Enables glutaminase activity and identical protein binding activity. Involved in glutamate biosynthetic process; glutamine catabolic process; and protein homotetramerization. Acts upstream of or within chemical synaptic transmission; regulation of respiratory gaseous exchange by nervous system process; and suckling behavior. Predicted to be located in mitochondrion. Is expressed in several structures, including alimentary system; cardiovascular system; genitourinary system; nervous system; and sensory organ. Human ortholog(s) of this gene implicated in developmental and epileptic encephalopathy 71. Orthologous to human GLS (glutaminase). [provided by Alliance of Genome Resources, Apr 2022]