Enables growth factor activity. Acts upstream of or within several processes, including positive regulation of high voltage-gated calcium channel activity; regulation of postsynaptic membrane potential; and regulation of synaptic vesicle recycling. Predicted to be located in cytosol. Predicted to be active in cytoplasm and nucleus. Human ortholog(s) of this gene implicated in spinocerebellar ataxia type 27. Orthologous to human FGF14 (fibroblast growth factor 14). [provided by Alliance of Genome Resources, Apr 2022]