National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
P50GM082251
米国
National Science Foundation (NSF, United States)
DMR-1310687
米国
offer of the Director Grant
S10OD019995
米国
引用
ジャーナル: Nat Commun / 年: 2016 タイトル: In vitro protease cleavage and computer simulations reveal the HIV-1 capsid maturation pathway. 著者: Jiying Ning / Gonca Erdemci-Tandogan / Ernest L Yufenyuy / Jef Wagner / Benjamin A Himes / Gongpu Zhao / Christopher Aiken / Roya Zandi / Peijun Zhang / 要旨: HIV-1 virions assemble as immature particles containing Gag polyproteins that are processed by the viral protease into individual components, resulting in the formation of mature infectious particles. ...HIV-1 virions assemble as immature particles containing Gag polyproteins that are processed by the viral protease into individual components, resulting in the formation of mature infectious particles. There are two competing models for the process of forming the mature HIV-1 core: the disassembly and de novo reassembly model and the non-diffusional displacive model. To study the maturation pathway, we simulate HIV-1 maturation in vitro by digesting immature particles and assembled virus-like particles with recombinant HIV-1 protease and monitor the process with biochemical assays and cryoEM structural analysis in parallel. Processing of Gag in vitro is accurate and efficient and results in both soluble capsid protein and conical or tubular capsid assemblies, seemingly converted from immature Gag particles. Computer simulations further reveal probable assembly pathways of HIV-1 capsid formation. Combining the experimental data and computer simulations, our results suggest a sequential combination of both displacive and disassembly/reassembly processes for HIV-1 maturation.