Function:Transcriptional activator. Binds to the interferon-stimulated response element (ISRE) in IFN promoters and in the Q promoter (Qp) of EBV nuclear antigen 1 (EBNA1) . Functions as a molecular switch for antiviral activity. Activated by phosphorylation in response to infection. Activation leads to nuclear retention , DNA binding , and derepression of transactivation ability. ,induction:By type I interferons. ,PTM:In response to a viral infection , phosphorylated on the C-terminal serine cluster. Phosphorylation , and subsequent activation is inhibited by vaccinia virus protein E3. ,similarity:Belongs to the IRF family. ,similarity:Contains 1 tryptophan pentad repeat DNA-binding domain. ,subcellular location:The phosphorylated and active form accumulates selectively in the nucleus. ,subunit:Homodimer; phosphorylation-induced. Interacts with TICAM1 and TICAM2. Interacts with rotavirus A NSP1; this interaction leads to the proteasome-dependent degradation of IRF7. Interacts with Epstein-Barr virus LF2. ,tissue specificity:Expressed predominantly in spleen , thymus and peripheral blood leukocytes. ,
展开内容