B-cell differentiation antigen CD72

UniProtKB accession:  P21855

Grouped By:  Matching UniProtKB accession

UniProtKB description:  Co-receptor of B cell receptor (BCR) that plays both positive and negative roles on B-cell functions (PubMed:10549631). Recognizes the Sm/ribonucleoprotein (RNP) self-antigen ligand, and coligation of CD72 and BCR inhibits BCR signaling (PubMed:27810925). Mechanistically, ligand binding leads to the recruitment of PTPN6/SHP-1 to the BCR complex which is inhibitory to BCR signaling (PubMed:9590210). Acts also as a ligand for CD5 and thereby plays a critical role in maintaining regulatory T and B-cell homeostasis (PubMed:9723705, PubMed:24950378).