. A., Lehman, A. R., Stevens, S., Ferguson-Smith, M. A., Morley, W. N. Studies on a new case of xeroderma pigmentosum (XP3BR) from complementation group G with cellular sensitivity to ionizing radiation. Carcinogenesis 1: 745-751, 1980. [PubMed: 11219864] [Full Text: https://doi.org/10.1093/carcin/1.9.745]

  2. Cheesbrough, M. J. Xeroderma pigmentosum--a unique variant with neurological involvement. Brit. J. Derm. 99 (Suppl. 16): 61 only, 1978. [PubMed: 698095]

  3. Cleaver, J. E., Thompson, L. H., Richardson, A. S., States, J. C. A summary of mutations in the UV-sensitive disorders: xeroderma pigmentosum, Cockayne syndrome, and trichothiodystrophy. Hum. Mutat. 14: 9-22, 1999. [PubMed: 10447254] [Full Text: https://doi.org/10.1002/(SICI)1098-1004(1999)14:1<9::AID-HUMU2>3.0.CO;2-6]

  4. Constantinou, A., Gunz, D., Evans, E., Lalle, P., Bates, P. A., Wood, R. D., Clarkson, S. G. Conserved residues of human XPG protein important for nuclease activity and function in nucleotide excision repair. J. Biol. Chem. 274: 5637-5648, 1999. [PubMed: 10026181] [Full Text: https://doi.org/10.1074/jbc.274.9.5637]

  5. Cooper, P. K., Nouspikel, T., Clarkson, S. G., Leadon, S. A. Defective transcription-coupled repair of oxidative base damage in Cockayne syndrome patients from XP group G. Science 275: 990-993, 1997. Note: Retraction: Science 308: 1740 only, 2005. [PubMed: 9020084] [Full Text: https://doi.org/10.1126/science.275.5302.990]

  6. Cooper, P. K., Nouspikel, T., Clarkson, S. G. Retraction. Science 308: 1740 only, 2005. [PubMed: 15961651] [Full Text: https://doi.org/10.1126/science.308.5729.1740b]

  7. Drury, S., Boustred, C., Tekman, M., Stanescu, H., Kleta, R., Lench, N., Chitty, L. S., Scott, R. H. A novel homozygous ERCC5 truncating mutation in a family with prenatal arthrogryposis--further evidence of genotype-phenotype correlation. Am. J. Med. Genet. 164A: 1777-1783, 2014. [PubMed: 24700531] [Full Text: https://doi.org/10.1002/ajmg.a.36506]

  8. Emmert, S., Schneider, T. D., Khan, S. G., Kraemer, K. H. The human XPG gene: gene architecture, alternative splicing and single nucleotide polymorphisms. Nucleic Acids Res. 29: 1443-1452, 2001. [PubMed: 11266544] [Full Text: https://doi.org/10.1093/nar/29.7.1443]

  9. Emmert, S., Slor, H., Busch, D. B., Batko, S., Albert, R. B., Coleman, D., Khan, S. G., Abu-Libdeh, B., DiGiovanna, J. J., Cunningham, B. B., Lee, M.-M., Crollick, J., Inui, H., Ueda, T., Hedayati, M., Grossman, L., Shahlavi, T., Cleaver, J. E., Kraemer, K. H. Relationship of neurologic degeneration to genotype in three xeroderma pigmentosum group G patients. J. Invest. Derm. 118: 972-982, 2002. Note: Erratum: J. Invest. Derm. 120: 173 only, 2003. [PubMed: 12060391] [Full Text: https://doi.org/10.1046/j.1523-1747.2002.01782.x]

  10. Gersen, S., Warburton, D., Jackson, C. L., Housman, D. Regional localization of the excision repair gene ERCC5 on chromosome 13. (Abstract) Cytogenet. Cell Genet. 51: 1003 only, 1989.

