U2 Small Nuclear RNA Auxiliary Factor 2 (U2AF2) Antibody – Rabbit Polyclonal

U2 auxiliary factor (U2AF), comprised of a large and a small subunit, is a non-snRNP protein required for the binding of U2 snRNP to the pre-mRNA branch site. This gene encodes the U2AF large subunit which contains a sequence-specific RNA-binding region with 3 RNA recognition motifs and an Arg/Ser-rich domain necessary for splicing. The large subunit binds to the polypyrimidine tract of introns early during spliceosome assembly. Multiple transcript variants have been detected for this gene, but the full-length natures of only two have been determined to date. [provided by RefSeq, Jul 2008]

U2AF2: Necessary for the splicing of pre-mRNA. Induces cardiac troponin-T (TNNT2) pre-mRNA exon inclusion in muscle. Regulates the TNNT2 exon 5 inclusion through competition with MBNL1. Binds preferentially to a single-stranded structure within the polypyrimidine tract of TNNT2 intron 4 during spliceosome assembly. Required for the export of mRNA out of the nucleus, even if the mRNA is encoded by an intron-less gene. Represses the splicing of MAPT/Tau exon 10. Belongs to the splicing factor SR family. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: Spliceosome; RNA splicing; RNA-binding

Chromosomal Location of Human Ortholog: 19q13.42

Cellular Component: nucleoplasm; spliceosome; nuclear speck

Molecular Function: protein binding; enzyme binding; nucleotide binding

Biological Process: nuclear mRNA splicing, via spliceosome; transcription from RNA polymerase II promoter; mRNA export from nucleus; negative regulation of nuclear mRNA splicing, via spliceosome; RNA splicing; gene expression; mRNA 3'-end processing; mRNA processing; termination of RNA polymerase II transcription; positive regulation of RNA splicing