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通过N-WASP和TOCA-1相互作用,TmeA促进了基座的形成

Alix McCullough¹, C A Jabeena¹, Brianna Steiert^1,2

¹Department of Microbiology and Immunology, University of Iowa Carver College of Medicine, Iowa City, IA, USA.

bioRxiv : the preprint server for biology

|November 18, 2024

概括

甲状腺菌使用其T3SS效应器TmeA通过模仿Cdc42和激活N-WASP来入侵宿主细胞. TmeA还与TOCA-1相互作用,这两者都对细菌在入侵过程中形成基座至关重要.

科学领域:

微生物学微生物学
细胞生物学细胞生物学
传染性疾病传染性疾病

背景情况:

甲状腺炎 (C.t.) 的感染. 是一种有义务的细胞内细菌,引起人类疾病,如克拉米迪亚和气管瘤.
细菌的入侵,对于致病的产生至关重要,是通过CT促进的. 的第三类分泌系统 (T3SS) 效应器,操纵宿主活性蛋白调节.

研究的目的:

阐明N-WASP CRIB域在TmeA介导的C.t.中的作用. 这是一次入侵.
识别和描述参与TmeA介导入侵和基座形成的其他宿主因素.

主要方法:

生物化学测试以确定TmeA与N-WASP和TOCA-1的相互作用.
通过siRNA介导的N-WASP和TOCA-1的淘汰.
传输电子显微镜可视化CT诱导的足台形成.

主要成果:

TmeA与N-WASP直接相互作用,模仿Cdc42激活N-WASP,随后激活Arp2/3复合体.
此外,TmeA还与宿主蛋白TOCA-1直接相互作用.
N-WASP和TOCA-1都对CT介导的基座形成至关重要,这一过程对细菌入侵至关重要.

结论:

TmeA采用了一种独特的入侵机制,通过直接接触N-WASP和TOCA-1.
这种相互作用促进了由actin驱动的基座形成,增强CT. 进入宿主细胞.

关键词:

克拉米迪亚菌落状虫病 (chlamydia trachomatis) 是一种感染性疾病.在 N-WASP 系统中,这就是T3SS.这是TOCA-1的代谢.时间时间时间这是入侵的入侵.一个脚,一个基座.

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