Enables adenylosuccinate synthase activity. Involved in several processes, including IMP metabolic process; aspartate metabolic process; and cellular response to electrical stimulus. Predicted to be located in mitochondrion. Predicted to be active in cytoplasm. Biomarker of sarcoma. Orthologous to human ADSS2 (adenylosuccinate synthase 2). [provided by Alliance of Genome Resources, Apr 2022]