Nuclear Trafficking of Retroviral RNAs and Gag Proteins during Late Steps of Replication

Viruses

Matthew S. Stake¹  Darrin V. Bann¹  Rebecca J. Kaddis¹ 

[1] Division of Infectious Diseases and Epidemiology, Department of Medicine, Penn State College of Medicine, 500 University Drive, Hershey, PA 17033, USA; E-Mails:

关键词: nuclear entry;    nuclear export;    nucleocytoplasmic trafficking;    virus assembly;    viral RNA packaging;    retroviral Gag protein;    HIV-1 Rev protein;    Rous sarcoma virus;    retroviruses;   

DOI  :  10.3390/v5112767

来源: mdpi

【 摘 要 】

Retroviruses exploit nuclear trafficking machinery at several distinct stages in their replication cycles. In this review, we will focus primarily on nucleocytoplasmic trafficking events that occur after the completion of reverse transcription and proviral integration. First, we will discuss nuclear export of unspliced viral RNA transcripts, which serves two essential roles: as the mRNA template for the translation of viral structural proteins and as the genome for encapsidation into virions. These full-length viral RNAs must overcome the cell’s quality control measures to leave the nucleus by co-opting host factors or encoding viral proteins to mediate nuclear export of unspliced viral RNAs. Next, we will summarize the most recent findings on the mechanisms of Gag nuclear trafficking and discuss potential roles for nuclear localization of Gag proteins in retrovirus replication.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.