Required for vesicular transport from the ER to the Golgi complex (PubMed:34779586). Functions as a SNARE involved in the docking process of ER-derived vesicles with the cis-Golgi membrane (By similarity). {ECO:0000250|UniProtKB:Q62896, ECO:0000269|PubMed:34779586}. This is the function of ENSG00000105829 (BET1, Bet1 golgi vesicular membrane trafficking protein).