Determination of the disulfide bridges in factor Va heavy chain.
Determination of the disulfide bridges in factor Va heavy chain.
复制标题
因子 Va 重链中二硫键的测定。
DOI:
10.1021/bi00248a021
复制
发表时间:
1994
期刊:
影响因子:
2.9
通讯作者:
Mann,KG
中科院分区:
文献类型:
--
作者:
Xue,J;Kalafatis,M;Silveira,JR;Kung,C;Mann,KG
Revised Manuscript Received June 29, 1994® abstract: The M,= 94 000 heavy chain of bovine factor Va contains 10 cysteine residues which are distributed in the 2 A domains which make up this portion of the factor V molecule. The Al domain contains four cysteines while the A2 domain containssix cysteines. The locations of disulfide bridgesand free cysteines in bovine factor Va heavy chain were analyzed using iodo [14C] acetamide-labeled factor Va heavy chain digested with trypsin, plasmin, V-8 protease, and cyanogen bromide. Following HPLC separation of the resulting peptides, freecysteines were identified by the incorporation of radioactivity while disulfidecontaining peptides were detected using an SBD-F fluorometric assay after reduction. All cysteine-containing peptides were analyzed by amino acid sequence analysis. The four cysteines in the A1 domain are associated with two disulfide bonds, Cysi39-Cysi65 and Cys22o-Cys3oi. One disulfide bond was explicitly identified in the A2 domain; Cys47i-Cys497, and a free cysteine was found in the A2 domain at Cys53s. Significant difficulties were encountered in preparingidentifiable or soluble peptides which wouldpermit the explicit identification of the three remaining cysteines in the A2 domain. On the basis of homology, it is likely thatCyssgg is a free SH while a disulfide bridge exists between Cys579 and Cys660'Thus, three major disulfide bonding patterns, characterized as “a”,“0”, and “7” loops, are found in factor V. Each A domain contains a 26 residue “a loop at positions 139-165,471-497, and 1684-1710. The Al and A2 domains each contain 81 amino acid residue “/3” loops at 220-301 and 579-660. The C domains contain 2 “7” loops of 154 (Cl) and 155 (C2) residues, respectively, 1866-2020 and 2025-2180.
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影响因子:
--
作者:
M. Hunkapiller;R. Hewick;W. Dreyer;L. Hood
通讯作者:
L. Hood
影响因子:
--
作者:
P. Böhlen
通讯作者:
P. Böhlen
影响因子:
5.6
作者:
Stephen Poole;R. Firtel;Elise Lamar;W. Rowekamp
通讯作者:
W. Rowekamp
DOI:
--
发表时间:
1974
期刊:
Biochimica et Biophysica Acta
影响因子:
--
作者:
Anders Björklind;Hans Jörnvall
通讯作者:
Hans Jörnvall
影响因子:
4.8
作者:
M. Nesheim;K. Myrmel;L. Hibbard;K. Mann
通讯作者:
K. Mann