Enables identical protein binding activity and thyrotropin-releasing hormone receptor activity. Involved in positive regulation of cytosolic calcium ion concentration and positive regulation of protein-containing complex assembly. Located in cell surface. Used to study hypertension. Human ortholog(s) of this gene implicated in congenital nongoitrous hypothyroidism 7 and hypertension. Orthologous to human TRHR (thyrotropin releasing hormone receptor). [provided by Alliance of Genome Resources, Apr 2022]