Predicted to enable several functions, including ATPase binding activity; Hsp70 protein binding activity; and chaperone binding activity. Involved in forebrain development. Located in several cellular components, including dendritic spine; postsynaptic cytosol; and sperm head. Is active in glutamatergic synapse and postsynaptic density. Orthologous to human DNAJB1 (DnaJ heat shock protein family (Hsp40) member B1). [provided by Alliance of Genome Resources, Apr 2022]