Enables adenylate cyclase inhibiting G protein-coupled glutamate receptor activity. Involved in adenylate cyclase-inhibiting G protein-coupled glutamate receptor signaling pathway and chemical synaptic transmission. Predicted to be located in Golgi membrane; endoplasmic reticulum membrane; and new growing cell tip. Predicted to be integral component of plasma membrane. Human ortholog(s) of this gene implicated in congenital stationary night blindness 1B. Orthologous to human GRM6 (glutamate metabotropic receptor 6). [provided by Alliance of Genome Resources, Apr 2022]