Herpesvirus Genome Recognition Induced Acetylation of Nuclear IFI16 Is Essential for Its Cytoplasmic Translocation, Inflammasome and IFN-β Responses

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Herpesviruses establish a latent infection in the nucleus of specific cells and reactivation results in the nuclear viral dsDNA replication and infectious virus production. Host innate responses are initiated by the presence of viral genomes and their products, and nucleus associated IFI16 protein has recently emerged as an innate DNA sensor regulating inflammatory cytokines and type I interferon (IFN) production. IFI16 recognizes the herpesvirus genomes (KSHV, EBV, and HSV-1) in the nucleus resulting in the formation of the IFI16-ASC-Caspase-1 inflammasome complex and IL-1β production. HSV-1 genome recognition by IFI16 in the nucleus also leads to STING activation in the cytoplasm and IFN-β production. However, how IFI16 initiates inflammasome assembly and activates STING in the cytoplasm after nuclear recognition of viral genome are not known. We show that herpesvirus genome recognition in the nucleus by IFI16 leads to interaction with histone acetyltransferase-p300 and IFI16 acetylation which is essential for inflammasome assembly in the nucleus and cytoplasmic translocation, activation of STING in the cytoplasm and IFN-β production. These studies provide insight into a common molecular mechanism for the innate inflammasome assembly and STING activation response pathways that result in IL-1β and IFN-β production, respectively.

Vyšlo v časopise: Herpesvirus Genome Recognition Induced Acetylation of Nuclear IFI16 Is Essential for Its Cytoplasmic Translocation, Inflammasome and IFN-β Responses. PLoS Pathog 11(7): e32767. doi:10.1371/journal.ppat.1005019
Kategorie: Research Article
prolekare.web.journal.doi_sk: https://doi.org/10.1371/journal.ppat.1005019

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