Predicted to enable SNAP receptor activity. Predicted to be involved in endoplasmic reticulum to Golgi vesicle-mediated transport; retrograde vesicle-mediated transport, Golgi to endoplasmic reticulum; and vesicle fusion with Golgi apparatus. Predicted to act upstream of or within protein transport and vesicle-mediated transport. Predicted to be located in several cellular components, including Golgi apparatus; endoplasmic reticulum-Golgi intermediate compartment membrane; and melanosome. Predicted to be part of SNARE complex. Predicted to be active in ER to Golgi transport vesicle membrane; Golgi membrane; and endoplasmic reticulum membrane. Orthologous to human SEC22B (SEC22 homolog B, vesicle trafficking protein).