Flexible use of nuclear import pathways by HIV-1.

Flexible use of nuclear import pathways by HIV-1.
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DOI:
10.1016/j.chom.2010.02.007
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发表时间:
2010-03-18
影响因子:
30.3
通讯作者:
KewalRamani VN
KewalRamani VN
中科院分区:
医学1区
文献类型:
--
作者:
Lee K;Ambrose Z;Martin TD;Oztop I;Mulky A;Julias JG;Vandegraaff N;Baumann JG;Wang R;Yuen W;Takemura T;Shelton K;Taniuchi I;Li Y;Sodroski J;Littman DR;Coffin JM;Hughes SH;Unutmaz D;Engelman A;KewalRamani VN

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The cellular and viral determinants required for HIV-1 infection of nondividing cells have been a subject of intense scrutiny. Here we identify the 68 kDa subunit of cleavage factor Im, CPSF6, as an inhibitor of HIV-1 infection. When enriched in the cytoplasm by high level expression or mutation, CPSF6 prevents nuclear entry of the virus. Similar to TRIM5 and Fv1 type restrictions, CPSF6 targets the viral capsid (CA). N74D mutation of the HIV-1 CA leads to a loss of interaction with CPSF6 and evasion of the nuclear import restriction. Interestingly, N74D mutation of CA changes HIV-1 nucleoporin (NUP) requirements. Whereas wild-type HIV-1 requires NUP153, N74D HIV-1 mimics the NUP requirements of feline immunodeficiency virus (FIV) and is more sensitive to NUP155 depletion. These findings reveal a remarkable flexibility in HIV-1 nuclear transport and highlight a single residue in CA as essential in regulating interactions with NUPs.
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