Sequences related to SUMO interaction motifs in herpes simplex virus 1 protein ICP0 act cooperatively to stimulate virus infection

Journal of Virology
R D EverettAnne Orr

Abstract

Herpes simplex virus type 1 immediate-early protein ICP0 is an E3 ubiquitin ligase of the RING finger class that degrades several cellular proteins during infection. This activity is essential for its functions in stimulating efficient lytic infection and productive reactivation from latency. ICP0 targets a number of proteins that are modified by the small ubiquitin-like SUMO family of proteins, and it includes a number of short sequences that are related to SUMO interaction motifs (SIMs). Therefore, ICP0 has characteristics that are related to those of cellular SUMO-targeted ubiquitin ligase enzymes. Here, we analyze the impact of mutation of a number of SIM-like sequences (SLSs) within ICP0 on HSV-1 replication and gene expression and their requirement for ICP0-mediated degradation of both sumoylated and unmodified promyelocytic leukemia (PML) and other sumoylated cellular proteins. One SLS in the central portion of the ICP0 sequence (SLS4) was found to be absolutely required for targeting cellular sumoylated species in general and sumoylated forms of PML other than those of PML isoform I. Mutation of a group of SLSs in the C-terminal quarter of ICP0 also reduced ICP0-mediated degradation of sumoylated PML in a cooperative ma...Continue Reading

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Citations

Jul 23, 2015·PLoS Pathogens·Elizabeth SloanRoger D Everett
Jun 18, 2020·Vaccines·Anthony C IkeSophia O Muo
Dec 31, 2020·Viruses·Christos DogrammatzisMaria Kalamvoki

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