Predicted to enable SNAP receptor activity; SNARE binding activity; and chloride channel inhibitor activity. Predicted to be involved in several processes, including Golgi vesicle transport; regulation of protein localization to plasma membrane; and retrograde transport, endosome to Golgi. Located in neuronal cell body and synaptic vesicle. Part of SNARE complex. Orthologous to human VTI1B (vesicle transport through interaction with t-SNAREs 1B). [provided by Alliance of Genome Resources, Apr 2022]