Enables calmodulin binding activity and syntaxin-1 binding activity. Involved in several processes, including positive regulation of inhibitory postsynaptic potential; positive regulation of secretion by cell; and secretion by cell. Located in cytosol; synaptic membrane; and terminal bouton. Orthologous to human UNC13B (unc-13 homolog B). [provided by Alliance of Genome Resources, Apr 2022]