Human factor XIa cleaves fibrinogen: effects on structure and function.
Human factor XIa cleaves fibrinogen: effects on structure and function.
复制标题
人源因子 XIa 裂解纤维蛋白原:对结构和功能的影响。
DOI:
10.1016/0003-9861(86)90025-1
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发表时间:
1986
影响因子:
3.9
通讯作者:
Colman,RW
中科院分区:
文献类型:
--
作者:
Scott,CF;Mentzer,RL;Budzynski,AZ;Colman,RW
Factor XIa, the enzymatic form of the factor XI zymogen, is generated as a result of factor XII-dependent surface activation in plasma. Factor XIa degrades high molecular weight kininogen, its cofactor for activation (which binds factor XIa to the surface), as well as cleaves and activates coagulation factor IX. In this report, we present evidence that factor XIa can also cleave fibrinogen and decrease the thrombin-catalyzed formation of the fibrin clot. Furthermore, the products of factor XIa-digested fibrinogen markedly inhibited the rate of polymerization of fibrin monomers. Factor XIa initially cleaved the Aα-chain of fibrinogen and subsequently degraded the Bβ-chain. However, the cleavage sites on both chains were distinct from those susceptible to thrombin. The γ-chain was degraded only after prolonged incubation with factor XIa. Furthermore, the profile of fibrinogen proteolysis by factor XIa was distinctly different from that of plasmin-catalyzed fibrinogenolysis. Unlike plasmin, factor XIa was not able to cleave the NH2-terminus of the Bβ-chain of fibrinogen. Moreover, factor XIa, unlike plasmin, failed to hydrolyze fibrin. Further study of the proteolytic digests of fibrinogen produced by factor XIa may give additional insight into the mechanism of polymerization of this protein.
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影响因子:
20.3
作者:
Scott,CF;Sinha,D;Seaman,FS;Walsh,PN;Colman,RW
通讯作者:
Colman,RW
影响因子:
4.8
作者:
A. Budzynski;V. Marder;J. Shainoff
通讯作者:
J. Shainoff
影响因子:
15.9
作者:
N. Alkjaersig;A. Fletcher;S. Sherry
通讯作者:
S. Sherry
DOI:
--
发表时间:
1970
期刊:
Biochimica et Biophysica Acta
影响因子:
--
作者:
W. Holleman;L. Coen
通讯作者:
L. Coen
DOI:
--
发表时间:
1952
期刊:
Biochimica et Biophysica Acta
影响因子:
--
作者:
Bettelheim Fr;K. Bailey
通讯作者:
K. Bailey