  11. Graham, J. M., Jr., Anyane-Yeboa, K., Raams, A., Appeldoorn, E., Kleijer, W. J., Garritsen, V. H., Busch, D., Edersheim, T. G., Jaspers, N. G. J. Cerebro-oculo-facio-skeletal syndrome with a nucleotide excision-repair defect and a mutated XPD gene, with prenatal diagnosis in a triplet pregnancy. Am. J. Hum. Genet. 69: 291-300, 2001. [PubMed: 11443545] [Full Text: https://doi.org/10.1086/321295]

  12. Habraken, Y., Sung, P., Prakash, L., Prakash, S. Human xeroderma pigmentosum group G gene encodes a DNA endonuclease. Nucleic Acids Res. 22: 3312-3316, 1994. [PubMed: 8078765] [Full Text: https://doi.org/10.1093/nar/22.16.3312]

  13. Habraken, Y., Sung, P., Prakash, S., Prakash, L. Transcription factor TFIIH and DNA endonuclease Rad2 constitute yeast nucleotide excision repair factor 3: implications for nucleotide excision repair and Cockayne syndrome. Proc. Nat. Acad. Sci. 93: 10718-10722, 1996. [PubMed: 8855246] [Full Text: https://doi.org/10.1073/pnas.93.20.10718]

  14. Hamel, B. C. J., Raams, A., Schuitema-Dijkstra, A. R., Simons, P., van der Burgt, I., Jaspers, N. G. J., Kleijer, W. J. Xeroderma pigmentosum-Cockayne syndrome complex: a further case. J. Med. Genet. 33: 607-610, 1996. [PubMed: 8818951] [Full Text: https://doi.org/10.1136/jmg.33.7.607]

  15. Harada, Y.-N., Matsuda, Y., Shiomi, N., Shiomi, T. Complementary DNA sequence and chromosomal localization of xpg, the mouse counterpart of human repair gene XPG/ERCC5. Genomics 28: 59-65, 1995. [PubMed: 7590748] [Full Text: https://doi.org/10.1006/geno.1995.1106]

  16. Hori, T., Shiomi, T., Sato, K. Human chromosome 13 compensates a DNA repair defect in UV-sensitive mouse cells by mouse-human cell hybridization. Proc. Nat. Acad. Sci. 80: 5655-5659, 1983. [PubMed: 6577448] [Full Text: https://doi.org/10.1073/pnas.80.18.5655]

  17. Ito, S., Kuraoka, I., Chymkowitch, P., Compe, E., Takedachi, A., Ishigami, C., Coin, F., Egly, J.-M., Tanaka, K. XPG stabilizes TFIIH, allowing transactivation of nuclear receptors: implications for Cockayne syndrome in XP-G/CS patients. Molec. Cell 26: 231-243, 2007. [PubMed: 17466625] [Full Text: https://doi.org/10.1016/j.molcel.2007.03.013]

  18. Jaeken, J., Klocker, H., Schwaiger, H., Bellmann, R., Hirsch-Kauffmann, M., Schweiger, M. Clinical and biochemical studies in three patients with severe early infantile Cockayne syndrome. Hum. Genet. 83: 339-346, 1989. [PubMed: 2478446] [Full Text: https://doi.org/10.1007/BF00291378]

  19. Keijzer, W., Jaspers, N. G. J., Abrahams, P. J., Taylor, A. M. R., Arlett, C. F., Zelle, B., Takebe, H., Kinmont, P. D. S., Bootsma, D. A seventh complementation group in excision-deficient xeroderma pigmentosum. Mutat. Res. 62: 183-190, 1979. [PubMed: 492197] [Full Text: https://doi.org/10.1016/0027-5107(79)90231-8]

  20. Lalle, P., Nouspikel, T., Constantinou, A., Thorel, F., Clarkson, S. G. The founding members of xeroderma pigmentosum group G produce XPG protein with severely impaired endonuclease activity. J. Invest. Derm. 118: 344-351, 2002. [PubMed: 11841555] [Full Text: https://doi.org/10.1046/j.0022-202x.2001.01673.x]

  21. Lee, S.-K., Yu, S.-L., Prakash, L., Prakash, S. Requirement of yeast RAD2, a homolog of human XPG gene, for efficient RNA polymerase II transcription: implications for Cockayne syndrome. Cell 109: 823-834, 2002. [PubMed: 12110180] [Full Text: https://doi.org/10.1016/s0092-8674(02)00795-x]

