Structure of HIV-2 Nef reveals unique features distinct from HIV-1 involved in immune regulation
Structure of HIV-2 Nef reveals unique features distinct from HIV-1 involved in immune regulation
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HIV-2 Nef 的结构揭示了与参与免疫调节的 HIV-1 不同的独特特征
DOI:
10.1101/779439
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Hirao K
中科院分区:
文献类型:
--
作者:
Hirao K
The HIV accessory protein Nef plays a major role in establishing and maintaining infection, particularly through immune evasion. Many HIV-2 infected people experience long-term viral control and survival, resembling HIV-1 elite control. HIV-2 Nef has overlapping but also distinct functions from HIV-1 Nef. Here we report the crystal structure of HIV-2 Nef core. The dileucine sorting motif forms a helix bound to neighboring molecules, and moreover, isothermal titration calorimetry demonstrated that the CD3 endocytosis motif can directly bind to HIV-2 Nef, ensuring AP-2 mediated endocytosis for CD3. The highly-conserved C-terminal region forms a α-helix, absent from HIV-1. We further determined the structure of SIV Nef harboring this region, demonstrating similar C-terminal α-helix, which may contribute to AP-1 binding for MHC-I downregulation. These results provide new insights into the distinct pathogenesis of HIV-2 infection.
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DOI:
--
发表时间:
1998
期刊:
影响因子:
--
作者:
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通讯作者:
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MILLS, J
影响因子:
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通讯作者:
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