Transcriptional activator. Binds to the interferon- stimulated response element (ISRE) of the MHC class I promoter. Binds the immunoglobulin lambda light chain enhancer, together with PU.1. Probably plays a role in ISRE-targeted signal transduction mechanisms specific to lymphoid cells. Interacts with SPIB and DEF6. Not induced by interferons. Lymphoid cells. Belongs to the IRF family. 2 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.
Protein type: DNA binding protein; Transcription factor
Cellular Component: membrane; nucleus; cytosol
Molecular Function: protein binding; sequence-specific DNA binding; protein-lysine N-methyltransferase activity; transcription factor binding; transcription factor activity
Biological Process: transcription, DNA-dependent; T cell activation; positive regulation of interleukin-2 biosynthetic process; positive regulation of transcription, DNA-dependent; cytokine and chemokine mediated signaling pathway; regulation of T-helper cell differentiation; myeloid dendritic cell differentiation; defense response to protozoan; peptidyl-lysine methylation; positive regulation of interleukin-4 biosynthetic process; positive regulation of interleukin-10 biosynthetic process; positive regulation of interleukin-13 biosynthetic process; negative regulation of toll-like receptor signaling pathway; positive regulation of transcription from RNA polymerase II promoter; positive regulation of DNA binding
SS: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.