Enables coreceptor activity. Acts upstream of or within G protein-coupled receptor signaling pathway. Predicted to be located in extracellular space. Predicted to be part of CGRP receptor complex and amylin receptor complex 1. Predicted to be active in cell surface. Predicted to colocalize with plasma membrane. Is expressed in several structures, including adrenal gland; alimentary system; bone; brain; and reproductive system. Orthologous to human RAMP1 (receptor activity modifying protein 1). [provided by Alliance of Genome Resources, Apr 2022]