Structural basis of evasion of cellular adaptive immunity by HIV-1 Nef.
Structural basis of evasion of cellular adaptive immunity by HIV-1 Nef.
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DOI:
10.1038/nsmb.2328
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发表时间:
2012-06-17
影响因子:
16.8
通讯作者:
Xiong, Yong
中科院分区:
文献类型:
--
作者:
Jia, Xiaofei;Singh, Rajendra;Homann, Stefanie;Yang, Haitao;Guatelli, John;Xiong, Yong
The HIV-1 Nef protein associates with the cytoplasmic domain of class I MHC and with the μ1 subunit of clathin adaptor protein complex I, rerouting MHC I to the endolysosomal degradation pathway. The molecular mechanism for this effect is now revealed by the crystal structure of Nef together with MHC I and a domain from μ1. The online version of this article (doi:10.1038/nsmb.2328) contains supplementary material, which is available to authorized users. The HIV-1 protein Nef inhibits antigen presentation by class I major histocompatibility complex (MHC-I). We determined the mechanism of this activity by solving the crystal structure of a protein complex comprising Nef, the MHC-I cytoplasmic domain (MHC-I CD) and the μ1 subunit of the clathrin adaptor protein complex 1. A ternary, cooperative interaction clamps the MHC-I CD into a narrow binding groove at the Nef-μ1 interface, which encompasses the cargo-recognition site of μ1 and the proline-rich strand of Nef. The Nef C terminus induces a previously unobserved conformational change in μ1, whereas the N terminus binds the Nef core to position it optimally for complex formation. Positively charged patches on μ1 recognize acidic clusters in Nef and MHC-I. The structure shows how Nef functions as a clathrin-associated sorting protein to alter the specificity of host membrane trafficking and enable viral evasion of adaptive immunity. The online version of this article (doi:10.1038/nsmb.2328) contains supplementary material, which is available to authorized users.
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影响因子:
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作者:
Janvier, Katy;Kato, Yukio;Boehm, Markus;Rose, Jeremy R;Martina, Jose A;Kim, Bong-Yoon;Venkatesan, Sundararajan;Bonifacino, Juan S
通讯作者:
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DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
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作者:
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通讯作者:
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影响因子:
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作者:
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MILLS, J