HIV-1 Integrase Binds the Viral RNA Genome and Is Essential during Virion Morphogenesis.
HIV-1 Integrase Binds the Viral RNA Genome and Is Essential during Virion Morphogenesis.
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DOI:
10.1016/j.cell.2016.07.044
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发表时间:
2016-08-25
期刊:
影响因子:
64.5
通讯作者:
Kvaratskhelia, Mamuka
中科院分区:
文献类型:
--
作者:
Kessl, Jacques J.;Kutluay, Sebla B.;Townsend, Dana;Rebensburg, Stephanie;Slaughter, Alison;Larue, Ross C.;Shkriabai, Nikoloz;Bakouche, Nordine;Fuchs, James R.;Bieniasz, Paul D.;Kvaratskhelia, Mamuka
While an essential role of HIV-1 integrase (IN) for integration of viral cDNA into human chromosome is established, studies with IN mutants and allosteric IN inhibitors (ALLINIs) have suggested that IN can also influence viral particle maturation. However, it has remained enigmatic as to how IN contributes to virion morphogenesis. Here we demonstrate that IN directly binds the viral RNA genome in virions. These interactions have specificity as IN exhibits distinct preference for select viral RNA structural elements. We show that IN substitutions that selectively impair its binding to viral RNA result in eccentric, non-infectious virions without affecting nucleocapsid-RNA interactions. Likewise, ALLINIs impair IN binding to viral RNA in virions of wild type but not escape mutant virus. These results reveal an unexpected biological role of IN binding to the viral RNA genome during virion morphogenesis and elucidate the mode of action of ALLINIs. HIV-1 integrase binding to the viral RNA genome is necessary for formation of infectious viral particles and can be impaired by allosteric integrase inhibitors.
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