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Modular HIV-1 Capsid Assemblies Reveal Diverse Host-Capsid Recognition Mechanisms.
Cell Host & Microbe ( IF 20.6 ) Pub Date : 2019-08-14 , DOI: 10.1016/j.chom.2019.07.007
Brady J Summers 1 , Katherine M Digianantonio 1 , Sarah S Smaga 1 , Pei-Tzu Huang 1 , Kaifeng Zhou 1 , Eva E Gerber 1 , Wei Wang 1 , Yong Xiong 1
Affiliation  

The HIV-1 capsid is an ordered protein shell that houses the viral genome during early infection. Its expansive surface consists of an ordered and interfacing array of capsid protein hexamers and pentamers that are recognized by numerous cellular proteins. Many of these proteins recognize specific, assembled capsid interfaces not present in unassembled capsid subunits. We used protein-engineering tools to capture diverse capsid assembly intermediates. We built a repertoire of capsid assemblies (ranging from two to 42 capsid protein molecules) that recreate the various surfaces in infectious capsids. These assemblies reveal unique capsid-targeting mechanisms for each of the anti-HIV factors, TRIMCyp, MxB, and TRIM5α, linked to inhibition of virus uncoating and nuclear entry, as well as the HIV-1 cofactor FEZ1 that facilitates virus intracellular trafficking. This capsid assembly repertoire enables elucidation of capsid recognition modes by known capsid-interacting factors, identification of new capsid-interacting factors, and potentially, development of capsid-targeting therapeutics.

中文翻译:

模块化的HIV-1衣壳组件揭示了多种宿主衣壳识别机制。

HIV-1衣壳是有序的蛋白质壳,可在早期感染期间容纳病毒基因组。它的膨胀表面由衣壳蛋白六聚体和五聚体组成的有序且相互连接的阵列组成,可被众多细胞蛋白识别。这些蛋白质中的许多蛋白质识别未组装的衣壳亚基中不存在的特异性,组装的衣壳界面。我们使用蛋白质工程工具来捕获各种衣壳装配中间体。我们建立了一个衣壳装配体库(从两个到42个衣壳蛋白分子),可在感染性衣壳中重建各种表面。这些程序集揭示了针对每种抗HIV因子TRIMCyp,MxB和TRIM5α的独特的衣壳靶向机制,这些机制与抑制病毒脱壳和核进入有关,以及促进病毒细胞内运输的HIV-1辅助因子FEZ1。该衣壳装配库能够通过已知的衣壳相互作用因子阐明衣壳识别模式,鉴定新的衣壳相互作用因子,并有可能开发靶向衣壳的疗法。
更新日期:2019-08-14
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