  22. Lehmann, A. R., Bootsma, D., Clarkson, S. G., Cleaver, J. E., McAlpine, P. J., Tanaka, K., Thompson, L. H., Wood, R. D. Nomenclature of human DNA repair genes. Mutat. Res. 315: 41-42, 1994. [PubMed: 7517009] [Full Text: https://doi.org/10.1016/0921-8777(94)90026-4]

  23. MacInnes, M. A., Dickson, J. A., Hernandez, R. R., Learmonth, D., Lin, G. Y., Mudgett, J. S., Park, M. S., Schauer, S., Reynolds, R. J., Strniste, G. F., Yu, J. Y. Human ERCC5 cDNA-cosmid complementation for excision repair and bipartite amino acid domains conserved with RAD proteins of Saccharomyces cerevisiae and Schizosaccharomyces pombe. Molec. Cell. Biol. 13: 6393-6402, 1993. [PubMed: 8413238] [Full Text: https://doi.org/10.1128/mcb.13.10.6393-6402.1993]

  24. Mudgett, J. S., MacInnes, M. A. Isolation of the functional human excision repair gene ERCC5 by intercosmid recombination. Genomics 8: 623-633, 1990. [PubMed: 2276736] [Full Text: https://doi.org/10.1016/0888-7543(90)90248-s]

  25. Norris, P. G., Hawk, J. L. M., Avery, J. A., Giannelli, F. Xeroderma pigmentosum complementation group G--report of two cases. Brit. J. Derm. 116: 861-866, 1987. [PubMed: 3620347] [Full Text: https://doi.org/10.1111/j.1365-2133.1987.tb04906.x]

  26. Nouspikel, T., Clarkson, S. G. Mutations that disable the DNA repair gene XPG in a xeroderma pigmentosum group G patient. Hum. Molec. Genet. 3: 963-967, 1994. [PubMed: 7951246] [Full Text: https://doi.org/10.1093/hmg/3.6.963]

  27. Nouspikel, T., Lalle, P., Leadon, S. A., Cooper, P. K., Clarkson, S. G. A common mutational pattern in Cockayne syndrome patients from xeroderma pigmentosum group G: implications for a second XPG function. Proc. Nat. Acad. Sci. 94: 3116-3121, 1997. Note: Retraction: Proc. Nat. Acad. Sci. 103: 19606 only, 2006. Figure 6 was retracted as part of a Voluntary Exclusion Agreement between the author Steven A. Leadon and the U.S. Department of Health and Human Services (HHS) through the Public Health Service and the Office of Research Integrity; see Notice of Findings of Scientific Misconduct from HHS (71 Federal Register 110 (June 8, 2006/Notices) pp 33308-33309). [PubMed: 9096355] [Full Text: https://doi.org/10.1073/pnas.94.7.3116]

  28. O'Donovan, A., Davies, A. A., Moggs, J. G., West, S. C., Wood, R. D. XPG endonuclease makes the 3-prime incision in human DNA nucleotide excision repair. Nature 371: 432-435, 1994. [PubMed: 8090225] [Full Text: https://doi.org/10.1038/371432a0]

  29. O'Donovan, A., Scherly, D., Clarkson, S. G., Wood, R. D. Isolation of active recombinant XPG protein, a human DNA repair endonuclease. J. Biol. Chem. 269: 15965-15968, 1994. [PubMed: 8206890]

  30. O'Donovan, A., Wood, R. D. Identical defects in DNA repair in xeroderma pigmentosum group G and rodent ERCC group 5. Nature 363: 185-188, 1993. [PubMed: 8483505] [Full Text: https://doi.org/10.1038/363185a0]

  31. Samec, S., Jones, T. A., Corlet, J., Scherly, D., Sheer, D., Wood, R. D., Clarkson, S. G. The human gene for xeroderma pigmentosum complementation group G (XPG) maps to 13q33 by fluorescence in situ hybridization. Genomics 21: 283-285, 1994. [PubMed: 8088806] [Full Text: https://doi.org/10.1006/geno.1994.1261]

