IRF2

IRF2 encodes interferon regulatory factor 2, a member of the interferon regulatory transcription factor (IRF) family. IRF2 competitively inhibits the IRF1-mediated transcriptional activation of interferons alpha and beta, and presumably other genes that employ IRF1 for transcription activation. However, IRF2 also functions as a transcriptional activator of histone H4.

interferon regulatory factor 2

Specifically binds to the upstream regulatory region of type I IFN and IFN-inducible MHC class I genes (the interferon consensus sequence (ICS)) and represses those genes. Also acts as an activator for several genes including H4 and IL7. Constitutively binds to the ISRE promoter to activate IL7. Involved in cell cycle regulation through binding the site II (HiNF-M) promoter region of H4 and activating transcription during cell growth. Antagonizes IRF1 transcriptional activation.

Cell population proliferationManual Assertion Based On ExperimentTAS:ProtInc
Defense response to virusManual Assertion Based On ExperimentIDA:UniProtKB
Immune system processManual Assertion Based On ExperimentIBA:GO_Central
Negative regulation of transcription by RNA polymerase IIManual Assertion Based On ExperimentTAS:ProtInc
Positive regulation of transcription by RNA polymerase IIManual Assertion Based On ExperimentIMP:NTNU_SB
Regulation of transcription by RNA polymerase IIManual Assertion Based On ExperimentIBA:GO_Central
Regulation of transcription, DNA-templatedManual Assertion Based On ExperimentIMP:UniProtKB

Nucleus

Acetylated by CBP/ p300 during cell-growth. Acetylation on Lys-75 is required for stimulation of H4 promoter activity.
The major sites of sumoylation are Lys-137 and Lys-293. Sumoylation with SUMO1 increases its transcriptional repressor activity on IRF1 and diminishes its ability to activate ISRE and H4 promoter.