Enables ATPase activator activity. Predicted to be involved in several processes, including negative regulation of intracellular signal transduction; negative regulation of protein ubiquitination; and regulation of establishment of protein localization. Predicted to act upstream of or within several processes, including androgen receptor signaling pathway; flagellated sperm motility; and toxin transport. Predicted to be located in membrane and microtubule cytoskeleton. Predicted to be active in cytosol. Orthologous to human DNAJA1 (DnaJ heat shock protein family (Hsp40) member A1). [provided by Alliance of Genome Resources, Apr 2022]