Predicted to enable transmembrane signaling receptor activity. Predicted to be involved in immune system process. Predicted to act upstream of or within inhibition of cysteine-type endopeptidase activity involved in apoptotic process; negative regulation of extrinsic apoptotic signaling pathway; and negative regulation of lymphocyte apoptotic process. Predicted to be located in external side of plasma membrane. Predicted to be active in plasma membrane. Orthologous to human FCMR (Fc fragment of IgM receptor). [provided by Alliance of Genome Resources, Apr 2022]