GATOR complex protein MIOS, a component of the GATOR subcomplex GATOR2 which consists of MIOS, SEC13, SEH1L, WDR24 and WDR59, and it activates mTORC1 and the TORC1 signaling pathway through the inhibition of the GATOR1 subcomplex [1]. Sea4 is the counterpart from yeast, a component of the SEA complex which coats the vacuolar membrane and is involved in intracellular trafficking, autophagy, response to nitrogen starvation, and amino acid biogenesis [2]. This entry represents a region between the WD40 and the zinc ribbon-like domains, which may have an alpha-solenoid structure.

1: The Sestrins interact with GATOR2 to negatively regulate the amino-acid-sensing pathway upstream of mTORC1. Chantranupong L, Wolfson RL, Orozco JM, Saxton RA, Scaria SM, Bar-Peled L, Spooner E, Isasa M, Gygi SP, Sabatini DM; Cell Rep. 2014;9:1-8. PMID:25263562

2: A conserved coatomer-related complex containing Sec13 and Seh1 dynamically associates with the vacuole in Saccharomyces cerevisiae. Dokudovskaya S, Waharte F, Schlessinger A, Pieper U, Devos DP, Cristea IM, Williams R, Salamero J, Chait BT, Sali A, Field MC, Rout MP, Dargemont C; Mol Cell Proteomics. 2011;10:M110. PMID:21454883