  32. Sarker, A. H., Tsutakawa, S. E., Kostek, S., Ng, C., Shin, D. S., Peris, M., Campeau, E., Tainer, J. A., Nogales, E., Cooper, P. K. Recognition of RNA polymerase II and transcription bubbles by XPG, CSB, and TFIIH: insights for transcription-coupled repair and Cockayne syndrome. Molec. Cell 20: 187-198, 2005. [PubMed: 16246722] [Full Text: https://doi.org/10.1016/j.molcel.2005.09.022]

  33. Scherly, D., Nouspikel, T., Corlet, J., Ucla, C., Bairoch, A., Clarkson, S. G. Complementation of the DNA repair defect in xeroderma pigmentosum group G cells by a human cDNA related to yeast RAD2. Nature 363: 182-185, 1993. [PubMed: 8483504] [Full Text: https://doi.org/10.1038/363182a0]

  34. Shiomi, N., Kito, S., Oyama, M., Matsunaga, T., Harada, Y.-N., Ikawa, M., Okabe, M., Shiomi, T. Identification of the XPG region that causes the onset of Cockayne syndrome by using Xpg mutant mice generated by the cDNA-mediated knock-in method. Molec. Cell. Biol. 24: 3712-3719, 2004. [PubMed: 15082767] [Full Text: https://doi.org/10.1128/MCB.24.9.3712-3719.2004]

  35. Shiomi, T., Harada, Y., Saito, T., Shiomi, N., Okuno, Y., Yamaizumi, M. An ERCC5 gene with homology to yeast RAD2 is involved in group G xeroderma pigmentosum. Mutat. Res. 314: 167-175, 1994. [PubMed: 7510366] [Full Text: https://doi.org/10.1016/0921-8777(94)90080-9]

  36. Siciliano, M. J., Bachinski, L., Dolf, G., Carrano, A. V., Thompson, L. H. Chromosomal assignments of human DNA repair genes that complement Chinese hamster ovary (CHO) cell mutants. (Abstract) Cytogenet. Cell Genet. 46: 691-692, 1987.

  37. Soltys, D. T., Rocha, C. R. R., Lerner, L. K., de Souza, T. A., Munford, V., Cabral, F., Nardo, T., Stefanini, M., Sarasin, A., Cabral-Neto, J. B., Menck, C. F. M. Novel XPG (ERCC5) mutations affect DNA repair and cell survival after ultraviolet but not oxidative stress. Hum. Mutat. 34: 481-489, 2013. [PubMed: 23255472] [Full Text: https://doi.org/10.1002/humu.22259]

  38. Takahashi, E., Shiomi, N., Shiomi, T. Precise localization of the excision repair gene, ERCC5, to human chromosome 13q32.3-q33.1 by direct R-banding fluorescence in situ hybridization. Jpn. J. Cancer Res. 83: 1117-1119, 1992. [PubMed: 1483924] [Full Text: https://doi.org/10.1111/j.1349-7006.1992.tb02731.x]

  39. Thompson, L. H., Carrano, A. V., Sato, K., Salazar, E. P., White, B. F., Stewart, S. A., Minkler, J. L., Siciliano, M. J. Identification of nucleotide-excision-repair genes on human chromosomes 2 and 13 by functional complementation in hamster-human hybrids. Somat. Cell Molec. Genet. 13: 539-551, 1987. [PubMed: 3477874] [Full Text: https://doi.org/10.1007/BF01534495]

  40. Vermeij, W. P., Dolle, M. E. T., Reiling, E., Jaarsma, D., Payan-Gomez, C., Bombardieri, C. R., Wu, H., Roks, A. J. M., Botter, S. M., van der Eerden, B. C., Youssef, S. A., Kuiper, R. V., and 12 others. Restricted diet delays accelerated ageing and genomic stress in DNA-repair-deficient mice. Nature 537: 427-431, 2016. [PubMed: 27556946] [Full Text: https://doi.org/10.1038/nature19329]

  41. Vermeulen, W., Jaeken, J., Jaspers, N. G. J., Bootsma, D., Hoeijmakers, J. H. J. Xeroderma pigmentosum complementation group G associated with Cockayne syndrome. Am. J. Hum. Genet. 53: 185-192, 1993. [PubMed: 8317483]

