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Genetic distribution, characterization, and function of Escherichia coli type III secretion system 2 (ETT2)

文献类型： 外文期刊

作者： Wang, Xinyu 1 ; Zhu, Hong 1 ; Hu, Jiangang 1 ; Zhang, Beibei 1 ; Guo, Weiqi 1 ; Wang, Zhiyang 1 ; Wang, Di 1 ; Qi, Jingjing 1 ; Tian, Mingxing 1 ; Bao, Yanqing 1 ; Si, Fusheng 2 ; Wang, Shaohui 1 ;

作者机构： 1.Chinese Acad Agr Sci CAAS, Shanghai Vet Res Inst, Shanghai 200241, Peoples R China

2.Shanghai Acad Agr Sci, Inst Anim Sci & Vet Med, Shanghai 201106, Peoples R China

期刊名称：ISCIENCE （ 影响因子：5.8； 五年影响因子：5.8 ）

ISSN：

年卷期： 2024 年 27 卷 5 期

页码：

收录情况： SCI

摘要： Many Gram-negative bacteria use type III secretion system (T3SS) to inject effector proteins and subvert host signaling pathways, facilitating the growth, survival, and virulence. Notably, some bacteria harbor multiple distinct T3SSs with different functions. An extraordinary T3SS, the Escherichia coli Type III Secretion System 2 (ETT2), is widespread among Escherichia coli ( E. coli ) strains. Since many ETT2 carry genetic mutations or deletions, it is thought to be nonfunctional. However, increasing studies highlight ETT2 contributes to E. coli pathogenesis. Here, we present a comprehensive overview of genetic distribution and characterization of ETT2. Subsequently, we outline its functional potential, contending that an intact ETT2 may retain the capacity to translocate effector proteins and manipulate the host's innate immune response. Given the potential zoonotic implications associated with ETT2-carrying bacteria, further investigations into the structure, function and regulation of ETT2 are imperative for comprehensive understanding of E. coli pathogenicity and the development of effective control strategies.

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