The Role of VP16 in the Life Cycle of Alphaherpesviruses

Dengjian Fan; Mingshu Wang; Anchun Cheng; Renyong Jia; Qiao Yang; Ying Wu; Dekang Zhu; Xinxin Zhao; Shun Chen; Mafeng Liu; Shaqiu Zhang; Xumin Ou; Sai Mao; Qun Gao; Di Sun; Xingjian Wen; Yunya Liu; Yanling Yu; Ling Zhang; Bin Tian; Leichang Pan; Xiaoyue Chen

doi:10.3389/fmicb.2020.01910

The Role of VP16 in the Life Cycle of Alphaherpesviruses

Front Microbiol. 2020 Aug 18:11:1910. doi: 10.3389/fmicb.2020.01910. eCollection 2020.

Authors

Dengjian Fan^{1

2

3}, Mingshu Wang^{1

2

3}, Anchun Cheng^{1

2

3}, Renyong Jia^{1

2

3}, Qiao Yang^{1

2

3}, Ying Wu^{1

2

3}, Dekang Zhu^{2

3}, Xinxin Zhao^{1

2

3}, Shun Chen^{1

2

3}, Mafeng Liu^{1

2

3}, Shaqiu Zhang^{1

2

3}, Xumin Ou^{1

2

3}, Sai Mao^{1

2

3}, Qun Gao^{1

2

3}, Di Sun^{1

2

3}, Xingjian Wen^{1

2

3}, Yunya Liu^{1

2

3}, Yanling Yu^{1

2

3}, Ling Zhang^{1

2

3}, Bin Tian^{1

3}, Leichang Pan^{1

3}, Xiaoyue Chen^{1

2

3}

Affiliations

¹ Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.
² Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, China.
³ Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.

Abstract

The protein encoded by the UL48 gene of alphaherpesviruses is named VP16 or alpha-gene-transactivating factor (α-TIF). In the early stage of viral replication, VP16 is an important transactivator that can activate the transcription of viral immediate-early genes, and in the late stage of viral replication, VP16, as a tegument, is involved in viral assembly. This review will explain the mechanism of VP16 acting as α-TIF to activate the transcription of viral immediate-early genes, its role in the transition from viral latency to reactivation, and its effects on viral assembly and maturation. In addition, this review also provides new insights for further research on the life cycle of alphaherpesviruses and the role of VP16 in the viral life cycle.

Keywords: VP16; alphaherpesvirus; reactivation from latency; secondary envelopment; transcriptional activation.

Publication types

Review