TAP2 Antibody – Rabbit Polyclonal

The membrane-associated protein encoded by this gene is a member of the superfamily of ATP-binding cassette (ABC) transporters. ABC proteins transport various molecules across extra- and intra-cellular membranes. ABC genes are divided into seven distinct subfamilies (ABC1, MDR/TAP, MRP, ALD, OABP, GCN20, White). This protein is a member of the MDR/TAP subfamily. Members of the MDR/TAP subfamily are involved in multidrug resistance. This gene is located 7 kb telomeric to gene family member ABCB2. The protein encoded by this gene is involved in antigen presentation. This protein forms a heterodimer with ABCB2 in order to transport peptides from the cytoplasm to the endoplasmic reticulum. Mutations in this gene may be associated with ankylosing spondylitis, insulin-dependent diabetes mellitus, and celiac disease. Alternative splicing of this gene produces products which differ in peptide selectivity and level of restoration of surface expression of MHC class I molecules. [provided by RefSeq, Feb 2014]

TAP2: a 'transporter associated with antigen processing' (TAP) protein. Member of the ATP binding cassette (ABC) family of transmembrane transporters. Transports peptides across the endoplasmic reticulum membrane for assembly of major histocompatibility complex class I molecules. Two subunits, TAP1 and TAP2, are required for peptide transport. ATP hydrolysis is important for transport activity. Nascent MHC class I molecules associate with TAP via tapasin.

Protein type: Membrane protein, multi-pass; Membrane protein, integral; Transporter

Chromosomal Location of Human Ortholog: 6p21.3

Cellular Component: endoplasmic reticulum membrane; TAP complex; membrane; integral to membrane; integral to endoplasmic reticulum membrane

Molecular Function: tapasin binding; protein binding; peptide transporter activity; TAP1 binding; transporter activity; peptide antigen-transporting ATPase activity; ATP binding

Biological Process: intracellular transport of viral proteins in host cell; antigen processing and presentation of peptide antigen via MHC class I; metabolic process; positive regulation of antigen processing and presentation of peptide antigen via MHC class I; antigen processing and presentation of exogenous peptide antigen via MHC class I, TAP-dependent; antigen processing and presentation of exogenous peptide antigen via MHC class I; peptide antigen transport; transmembrane transport; antigen processing and presentation of endogenous peptide antigen via MHC class Ib via ER pathway, TAP-dependent; antigen processing and presentation of endogenous peptide antigen via MHC class I; cytosol to ER transport; antigen processing and presentation of endogenous peptide antigen via MHC class I via ER pathway, TAP-dependent; antigen processing and presentation of exogenous protein antigen via MHC class Ib, TAP-dependent

Disease: Bare Lymphocyte Syndrome, Type I