Cellular minichromosome maintenance complex component 5 (MCM5) is incorporated into HIV-1 virions and modulates viral replication in the newly infected cells.

Authors

Steven Santos
Yuri Obukhov
Sergei Nekhai
Tatiana Pushkarsky
Beda Brichacek
Michael Bukrinsky, George Washington UniversityFollow
Sergey Iordanskiy

Document Type

Journal Article

Publication Date

7-11-2016

Journal

Virology

Volume

497

Inclusive Pages

11-22

DOI

10.1016/j.virol.2016.06.023

Abstract

The post-entry events of HIV-1 infection occur within reverse transcription complexes derived from the viral cores entering the target cell. HIV-1 cores contain host proteins incorporated from virus-producing cells. In this report, we show that MCM5, a subunit of the hexameric minichromosome maintenance (MCM) DNA helicase complex, associates with Gag polyprotein and is incorporated into HIV-1 virions. The progeny virions depleted of MCM5 demonstrated reduced reverse transcription in newly infected cells, but integration and subsequent replication steps were not affected. Interestingly, increased packaging of MCM5 into the virions also led to reduced reverse transcription, but here viral replication was impaired. Our data suggest that incorporation of physiological amounts of MCM5 promotes aberrant reverse transcription, leading to partial incapacitation of cDNA, whereas increased MCM5 abundance leads to reduced reverse transcription and infection. Therefore, MCM5 has the properties of an inhibitory factor that interferes with production of an integration-competent cDNA product.

Comments

Reproduced with permission of Elsevier B.V. Virology

APA Citation

Santos, S., Obukhov, Y., Nekhai, S., Pushkarsky, T., Brichacek, B., Bukrinsky, M., & Iordanskiy, S. (2016). Cellular minichromosome maintenance complex component 5 (MCM5) is incorporated into HIV-1 virions and modulates viral replication in the newly infected cells.. Virology, 497 (). http://dx.doi.org/10.1016/j.virol.2016.06.023

Peer Reviewed

1

Open Access

1