Gene: [05q3/F12] coagulation factor XII (Hageman factor); Hageman clotting factor deficiency;

COM

The F12 gene location in chr 5q is determined by hybridization of the genomic DNA from somatic hybrid cells with the gene-specific DNA probes and by in situ hybridization on chromosomes."

HIS

Until gene-specific DNA probe cloning location of this gene had remained under discussion during almost 10 years. Two alternative suggestions about F12 location in chr 7q or 6p were rejected and its location in chr 5q was definitely proved."

GEN

The gene length: 12 kb. Exons: 14. Introns: 13. The most of exons
(3-14) are divided by short introns (80-554 bp) and span only about 1/3 of the gene length (4.2 kb). Typical promotor sites (TATA and CAAT) are absent (Cool-1987)."

FUN

Activates clotting factors VIII and XI, plasminogen and prekallikrein. Cleaves selectively Arg-Ile bonds in factor VII to form factor VIIa and factor XI to form factor XIa."

MOP

Prepropeptide contains 596 amino acids. It is subjected to glycosylation and to other posttranslation modifications forming light and heavy subunits, which are united in a proenzyme and are subjected to further conversion up to the beta and alpha peptides of the clotting factor XIIa."

PAT

The F12 deficiency does not charactarized by specific clinical clinical manifestations. However, the rare familial cases with mild bleeding tendency and cerebral hemorrhage have been described."

FOG

The recessive forms are typical but some dominant familial cases have been described."

REF

PAT,PHE,FOG "Bennett B &: Blood, 40, 412-415, 1972
GEN,POL "Bernardi F &: Blood, 69, 1421-1424, 1987
LOC,CYG,MOL "Citarella F &: Hum Genet, 80, 397-398, 1988
LOC,CYG,MOL "Citarella F &: CCG, 46, (HGM9), 593, 1987
GEN,MOP "Cool DE, MacGillivray RTA: JBC, 262, N28, 13662-13673, 1987
PRO,SEQ,EXP,MOP "Cool DE &: JBC, 260, N25, 13666-13676, 1985
PAT,PHE,FOG "Egeberg O: Thromb Diath Haemorrah, 23, 432-440, 1970
PEP,STR,EVO "Fujikawa K, McMullen: JBC, 258, N18, 10924-10933, 1983
PAT,PHE,FOG "Gordon EM &: Ann Int Med, 95, 697-700, 1981
PAT,PHE,FOG "Lucia JG &: Thromb Haemost, 42, 1009-1017, 1979
PEP,STR,EVO "McMullen, Fujikawa: JBC, 260, N9, 5328-5341, 1983
PRO,SEQ,EXP,MOP "Que BG, Davie: Biochemistry, 25, 1525-1528, 1986
PAT,PHE,FOG "Ratnoff OD: Thromb Haemost, 43, 95-98, 1980
LOC,CYG,MOL "Riddell DC &: CCG, 46, (HGM9), 682, 1987
LOC,CYG,MOL "Royle NJ &: Somat Cell Mol Genet, 14, N2, 217-221, 1988
PAT,MUT "Schloesser M &: Hum Mol Genet, 4, 1235-1237, 1995
PRO,SEQ,EXP,MOP "Tripodi M &: NAR, 14, N7, 3146, 1986

SWI

SWISSPROT: P00748

KEY

hem, clot

CLA

coding, basic

LOC

05 q33-t

MIM

MIM: 234000

EZN

ENZYME: 3.4.21.38

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