ILF2

Nuclear factor of activated T-cells (NFAT) is a transcription factor required for T-cell expression of the interleukin 2 gene. NFAT binds to a sequence in the interleukin 2 gene enhancer known as the antigen receptor response element 2. In addition, NFAT can bind RNA and is an essential component for encapsidation and protein priming of hepatitis B viral polymerase. NFAT is a heterodimer of 45 kDa and 90 kDa proteins, the smaller of which is the product of this gene. The encoded protein binds strongly to the 90 kDa protein and stimulates its ability to enhance gene expression. [provided by RefSeq]

Full Name

interleukin enhancer binding factor 2, 45kDa

Function

Chromatin-interacting protein that forms a stable heterodimer with interleukin enhancer-binding factor 3/ILF3 and plays a role in several biological processes including transcription, innate immunity or cell growth (PubMed:18458058, PubMed:31212927).
Essential for the efficient reshuttling of ILF3 (isoform 1 and isoform 2) into the nucleus. Together with ILF3, forms an RNA-binding complex that is required for mitotic progression and cytokinesis by regulating the expression of a cluster of mitotic genes. Mechanistically, competes with STAU1/STAU2-mediated mRNA decay (PubMed:32433969).
Plays also a role in the inhibition of various viruses including Japanese encephalitis virus or enterovirus 71.
(Microbial infection) Plays a positive role in HIV-1 virus production by binding to and thereby stabilizing HIV-1 RNA, together with ILF3.

Biological Process

Positive regulation of transcription, DNA-templatedManual Assertion Based On ExperimentIDA:UniProtKB

Cellular Location

Nucleus, nucleolus; Cytoplasm; Nucleus. Localized in cytoplasmic mRNP granules containing untranslated mRNAs.

PTM

Ubiquitinated at Lys-45 by CRBN with polyubiquitin chains by the CUL4-RING E3 ligase (CRL4-CRBN) and then degraded by the proteasome.