Involved in transport from the ER to the Golgi apparatus as well as in intra-Golgi transport. It belongs to a super-family of proteins called t-SNAREs or soluble NSF (N-ethylmaleimide-sensitive factor) attachment protein receptor. Rescues alpha-factor maturation defects. Component of several multiprotein Golgi SNARE complexes. Identified in a Golgi SNARE complex consisting of t-SNARES SED5, YKT6, and the v-SNARE SFT1. Interacts with BET1. Interacts with BOS1. Interacts with SEC22. Interacts with PEP12. Interacts with self. Punctate localization pattern. Localization affected by loss of SVP26, a membrane protein, and is shifted to the ER. Lack of late Golgi SNARE proteins, TLG1 and TLG2. Spores are temperature sensitive and fail to germinate at 37 degrees Celsius. 10 to 20% of cells possess a variety of aberrant structures, including fragmentation of the vacuole, a common occurrence in secretory defects, and substantial accumulation of membranes in some cells. These structures are considered to be abnormal Golgi remnants. Endoplasmic reticulum (ER) retention defective, erd phenotype, which is characterized by hypersecretion of ER-resident proteins. This results from a defect in retrograde directed vesicles. Severely compromised viability when another Golgi protein, COY1P is overexpressed. Incomplete maturation of alpha-factor via defective localization of KEX2. Belongs to the GOSR1 family. Formerly referred to as a v-SNARE.