Heat shock protein 90AB1 and hyperthermia rescue infectivity of HIV with defective cores.
Heat shock protein 90AB1 and hyperthermia rescue infectivity of HIV with defective cores.
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DOI:
10.1016/j.virol.2012.11.005
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发表时间:
2013-02-05
期刊:
影响因子:
3.7
通讯作者:
Stoddart CA
中科院分区:
文献类型:
--
作者:
Joshi P;Sloan B;Torbett BE;Stoddart CA
We previously showed that reduced infectivity of HIV with incompletely processed capsid-spacer protein 1 (CA-SP1) is rescued by cellular activation or increased expression of HSP90AB1, a member of the cytosolic heat shock protein 90 family. Here we show that HSP90AB1 is present in HIV virions and that HSP90AB1, but not nonfunctional mutated HSP90AB1E42A+D88A, restores infectivity to HIV with mutations in CA that alter core stability. Further, the CA mutants were hypersensitive to pharmacological inhibition of HSP90AB1. In agreement with, we found that culturing HIV at 39.5 °C enhanced viral infectivity up to 30-fold in human peripheral blood mononuclear cells (p = 0.002) and rescued CA-mutant infectivity in nonactivated cells, concurrent with elevated expression of HSP90AB1 during hyperthermia. In sum, the transdominant effect of HSP90AB1 on CA-mutant HIV infectivity suggests a potential role for this class of cellular chaperones in HIV core stability and uncoating.
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