Predicted to enable small GTPase binding activity. Involved in dense core granule priming. Predicted to be located in cytosol; lysosome; and secretory vesicle. Human ortholog(s) of this gene implicated in familial hemophagocytic lymphohistiocytosis 3. Orthologous to human UNC13D (unc-13 homolog D). [provided by Alliance of Genome Resources, Apr 2022]