Enables NAD binding activity; carboxylic acid binding activity; and succinate-semialdehyde dehydrogenase (NAD+) activity. Involved in succinate metabolic process. Located in mitochondrion. Human ortholog(s) of this gene implicated in succinic semialdehyde dehydrogenase deficiency. Orthologous to human ALDH5A1 (aldehyde dehydrogenase 5 family member A1). [provided by Alliance of Genome Resources, Apr 2022]