Cloning of cDNAs coding for the heavy chain region and connecting region of human factor V, a blood coagulation factor with four types of internal repeats
- 1 October 1987
- journal article
- Published by American Chemical Society (ACS) in Biochemistry
- Vol. 26 (20), 6508-6514
- https://doi.org/10.1021/bi00394a033
Abstract
Human factor V is a high molecular weight plasma glycoprotein that participates as a cofactor in the conversion of prothrombin to thrombin by factor Xa. Prior to its participation in the coagulation cascade, factor V is converted to factor Va by thrombin generating a heavy chain and a light chain, and these two chains are held together by calcium ions. A connecting region originally located between the heavy and light chains is liberated during the activation reaction. In a previous study, a cDNA of 2970 nucleotides that codes for the carboxyl-terminal 938 amino acids of factor V was isolated and characterized from a Hep G2 cDNA library [Kane, W. H., & Davie, E. W. (1986) Proc. Natl. Acad. Sci. U.S.A. 83, 6800-6804]. This cDNA has been used to obtain additional clones from Hep G2 and human liver cDNA libraries. Furthermore, a Hep G2 cDNA library prepared with an oligonucleotide from the 5' end of these cDNAs was screened to obtain overlapping cDNA clones that code for the amino-terminal region of the molecule. The composite sequence of these clones spans 6911 nucleotides and is consistent with the size of the factor V message present in Hep G2 cells (approximately 7 kilobases). The cDNA codes for a leader sequence of 28 amino acids and a mature protein of 2196 amino acids. The amino acid sequence predicted from the cDNA was in complete agreement with 139 amino acid residues that were identified by Edman degradation of cyanogen bromide peptides isolated from the heavy chain region and connecting region of plasma factor V.(ABSTRACT TRUNCATED AT 250 WORDS)Keywords
This publication has 37 references indexed in Scilit:
- Point mutations define a sequence flanking the AUG initiator codon that modulates translation by eukaryotic ribosomesCell, 1986
- Signal sequences: The limits of variationJournal of Molecular Biology, 1985
- Molecular cloning of a cDNA encoding human antihaemophilic factorNature, 1984
- Structure of human factor VIIINature, 1984
- Characterization of the human factor VIII geneNature, 1984
- Patterns of Amino Acids near Signal‐Sequence Cleavage SitesJBIC Journal of Biological Inorganic Chemistry, 1983
- Molecular weight of undegraded plasma factor VBiochemistry, 1981
- Screening λgt Recombinant Clones by Hybridization to Single Plaques in SituScience, 1977
- The activation of factor V by factor Xa or α-chymotrypsin and comparison with thrombin and RVV-V action. An improved factor V isolation procedureBiochemistry, 1976
- Bovine factor X1a (activated Stuart factor). Evidence of homology with mammalian serine proteasesBiochemistry, 1972