ATP-binding cassette sub-family B member 3 ; Peptide supply factor 2 ; Peptide transporter PSF2 ; PSF-2 ; Peptide transporter TAP2 ; Peptide transporter involved in antigen processing 2 ; Really interesting new gene 11 protein ; ABCB3 ; PSF2 ; RING11 ; Y1
Categories
Elisa
Function
Involved in the transport of antigens from the cytoplasm to the endoplasmic reticulum for association with MHC class I molecules. Also acts as a molecular scaffold for the final stage of MHC class I folding, namely the binding of peptide. Nascent MHC class I molecules associate with TAP via tapasin. Inhibited by the covalent attachment of herpes simplex virus ICP47 protein, which blocks the peptide-binding site of TAP. Inhibited by human cytomegalovirus US6 glycoprotein, which binds to the lumenal side of the TAP complex and inhibits peptide translocation by specifically blocking ATP-binding to TAP1 and prevents the conformational rearrangement of TAP induced by peptide binding. Inhibited by human adenovirus E3-19K glycoprotein, which binds the TAP complex and acts as a tapasin inhibitor, preventing MHC class I/TAP association.
Specificity
Natural and recombinant Human Antigen peptide transporter 2
Subcellular Location
Endoplasmic reticulum membrane Multi-pass membrane protein The transmembrane segments seem to form a pore in the membrane.