Disease related genes, Human disease related genes, Plasma proteins
Intracellular, Membrane (different isoforms)
Cell type enhanced (NK-cells, Proximal enterocytes)
Low immune cell specificity
Cell line enhanced (A-431, EFO-21, RPTEC TERT1, U-266/70, U-266/84, U-698)
Heterotrimer that consists of an alpha chain HLA-C, a beta chain B2M and a peptide (peptide-HLA-C-B2M) (PubMed:28649982, PubMed:10850706, PubMed:24990997). Early in biogenesis, HLA-C-B2M dimer interacts with the components of the peptide-loading complex composed of TAPBP, TAP1-TAP2, TAPBPL, PDIA3/ERP57 and CALR (PubMed:18420581). Interacts with TAP1-TAP2 transporter via TAPBP; this interaction is obligatory for the loading of peptide epitopes delivered to the endoplasmic reticulum (ER) by TAP1-TAP2 transporter (By similarity). Being very selective in the peptide binding, forms a stable interaction with TAP1-TAP2, often leading to the accumulation of free heavy chains in the ER (PubMed:18420581). Only optimally assembled peptide-HLA-C-B2M trimer translocates to the surface of antigen-presenting cells, where it interacts with TCR and CD8 coreceptor on the surface of T cells. HLA-C (via polymorphic alpha-1 and alpha-2 domains) interacts with antigen-specific TCR (via CDR3 domains) (By similarity). One HLA-C molecule (mainly via nonpolymorphic alpha-3 domain) interacts with one CD8A homodimer (via CDR-like loop); this interaction insures peptide-HLA-C-B2M recognition by CD8-positive T cells only (By similarity). The peptide-HLA-C-B2M complex also interacts with KIRs. HLA-C type 1 (C1, with Asn104), including HLA-C*02, C*04, C*05, C*06 and C*15, interact with KIR2DL1 and KIR2DS1, and HLA-C type 2 (C2, with Lys104), including HLA-C*01, C*03, C*07 and C*08, interact with KIR2DL2 and KIR2DL3 (PubMed:20972337, PubMed:24091323, PubMed:16141329, PubMed:20439706, PubMed:11323700, PubMed:10850706). (Microbial infection) Interacts with HTLV-1 p12I accessory protein.
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For Research Use Only. Not For Clinical Use.