Enables (S)-2-(5-amino-1-(5-phospho-D-ribosyl)imidazole-4-carboxamido) succinate lyase (fumarate-forming) activity; N6-(1,2-dicarboxyethyl)AMP AMP-lyase (fumarate-forming) activity; and identical protein binding activity. Involved in several processes, including AMP biosynthetic process; response to hypoxia; and response to muscle activity. Located in cytosol. Biomarker of breast cancer. Human ortholog(s) of this gene implicated in adenylosuccinase lyase deficiency. Orthologous to human ADSL (adenylosuccinate lyase). [provided by Alliance of Genome Resources, Apr 2022]