HLA-B Associated Transcript 1 (BAT1) Human Recombinant Protein

This gene encodes a member of the DEAD box family of RNA-dependent ATPases that mediate ATP hydrolysis during pre-mRNA splicing. The encoded protein is an essential splicing factor required for association of U2 small nuclear ribonucleoprotein with pre-mRNA, and it also plays an important role in mRNA export from the nucleus to the cytoplasm. This gene belongs to a cluster of genes localized in the vicinity of the genes encoding tumor necrosis factor alpha and tumor necrosis factor beta. These genes are all within the human major histocompatibility complex class III region. Mutations in this gene may be associated with rheumatoid arthritis. Alternative splicing results in multiple transcript variants. Related pseudogenes have been identified on both chromosomes 6 and 11. Read-through transcription also occurs between this gene and the upstream ATP6V1G2 (ATPase, H+ transporting, lysosomal 13kDa, V1 subunit G2) gene. [provided by RefSeq, Feb 2011]

BAT1: Component of the THO subcomplex of the TREX complex. The TREX complex specifically associates with spliced mRNA and not with unspliced pre-mRNA. It is recruited to spliced mRNAs by a transcription-independent mechanism. Binds to mRNA upstream of the exon-junction complex (EJC) and is recruited in a splicing- and cap-dependent manner to a region near the 5' end of the mRNA where it functions in mRNA export. The recruitment occurs via an interaction between ALYREF/THOC4 and the cap-binding protein NCBP1. DDX39B functions as a bridge between ALYREF/THOC4 and the THO complex. The TREX complex is essential for the export of Kaposi's sarcoma-associated herpesvirus (KSHV) intronless mRNAs and infectious virus production. The recruitment of the TREX complex to the intronless viral mRNA occurs via an interaction between KSHV ORF57 protein and ALYREF/THOC4. Belongs to the DEAD box helicase family. DECD subfamily. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: RNA-binding; RNA splicing; Spliceosome; EC 3.6.4.13; Helicase

Chromosomal Location of Human Ortholog: 6p21.3

Cellular Component: nucleoplasm; spliceosome; cytoplasm; nuclear speck; nucleus

Molecular Function: U4 snRNA binding; ATP-dependent protein binding; protein binding; RNA-dependent ATPase activity; ATP binding; ATP-dependent RNA helicase activity; U6 snRNA binding

Biological Process: nuclear mRNA splicing, via spliceosome; mRNA export from nucleus; RNA secondary structure unwinding; positive regulation of RNA elongation; RNA splicing; spliceosome assembly; intronless viral mRNA export from host nucleus