Novel insights into structure and function of factor XIIIa-inhibitor tridegin.

Novel insights into structure and function of factor XIIIa-inhibitor tridegin.
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对 XIIIa 因子抑制剂 tridegin 结构和功能的新见解

DOI:
10.1021/jm501058g
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发表时间:
2014
影响因子:
7.3
通讯作者:
Biswas
Biswas
中科院分区:
医学1区
文献类型:
--
作者:
Bäuml;Hardes;Steinmetzer;Roeser;Schaub;Biswas

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抑制血液凝固的最后一步,即因子 XIIIa (FXIIIa) 催化的纤维蛋白单体交联,目前仍然是药物化学中的一个挑战。我们报告了 tridegin 的合成、重组表达、二硫键连接和生物活性,tridegin 是唯一存在的对 FXIIIa 具有抑制活性的肽代表。这种 66 聚体富含半胱氨酸的肽对酶的抑制是由其 C 端序列介导的,而 N 端部分包含结构信息并有助于抑制剂结合。所检查的任何一种生产策略都会导致不同二硫桥异构体的形成,表明抑制活性需要正确的折叠。分子建模和对接研究证实了二硫键异构体在与 FXIIIa 结合方面的偏好,反过来,酶-抑制剂相互作用的知识可能会为设计用于解决 FXIIIa 的合适先导结构提供全面的想法。
The inhibition of the final step in blood coagulation, the factor XIIIa (FXIIIa) catalyzed cross-linking of fibrin monomers, is currently still a challenge in medicinal chemistry. We report synthesis, recombinant expression, disulfide connectivity, and biological activity of tridegin, the sole existing peptide representative displaying inhibitory activity on FXIIIa. Inhibition of the enzyme by this 66-mer cysteine-rich peptide is mediated by its C-terminal sequence, while the N-terminal part comprises structural information and contributes to inhibitor binding. Either of the production strategies examined leads to the formation of different disulfide-bridged isomers indicating the requirement of the correct fold for inhibitory activity. Molecular modeling and docking studies confirm disulfide bond isomer preference with respect to binding to FXIIIa, in turn, the knowledge of the enzyme–inhibitor interactions might bring about comprehensive ideas for the design of a suitable lead structure for addressing FXIIIa.
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发表时间: 2012-02
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