TAP protein
function

TAP(transporter associated with antigen processing) protein transports some of the peptide fragments degraded by proteasome into the endoplasmic reticucum and load onto ☆MHC class Ⅰ molecules

genetic mutation affecting MHC claps Ⅰ polypeptide complex expression(bare lymphocyte syndrome type Ⅰ)
→ulcerative glanulomatous skin lesions and frequent respiratory infeltions ☆despite normal lymphocyte and immunoglobulin levels

immunology UWorld