Analysis of the SUMO2 proteome during HSV-1 infection

Sloan, E. , Tatham, M. H., Groslambert, M., Glass, M., Orr, A., Hay, R. T. and Everett, R. D. (2015) Analysis of the SUMO2 proteome during HSV-1 infection. PLoS Pathogens, 11(7), e1005059. e1005059. (doi: 10.1371/journal.ppat.1005059) (PMID:26200910) (PMCID:PMC4511656)

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Covalent linkage to members of the small ubiquitin-like (SUMO) family of proteins is an important mechanism by which the functions of many cellular proteins are regulated. Sumoylation has roles in the control of protein stability, activity and localization, and is involved in the regulation of transcription, gene expression, chromatin structure, nuclear transport and RNA metabolism. Sumoylation is also linked, both positively and negatively, with the replication of many different viruses both in terms of modification of viral proteins and modulation of sumoylated cellular proteins that influence the efficiency of infection. One prominent example of the latter is the widespread reduction in the levels of cellular sumoylated species induced by herpes simplex virus type 1 (HSV-1) ubiquitin ligase ICP0. This activity correlates with relief from intrinsic immunity antiviral defence mechanisms. Previous work has shown that ICP0 is selective in substrate choice, with some sumoylated proteins such the promyelocytic leukemia protein PML being extremely sensitive, while RanGAP is completely resistant. Here we present a comprehensive proteomic analysis of changes in the cellular SUMO2 proteome during HSV-1 infection. Amongst the 877 potentially sumoylated species detected, we identified 124 whose abundance was decreased by a factor of 3 or more by the virus, several of which were validated by western blot and expression analysis. We found many previously undescribed substrates of ICP0 whose degradation occurs by a range of mechanisms, influenced or not by sumoylation and/or the SUMO2 interaction motif within ICP0. Many of these proteins are known or are predicted to be involved in the regulation of transcription, chromatin assembly or modification. These results present novel insights into mechanisms and host cell proteins that might influence the efficiency of HSV-1 infection.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Groslambert, Miss Marine and Everett, Professor Roger and Glass, Dr Mandy and Orr, Mrs Anne and Sloan, Dr Elizabeth
Authors: Sloan, E., Tatham, M. H., Groslambert, M., Glass, M., Orr, A., Hay, R. T., and Everett, R. D.
College/School:College of Medical Veterinary and Life Sciences > School of Infection & Immunity
College of Medical Veterinary and Life Sciences > School of Infection & Immunity > Centre for Virus Research
Journal Name:PLoS Pathogens
Publisher:Public Library of Science
ISSN (Online):1553-7374
Copyright Holders:Copyright © 2015 The Authors
First Published:First published in PLoS Pathogens 11(7):e1005059
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
656501Regulation of the initial stages of herpes simplex virus lytic infection and reactivation from latencyRoger EverettMedical Research Council (MRC)MC_UU_12014/4MVLS III - CENTRE FOR VIRUS RESEARCH