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. May be involved in telomere capping. Component of the SEA complex composed of at least IML1/SEA1, RTC1/SEA2, MTC5/SEA3, NPR2, NPR3, SEA4, SEC13 and SEH1. Present with 556 molecules/cell in log phase SD medium. Belongs to the WD repeat WDR59 family.