Component of the TRAPP I and TRAPP II complexes. TRAPP I plays a key role in the late stages of endoplasmic reticulum to Golgi traffic. TRAPP II seems to play a role in intra-Golgi transport. Has a role late in meiosis following DNA replication (By similarity). Part of the multisubunit TRAPP (transport protein particle) complexes I and II. Belongs to the TRS85 family.