This family is one of the subunits of the TRAPP Golgi trafficking complex. TRAPP subunits are found in two different sized complexes, TRAPP I and TRAPP II, and this Trs85 is in the smaller complex. TRAPP I, but Not TRAPP II, functions in ER-Golgi transport [1]. Trs85p was reported to function in the cytosol-to-vacuole targeting pathway, suggesting a role for this subunit in autophagy as well as in secretion [2]. The overall architecture of TRAPP I shows the other components to be Bet3p (TRAPPC3), Bet5p (TRAPPC1), Trs20p (TRAPPC2) , Trs23p (TRAPPC4), Trs31p (TRAPPC5), Trs33p (TRAPPC6a and b) and Trs85p.

1: TRAPP I implicated in the specificity of tethering in ER-to-Golgi transport. Sacher M, Barrowman J, Wang W, Horecka J, Zhang Y, Pypaert M, Ferro-Novick S; Mol Cell. 2001;7:433-442. PMID:11239471

2: Trs85 (Gsg1), a component of the TRAPP complexes, is required for the organization of the preautophagosomal structure during selective autophagy via the Cvt pathway. Meiling-Wesse K, Epple UD, Krick R, Barth H, Appelles A, Voss C, Eskelinen EL, Thumm M; J Biol Chem. 2005;280:33669-33678. PMID:16079147

3: The TRAPP complex: insights into its architecture and function. Sacher M, Kim YG, Lavie A, Oh BH, Segev N; Traffic. 2008;9:2032-2042. PMID:18801063