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. Component of the SEA complex composed of at least IML1/SEA1, RTC1/SEA2, MTC5/SEA3, NPR2, NPR3, SEA4, SEC13 and SEH1. Present with 279 molecules/cell in log phase SD medium. Belongs to the IML1 family.