Structure and regulation of the type VI secretion system.

Structure and regulation of the type VI secretion system.
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DOI:
10.1146/annurev-micro-121809-151619
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发表时间:
2012
影响因子:
10.5
通讯作者:
Mougous JD
Mougous JD
中科院分区:
生物学1区
文献类型:
--
作者:
Silverman JM;Brunet YR;Cascales E;Mougous JD

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VI型分泌系统(T6SS)是一种复杂且广泛的革兰氏阴性输出途径,其具有将蛋白质效应物易位到多种靶细胞类型中的能力。目前的结构模型的T6 SS表明,该装置是由至少两个复合物,一个动态的噬菌体样结构和细胞的跨膜相关的组件。这些复合物如何相互作用以促进效应物分泌和细胞靶向仍然是该领域的主要问题。作为具有特定细胞靶点的接触依赖性途径,T6SS受到严格调控。因此,控制T6S表达的调控元件的鉴定继续塑造我们对与其功能相关的环境条件的理解。本文综述了T6S结构和调控的最新进展。
The type VI secretion system (T6SS) is a complex and widespread gram-negative export pathway with the capacity to translocate protein effectors into a diversity of target cell types. Current structural models of the T6SS indicate that the apparatus is composed of at least two complexes, a dynamic bacteriophage-like structure and a cell envelope-spanning membrane-associated assembly. How these complexes interact to promote effector secretion and cell targeting remains a major question in the field. As a contact-dependent pathway with specific cellular targets, the T6SS is subject to tight regulation. Thus, the identification of regulatory elements that control T6S expression continues to shape our understanding of the environmental circumstances relevant to its function. This review discusses recent progress toward characterizing T6S structure and regulation.
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