Enables ATP-dependent protein binding activity. Predicted to be involved in chaperone-mediated protein folding and regulation of synaptic vesicle cycle. Predicted to act upstream of or within negative regulation of neuron apoptotic process. Located in terminal bouton. Is anchored component of synaptic vesicle membrane. Human ortholog(s) of this gene implicated in neuronal ceroid lipofuscinosis 4B. Orthologous to human DNAJC5 (DnaJ heat shock protein family (Hsp40) member C5). [provided by Alliance of Genome Resources, Apr 2022]