This region is found at the N terminal of Saccharomyces cerevisiae Trs120 protein (Swiss:Q04183). Trs120 is a subunit of the multiprotein complex TRAPP (transport particle protein) which functions in ER to Golgi traffic [1]. Trs120 is specific to the larger TRAPP complex, TRAPP II, along with Trs65p and Trs130p(TRAPPC10). It is suggested that Trs120p is required for the stability of the Trs130p subunit, suggesting that these two proteins might interact in some way [2]. It is likely that there is a complex function for TRAPP II in multiple pathways [3].

1: Identification and characterization of five new subunits of TRAPP. Sacher M, Barrowman J, Schieltz D, Yates JR 3rd, Ferro-Novick S; Eur J Cell Biol. 2000;79:71-80. PMID:10727015

2: TRAPPII subunits are required for the specificity switch of a Ypt-Rab GEF. Morozova N, Liang Y, Tokarev AA, Chen SH, Cox R, Andrejic J, Lipatova Z, Sciorra VA, Emr SD, Segev N; Nat Cell Biol. 2006;8:1263-1269. PMID:17041589

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