Predicted to enable SNAP receptor activity; SNARE binding activity; and protein N-terminus binding activity. Involved in endoplasmic reticulum to Golgi vesicle-mediated transport and vesicle fusion with Golgi apparatus. Located in Golgi membrane and endoplasmic reticulum. Part of SNARE complex. Orthologous to human STX5 (syntaxin 5). [provided by Alliance of Genome Resources, Apr 2022]