Polymerization sites in the D-domain of human fibrin(ogen)

被引：2
|
作者：
Lugovskoy, EV [1 ]
Zolotareva, EN [1 ]
Gogolinskaya, GK [1 ]
Gritsenko, PG [1 ]
Moroz, ED [1 ]
Komisarenko, SV [1 ]
机构：
[1] Ukrainian Acad Sci, AV Palladin Biochem Inst, UA-01601 Kiev, Ukraine
来源：
BIOCHEMISTRY-MOSCOW | 2002年 / 67卷 / 04期
关键词：
fibrin(ogen); D-domain; polymerization sites;
D O I：
10.1023/A:1015286007162
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
The present work deals with localization of previously unknown polymerization sites of the fibrin DD-fragment. D-dimer we obtained has a pronounced inhibitory effect on fibrin polymerization (IC50 = 0.06 muM). The inhibitory effect of the D-fragment disappeared after reduction and carboxymethylation. However, polypeptide chains beta(DD) (Bbeta134-461) and gammagamma(DD) (gamma63-411)(2) of the DD-fragment, isolated by preparative electrophoresis, displayed their inhibitory activity, For instance, the rates of fibrin protofibril lateral association were decreased twice in the presence of beta(DD) and gammagamma(DD) chains at their molar ratios to fibrin of 0.40 and 0.15, respectively. The IC50 values for beta(DD) and gammagamma(DD) were 0.24 and 0,10 muM, respectively. Highly specific inhibition of protofibril lateral association suggests that the protofibril lateral association sites are located in Bbeta134-461 and gamma63-411 regions of the fibrin D-domain. Our data confirm those reported by Doolittle et al. regarding the gamma-chain and a hypothesis about beta-chain of fibrin D-domain (Yang, Z., Mochalkin, I., and Doolittle, R. F (2000) Biochemistry, 97, 14156-14161).
引用
收藏
页码：446 / 450
页数：5
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