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
中科院分区:
文献类型:
--
作者:
Rikihisa, Yasuko;Lin, Mingqun
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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