The Potency of Nef-Mediated SERINC5 Antagonism Correlates with the Prevalence of Primate Lentiviruses in the Wild.

The Potency of Nef-Mediated SERINC5 Antagonism Correlates with the Prevalence of Primate Lentiviruses in the Wild.
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DOI:
10.1016/j.chom.2016.08.004
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发表时间:
2016-09-14
影响因子:
30.3
通讯作者:
Kirchhoff F
Kirchhoff F
中科院分区:
医学1区
文献类型:
--
作者:
Heigele A;Kmiec D;Regensburger K;Langer S;Peiffer L;Stürzel CM;Sauter D;Peeters M;Pizzato M;Learn GH;Hahn BH;Kirchhoff F

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细胞因子丝氨酸蛋白酶5(SERINC 5)损害HIV-1的感染性,但被病毒Nef蛋白拮抗。我们分析了Nef蛋白在灵长类慢病毒中的抗SERINC 5活性,并研究了SERINC 5是否代表跨物种传播和/或物种内病毒传播的障碍。HIV-1、HIV-2和SIV Nef以相似的效力抵消人、猿、猴和鼠SERINC 5直系同源物。然而,HIV-1 Nefs比HIV-2 Nefs对SERINC 5更有活性,黑猩猩SIV(SIVcpz)Nefs比它们的猴子前体更有效。此外,HIV和大多数SIV的Nef依赖于C-末端环中的双亮氨酸基序来进行抗SERINC 5活性,而来自疣猴SIV(SIVcol)的Nef进化出不同的抑制机制。我们还发现,在相应的猿和猴物种中,抗SERINC 5效力与SIV流行率之间存在显著相关性。因此,Nef介导的SERINC 5拮抗作用可能决定灵长类慢病毒在天然宿主内传播的能力。SERINC 5是一种限制性因子,可削弱逆转录病毒颗粒的感染性。Heigele等人表明,辅助病毒蛋白Nef对SERINC 5拮抗作用的效力与相应SIV在其各自野生宿主中的流行率相关,表明SERINC 5是病毒传播的潜在决定因素。
The cellular factor serine incorporator 5 (SERINC5) impairs HIV-1 infectivity but is antagonized by the viral Nef protein. We analyzed the anti-SERINC5 activity of Nef proteins across primate lentiviruses and examined whether SERINC5 represents a barrier to cross-species transmissions and/or within-species viral spread. HIV-1, HIV-2, and SIV Nefs counteract human, ape, monkey, and murine SERINC5 orthologs with similar potency. However, HIV-1 Nefs are more active against SERINC5 than HIV-2 Nefs, and chimpanzee SIV (SIVcpz) Nefs are more potent than those of their monkey precursors. Additionally, Nefs of HIV and most SIVs rely on the dileucine motif in the C-terminal loop for anti-SERINC5 activity, while the Nef from colobus SIV (SIVcol) evolved different inhibitory mechanisms. We also found a significant correlation between anti-SERINC5 potency and the SIV prevalence in the respective ape and monkey species. Thus, Nef-mediated SERINC5 antagonism may determine the ability of primate lentiviruses to spread within natural hosts. SERINC5 is a restriction factor that impairs the infectivity of retroviral particles. Heigele et al. show that the potency of SERINC5 antagonism by the accessory viral protein Nef correlates with the prevalence of corresponding SIVs in their respective wild-living hosts, suggesting that SERINC5 is a potential determinant of viral spread.
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