Enables coreceptor activity. Predicted to be involved in several processes, including G protein-coupled receptor signaling pathway; positive regulation of intracellular signal transduction; and positive regulation of macromolecule metabolic process. Predicted to be located in plasma membrane. Predicted to be part of adrenomedullin receptor complex and amylin receptor complex 3. Predicted to be active in cell surface. Predicted to colocalize with lysosome. Orthologous to human RAMP3 (receptor activity modifying protein 3). [provided by Alliance of Genome Resources, Apr 2022]