Predicted to enable ATPase activator activity. Acts upstream of or within several processes, including cellular response to starvation; negative regulation of mitochondrial electron transport, NADH to ubiquinone; and negative regulation of protein-containing complex assembly. Located in mitochondrial inner membrane. Is expressed in endocrine gland; genitourinary system; heart; and nervous system. Orthologous to human DNAJC15 (DnaJ heat shock protein family (Hsp40) member C15). [provided by Alliance of Genome Resources, Apr 2022]