Link between Primate Lentiviral Coreceptor Usage and Nef Function
Link between Primate Lentiviral Coreceptor Usage and Nef Function
复制标题
灵长类慢病毒辅助受体的使用与 Nef 功能之间的联系
DOI:
10.1016/j.celrep.2013.10.028
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发表时间:
2013
期刊:
影响因子:
8.8
通讯作者:
Silvestri
中科院分区:
文献类型:
--
作者:
Schmökel;Shabir;Hangxing;Matthias;Silvestri
Simian immunodeficiency virus (SIVsmm) infection of sooty mangabeys (Cercocebus atys) is characterized by stable CD4+T cell counts despite high plasma levels of CCR5-tropic viruses. However, in rare instances, SIVsmm acquires CXCR4 coreceptor tropism and causes severe CD4+T cell depletion, albeit without clinical signs of immunodeficiency. Here, we show that CXCR4-tropic SIVsmm strains lost their ability to downmodulate TCR-CD3 by evolving unusual Nef mutations that initially reduced (I132V) and subsequently disrupted (I123L and L146F) interaction with the CD3 ζ chain. This coevolution of Env and Nef function suggests that CD3 downmodulation is advantageous for viral replication in activated CCR5+memory T cells, but not in resting naive CXCR4+T cells that have not yet undergone TCR-CD3-mediated stimulation. This may explain why HIV-1, which generally lacks the CD3 downmodulation function, commonly switches to CXCR4 usage, whereas this is extremely rare for SIV strains that have retained this Nef activity.
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影响因子:
3.8
作者:
L. Xiao;D. Rudolph;S. Owen;T. Spira;R. Lal
通讯作者:
R. Lal
影响因子:
4.8
作者:
Fortin, JF;Barat, C;Tremblay, MJ
通讯作者:
Tremblay, MJ
DOI:
10.1073/pnas.0802203105
发表时间:
2008-05-27
影响因子:
11.1
作者:
Keele, Brandon F.;Giorgi, Elena E.;Shaw, George M.
通讯作者:
Shaw, George M.
影响因子:
5.4
作者:
Khalid, Mohammad;Yu, Hangxing;Kirchhoff, Frank
通讯作者:
Kirchhoff, Frank
DOI:
10.3934/mbe.2011.8.605
发表时间:
2011
期刊:
Mathematical biosciences and engineering : MBE
影响因子:
--
作者:
Weinberger,ArielD;Perelson,AlanS
通讯作者:
Perelson,AlanS