Enables ion gated channel activity and ligand-gated sodium channel activity. Acts upstream of or within several processes, including positive regulation of synapse assembly; regulation of systemic arterial blood pressure by aortic arch baroreceptor feedback; and sensory perception of mechanical stimulus. Located in dendritic spine and neuronal cell body. Is integral component of plasma membrane. Is expressed in several structures, including central nervous system. Orthologous to human ASIC2 (acid sensing ion channel subunit 2). [provided by Alliance of Genome Resources, Apr 2022]