Enables succinate-CoA ligase (ADP-forming) activity. Involved in succinate metabolic process; succinyl-CoA metabolic process; and tricarboxylic acid cycle. Located in mitochondrion. Human ortholog(s) of this gene implicated in mitochondrial DNA depletion syndrome 5. Orthologous to human SUCLA2 (succinate-CoA ligase ADP-forming subunit beta). [provided by Alliance of Genome Resources, Apr 2022]