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链激酶及其他纤溶酶原激活剂与纤溶酶原和纤维蛋白相互作用的动力学研究。

Kinetic studies on the interaction of streptokinase and other plasminogen activators with plasminogen and fibrin.

作者信息

Fears R, Hibbs M J, Smith R A

出版信息

Biochem J. 1985 Jul 15;229(2):555-8. doi: 10.1042/bj2290555.

DOI:10.1042/bj2290555
PMID:4041182
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC1145091/
Abstract

The activation of Lys-plasminogen to plasmin by streptokinase was promoted by soluble fibrin such that Km was decreased and Vmax. increased. Enhancement was also observed when Glu-plasminogen was the substrate and was shared by the preformed streptokinase-plasminogen activator complex, indicating that the stimulation was not exerted primarily on the rate of active site formation.

摘要

可溶性纤维蛋白可促进链激酶将赖氨酸纤溶酶原激活为纤溶酶,从而使米氏常数(Km)降低,最大反应速度(Vmax)增加。当以谷氨酸纤溶酶原为底物时也观察到增强作用,且这种增强作用由预先形成的链激酶 - 纤溶酶原激活剂复合物共同介导,这表明该刺激作用并非主要作用于活性位点的形成速率。

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本文引用的文献

1
Fibrinogen-fibrin conversion. The mechanism of fibrin-polymer formation in solution.纤维蛋白原-纤维蛋白转化。溶液中纤维蛋白聚合物形成的机制。
Biochem J. 1980 Jan 1;185(1):1-11. doi: 10.1042/bj1850001.
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The thrombolytic activity of streptokinase in the rabbit.链激酶在兔体内的溶栓活性。
Thromb Haemost. 1981 Aug 28;46(2):535-7.
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Fibrinolysis with acyl-enzymes: a new approach to thrombolytic therapy.酰基酶介导的纤维蛋白溶解:溶栓治疗的新方法。
Nature. 1981 Apr 9;290(5806):505-8. doi: 10.1038/290505a0.
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Enhancement of the streptokinase-catalyzed activation of human plasminogen by human fibrinogen and its plasminolysis products.人纤维蛋白原及其纤溶产物对链激酶催化的人纤溶酶原激活的增强作用。
Biochemistry. 1982 Feb 16;21(4):721-8. doi: 10.1021/bi00533a021.
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Kinetics of the activation of plasminogen by human tissue plasminogen activator. Role of fibrin.人组织型纤溶酶原激活物激活纤溶酶原的动力学。纤维蛋白的作用。
J Biol Chem. 1982 Mar 25;257(6):2912-9.
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