Enables signaling receptor activity. Predicted to be involved in several processes, including negative regulation of interleukin-6 production; negative regulation of leukocyte migration; and negative regulation of neuroinflammatory response. Located in external side of plasma membrane. Is expressed in central nervous system; liver lobe; retina; and thymus primordium. Orthologous to several human genes including CD200R1 (CD200 receptor 1). [provided by Alliance of Genome Resources, Apr 2022]