Understanding the molecular manipulation of DCAF1 by the lentiviral accessory proteins Vpr and Vpx.

Understanding the molecular manipulation of DCAF1 by the lentiviral accessory proteins Vpr and Vpx.
复制标题

了解慢病毒辅助蛋白 Vpr 和 Vpx 对 DCAF1 的分子操作。

DOI:
10.1016/j.virol.2014.11.024
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发表时间:
2015
期刊:
影响因子:
3.7
通讯作者:
Planelles,Vicente
Planelles,Vicente
中科院分区:
医学3区
文献类型:
--
作者:
Cassiday,PatrickA;DePaula-Silva,AnaBeatriz;Chumley,Jeffrey;Ward,Jeffrey;Barker,Edward;Planelles,Vicente

文献摘要

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Vpr 和 Vpx 是灵长类慢病毒蛋白,可操纵细胞 CRL4 泛素连接酶复合物。虽然 Vpr 对所有灵长类慢病毒来说都很常见,但 Vpx 仅由 HIV-2 和有限范围的 SIV 编码。尽管 Vpr 和 Vpx 具有高度同源性,但已知它们通过向 CRL4 募集不同底物而在宿主细胞生物学中诱导显着不同的效应。在这里,我们探讨了 HIV-1 Vpr 和 SIVmac Vpx 与 CRL4 底物受体 DCAF1 的相互作用。通过 DCAF1 的突变分析,我们证明虽然 Vpr 和 Vpx 具有高度相似的 DCAF1 结合基序,但它们与 DCAF1 中的一组不同残基相互作用。此外,我们表明,Vpx 通过蛋白质-蛋白质界面招募 SAMHD1,其中包括 SAMHD1 与 Vpx 和 DCAF1 的相互作用,正如晶体学数据中首次提出的那样(Schwefel, D.、Groom, H.C.T.、Boucherit, V.C.、Christodoulou, E.、Walker, P.A.、Stoye, J.P.、Bishop, K.N.、Taylor, I.A.、 2014. 慢病毒颠覆细胞蛋白质降解途径的结构基础。, Nature, 505, 234–238)。
Vpr and Vpx are primate lentivirus proteins that manipulate the cellular CRL4 ubiquitin ligase complex. While Vpr is common to all primate lentiviruses, Vpx is only encoded by HIV-2 and a limited range of SIVs. Although Vpr and Vpx share a high degree of homology they are known to induce markedly different effects in host cell biology through the recruitment of different substrates to CRL4. Here we explore the interaction of HIV-1 Vpr and SIVmac Vpx with the CRL4 substrate receptor DCAF1. Through mutational analysis of DCAF1 we demonstrate that although Vpr and Vpx share a highly similar DCAF1-binding motif, they interact with a different set of residues in DCAF1. In addition, we show that Vpx recruits SAMHD1 through a protein–protein interface that includes interactions of SAMHD1 with both Vpx and DCAF1, as was first suggested in crystallography data by (Schwefel, D., Groom, H.C.T., Boucherit, V.C., Christodoulou, E., Walker, P.A., Stoye, J.P., Bishop, K.N., Taylor, I.A., 2014. Structural basis of lentiviral subversion of a cellular protein degradation pathway., Nature, 505, 234–238).