Anaplasma phagocytophilum and Ehrlichia chaffeensis type IV secretion and Ank proteins.

Anaplasma phagocytophilum and Ehrlichia chaffeensis type IV secretion and Ank proteins.
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DOI:
10.1016/j.mib.2009.12.008
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发表时间:
2010-02
影响因子:
5.4
通讯作者:
Lin, Mingqun
Lin, Mingqun
中科院分区:
生物学2区
文献类型:
--
作者:
Rikihisa, Yasuko;Lin, Mingqun

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胞内致病菌无原体和埃立克体通过劫持宿主细胞成分和过程感染白细胞。IV型分泌系统在感染期间上调。在IV型分泌候选底物中,吞噬细胞无原体的锚蛋白重复蛋白AnkA通过包含VirD4的复合物被递送到宿主细胞质中。AnkA是高度酪氨酸磷酸化的,并与Abl相互作用物1、SHP-1和核DNA片段结合。最近有报道称沙菲埃立体AnkA易位进入宿主细胞核。最近发现的几种通过不同细胞内细菌的IV型分泌系统分泌的锚蛋白重复蛋白表明,进化出一种共同的策略来破坏宿主细胞功能。
The obligatory intracellular bacterial pathogens Anaplasma and Ehrlichia infect leukocytes by hijacking host-cell components and processes. The type IV secretion system is up-regulated during infection. Among type IV secretion candidate substrates, an ankyrin repeat protein of Anaplasma phagocytophilum, AnkA, is delivered into the host cytoplasm via a complex that includes VirD4. AnkA is highly tyrosine-phosphorylated and binds to the Abl interactor 1, SHP-1, and nuclear DNA fragments. Ehrlichia chaffeensis AnkA was recently reported to be translocated into host cell nucleus. The recent discovery of several ankyrin repeat proteins secreted via the type IV secretion system of different intracellular bacteria suggests that a common strategy evolved to subvert host-cell functions.
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发表时间: 2006-02
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影响因子: 4.5
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