Direct suppression of Stat1 function during adenoviral infection

Dwight C. Look, William T. Roswit, Annette G. Frick, Yael Gris-Alevy, Dellice M. Dickhaus, Michael J. Walter, Michael J. Holtzman

Research output: Contribution to journalArticlepeer-review

135 Scopus citations

Abstract

The action of adenoviral E1A oncoprotein on host immune-response genes has been attributed to interaction with p300/CBP-type transcriptional coactivators in competition with endogenous transcription factors such as signal transducer and activator of transcription (STAT) proteins. However, we show that mutant forms of E1A that no longer bind p300/CBP can still interact directly with Stat1 (via E1A N-terminal and Stat1 C-terminal residues) and block IFNγ-driven, Stat1-dependent gene activation and consequent function during early-phase infection in the natural host cell. The results provide a distinct and more specific mechanism for E1A-mediated immune suppression and an alternative model of IFNγ-driven enhanceosome formation that may allow for other adaptors (in addition to p300/CBP) to link Stat1 to the basal transcription complex.

Original languageEnglish
Pages (from-to)871-880
Number of pages10
JournalImmunity
Volume9
Issue number6
DOIs
StatePublished - Dec 1998

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