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. The protein encoded by this gene is involved in the pumping of degraded cytosolic peptides across the endoplasmic reticulum into the membrane-bound compartment where class I molecules assemble. Mutations in this gene may be associated with ankylosing spondylitis, insulin-dependent diabetes mellitus, and celiac disease.
ABC transporter, MHC 1; ABC17; ABCB2; Antigen peptide transporter 1; APT1; ATP-binding cassette sub-family B member 2; ATP-binding cassette, sub-family B (MDR/TAP), member 2; D6S114E; DAAP-57C1.5; FLJ26666; FLJ41500; Peptide supply factor 1; Peptide transporter involved in antigen processing 1; Peptide transporter PSF1; Peptide transporter TAP1; PSF-1; PSF1; Really interesting new gene 4 protein; RING4; TAP1*0102N; TAP1N; transporter 1 ABC (ATP binding cassette); transporter 1 ATP-binding cassette sub-family B; transporter 1, ATP-binding cassette, sub-family B (MDR/TAP); transporter associated with antigen processing; transporter, ATP-binding cassette, major histocompatibility complex, 1