G-protein coupled receptor for tyramine, a known neurotransmitter and neuromodulator and direct precursor of octopamine. Expression in amphidial sensory neurons suggests a role in chemosensation. Expressed in the pharyngeal neurons, MCL/R and NSML/R and the AS group of amphidial sensory neurons, ASEL/R, AGSL/R, ASHL/R and ASIL/R. Belongs to the G-protein coupled receptor 1 family.