Enables GABA-A receptor activity and transmitter-gated ion channel activity involved in regulation of postsynaptic membrane potential. Involved in gamma-aminobutyric acid signaling pathway and response to xenobiotic stimulus. Is active in GABA-ergic synapse. Is integral component of postsynaptic membrane. Orthologous to human GABRE (gamma-aminobutyric acid type A receptor subunit epsilon). [provided by Alliance of Genome Resources, Apr 2022]