Herpes simplex virus US3 tegument protein inhibits Toll-like receptor 2 signaling at or before TRAF6 ubiquitination.

Abstract

Herpes simplex virus (HSV) has evolved multiple strategies to modulate host immune responses. In a screen of HSV open reading frames to identify additional HSV-encoded proteins that affect NF-κB signaling, we identified the viral US3 tegument protein as an inhibitor of NF-κB signaling. We found that the US3 protein is required for inhibition of TLR2 signaling induced by viral infection and that this inhibition occurs at very early times post-infection. Expression of US3 in transfected cells inhibits TLR2 signaling induced by Zymosan, and this inhibition occurs at or downstream of MyD88 and upstream of p65. Polyubiquitination of TRAF6 is critical for its function in TLR2 signaling. Using US3-null and US3 kinase-defective mutant viruses, we demonstrate that HSV US3 reduces TRAF6 polyubiquitination and that the kinase activity of US3 is necessary for this effect. Therefore, US3 is necessary and sufficient for inhibiting TLR2 signaling at or before the stage of TRAF6 ubiquitination.

DOI: 10.1016/j.virol.2013.01.026
02040201520162017
Citations per Year

Citation Velocity: 12

Averaging 12 citations per year over the last 3 years.

Learn more about how we calculate this metric in our FAQ.

Cite this paper

@article{Sen2013HerpesSV, title={Herpes simplex virus US3 tegument protein inhibits Toll-like receptor 2 signaling at or before TRAF6 ubiquitination.}, author={Jayita Sen and Xueqiao Liu and Richard J. Roller and David Michael Knipe}, journal={Virology}, year={2013}, volume={439 2}, pages={65-73} }