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; Oncoprotein; Transcription factor
Molecular Function: sequence-specific DNA binding; transcription factor activity
Biological Process: defense response to protozoan; positive regulation of interleukin-10 biosynthetic process; positive regulation of interleukin-13 biosynthetic process; positive regulation of interleukin-2 biosynthetic process; positive regulation of interleukin-4 biosynthetic process; positive regulation of transcription from RNA polymerase II promoter; positive regulation of transcription, DNA-dependent