Predicted to enable T cell receptor binding activity and beta-2-microglobulin binding activity. Predicted to be involved in several processes, including T cell differentiation in thymus; defense response to Gram-positive bacterium; and positive regulation of T cell mediated cytotoxicity directed against tumor cell target. Predicted to act upstream of or within defense response to Gram-negative bacterium. Predicted to be located in endoplasmic reticulum membrane; endosome membrane; and plasma membrane. Predicted to be part of MHC class I protein complex. Predicted to be active in external side of plasma membrane and extracellular space. Orthologous to human MR1 (major histocompatibility complex, class I-related). [provided by Alliance of Genome Resources, Apr 2022]