Serine protease autotransporters of enterobacteriaceae (SPATEs): biogenesis and function.

Serine protease autotransporters of enterobacteriaceae (SPATEs): biogenesis and function.
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DOI:
10.3390/toxins2061179
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发表时间:
2010-06
期刊:
影响因子:
4.2
通讯作者:
Dautin N
Dautin N
中科院分区:
医学2区
文献类型:
--
作者:
Dautin N

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肠杆菌科丝氨酸蛋白酶自转运蛋白(SPATEs)是由大肠杆菌和志贺氏菌分泌的蛋白酶大家族。SPATE表现出两种不同的蛋白水解活性。首先,C-末端催化位点触发分子内裂解,在细胞外介质中释放这些蛋白质的N-末端部分。其次,SPATE的分泌N-末端结构域本身是蛋白酶;每个结构域都含有一个典型的丝氨酸蛋白酶催化位点。这些分泌的蛋白酶中的一些是毒素,引起对哺乳动物细胞的各种影响。在这里,我们讨论的生物成因SPATE和它们的功能作为毒素。
Serine Protease Autotransporters of Enterobacteriaceae (SPATEs) constitute a large family of proteases secreted by Escherichia coli and Shigella. SPATEs exhibit two distinct proteolytic activities. First, a C-terminal catalytic site triggers an intra-molecular cleavage that releases the N-terminal portion of these proteins in the extracellular medium. Second, the secreted N-terminal domains of SPATEs are themselves proteases; each contains a canonical serine-protease catalytic site. Some of these secreted proteases are toxins, eliciting various effects on mammalian cells. Here, we discuss the biogenesis of SPATEs and their function as toxins.
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