Enables ligand-gated ion channel activity involved in regulation of presynaptic membrane potential and transmitter-gated ion channel activity involved in regulation of postsynaptic membrane potential. Predicted to be involved in several processes, including chemical synaptic transmission; chloride transmembrane transport; and regulation of membrane potential. Predicted to act upstream of or within chloride transport. Located in glutamatergic synapse. Is active in GABA-ergic synapse. Is expressed in brain; cerebral cortex; and retina. Orthologous to human GABRR1 (gamma-aminobutyric acid type A receptor subunit rho1). [provided by Alliance of Genome Resources, Apr 2022]