title: Complete cDNA and derived amino acid sequence of human factor V.
abstract: cDNA clones encoding human factor V have been isolated from an oligo(dT)-primed human fetal liver cDNA library prepared with vector Charon 21A. The cDNA sequence of factor V from three overlapping clones includes a 6672-base-pair (bp) coding region, a 90-bp 5' untranslated region, and a 163-bp 3' untranslated region within which is a poly(A) tail. The deduced amino acid sequence consists of 2224 amino acids inclusive of a 28-amino acid leader peptide. Direct comparison with human factor VIII reveals considerable homology between proteins in amino acid sequence and domain structure: a triplicated A domain and duplicated C domain show approximately equal to 40% identity with the corresponding domains in factor VIII. As in factor VIII, the A domains of factor V share approximately 40% amino acid-sequence homology with the three highly conserved domains in ceruloplasmin. The B domain of factor V contains 35 tandem and approximately 9 additional semiconserved repeats of nine amino acids of the form Asp-Leu-Ser-Gln-Thr-Thr/Asn-Leu-Ser-Pro and 2 additional semiconserved repeats of 17 amino acids. Factor V contains 37 potential N-linked glycosylation sites, 25 of which are in the B domain, and a total of 19 cysteine residues.
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D002570:Ceruloplasmin / Q000235:genetics; D004247:DNA / Q000235:genetics; D005165:Factor V / Q000235:genetics*; D005169:Factor VIII / Q000235:genetics; D005822:Genetic Vectors; D006801:Humans; D008099:Liver / Q000032:analysis; D012689:Sequence Homology, Nucleic Acid
chemical_list: D005165:Factor V; D005169:Factor VIII; D004247:DNA; D002570:Ceruloplasmin