  42. Volker, M., Mone, M. J., Karmakar, P., van Hoffen, A., Schul, W., Vermeulen, W., Hoeijmakers, J. H. J., van Driel, R., van Zeeland, A. A., Mullenders, L. H. F. Sequential assembly of the nucleotide excision repair factors in vivo. Molec. Cell 8: 213-224, 2001. [PubMed: 11511374] [Full Text: https://doi.org/10.1016/s1097-2765(01)00281-7]

  43. Warburton, D., Yu, M.-T., Richardson, C., Mudgett, J. S., MacInnes, M. A. Human excision repair gene ERCC5 maps to 13q32-q33 by in situ hybridization and also cross-hybridizes to 10q11, the site of ERCC6. (Abstract) Cytogenet. Cell Genet. 58: 1984 only, 1991.

  44. Zafeiriou, D. I., Thorel, F., Andreou, A., Kleijer, W. J., Raams, A., Garritsen, V. H., Gombakis, N., Jaspers, N. G. J., Clarkson, S. G. Xeroderma pigmentosum group G with severe neurological involvement and features of Cockayne syndrome in infancy. Pediat. Res. 49: 407-412, 2001. [PubMed: 11228268] [Full Text: https://doi.org/10.1203/00006450-200103000-00016]


Contributors:
Ada Hamosh - updated : 09/28/2016
Cassandra L. Kniffin - updated : 9/23/2015
Cassandra L. Kniffin - updated : 4/2/2013
Cassandra L. Kniffin - reorganized : 7/16/2007
Patricia A. Hartz - updated : 11/22/2005
Ada Hamosh - updated : 7/20/2005
Patricia A. Hartz - updated : 6/25/2004
Gary A. Bellus - updated : 4/30/2003
Anne M. Stumpf - updated : 4/25/2003
Stylianos E. Antonarakis - updated : 7/31/2002
Victor A. McKusick - updated : 8/30/2001
Stylianos E. Antonarakis - updated : 8/3/2001
Ada Hamosh - updated : 4/26/2001
Victor A. McKusick - updated : 7/21/1999
Victor A. McKusick - updated : 5/13/1997
Victor A. McKusick - updated : 2/13/1997

Creation Date:
Victor A. McKusick : 9/2/1987

Edit History:
carol : 09/16/2022
carol : 03/19/2020
carol : 03/18/2020
carol : 09/11/2017
alopez : 09/28/2016
carol : 08/11/2016
alopez : 09/25/2015
ckniffin : 9/23/2015
mcolton : 6/3/2015
carol : 4/6/2015
mcolton : 3/30/2015
alopez : 3/10/2014
alopez : 4/5/2013
ckniffin : 4/2/2013
alopez : 11/13/2012
carol : 5/10/2012
carol : 12/3/2010
carol : 1/12/2010
carol : 7/16/2007
ckniffin : 7/16/2007
ckniffin : 7/6/2007
alopez : 2/12/2007
alopez : 2/12/2007
alopez : 2/12/2007
wwang : 11/29/2005
terry : 11/22/2005
alopez : 7/20/2005
terry : 7/20/2005
terry : 7/19/2005
ckniffin : 6/15/2005
alopez : 7/8/2004
mgross : 6/29/2004
terry : 6/25/2004
joanna : 3/17/2004
carol : 11/5/2003
terry : 6/9/2003
alopez : 4/30/2003
alopez : 4/25/2003
alopez : 4/25/2003
mgross : 7/31/2002
cwells : 9/20/2001
cwells : 9/12/2001
terry : 8/30/2001
mgross : 8/3/2001
alopez : 5/8/2001
terry : 4/26/2001
terry : 7/21/1999
terry : 8/3/1998
terry : 5/29/1998
alopez : 7/7/1997
jenny : 5/13/1997
alopez : 5/9/1997
alopez : 5/8/1997
terry : 5/7/1997
mark : 2/13/1997
terry : 2/13/1997
jamie : 12/6/1996
terry : 12/3/1996
mark : 12/12/1995
terry : 12/8/1995
mark : 8/17/1995
carol : 1/6/1995
mimadm : 9/24/1994
terry : 7/25/1994
jason : 6/7/1994
warfield : 4/8/1994