Predicted to enable transmembrane signaling receptor activity. Involved in mature B cell differentiation involved in immune response and positive regulation of immunoglobulin production in mucosal tissue. Predicted to be located in extracellular space. Predicted to be integral component of plasma membrane. Orthologous to human C17orf99 (chromosome 17 open reading frame 99). [provided by Alliance of Genome Resources, Apr 2022]