Predicted to enable hormone binding activity; melatonin receptor activity; and organic cyclic compound binding activity. Involved in several processes, including camera-type eye development; circadian rhythm; and negative regulation of insulin secretion. Located in neuronal cell body. Biomarker of type 2 diabetes mellitus. Orthologous to human MTNR1A (melatonin receptor 1A). [provided by Alliance of Genome Resources, Apr 2022]