Enables phosphoribosylamine-glycine ligase activity. Involved in purine ribonucleoside monophosphate biosynthetic process. Is active in cytosol. Is expressed in several structures, including alimentary system; central nervous system; genitourinary system; respiratory system; and sensory organ. Orthologous to human GART (phosphoribosylglycinamide formyltransferase, phosphoribosylglycinamide synthetase, phosphoribosylaminoimidazole synthetase). [provided by Alliance of Genome Resources, Apr 2022]