Vacuolar protein required for aerial conidiation and conidial maturation (PubMed:28557308). Also involved in blastospore production and cell cycle (PubMed:28557308). Plays a vital role in the secretion of Pr1 proteases for cuticular penetration and hence contributes significantly to host infection and virulence (PubMed:28557308). Localizes in vacuoles of germinating conidia, germ tubes and hyphal cells (PubMed:28557308). Affects proper autophagosome formation, asexual and blastospore development, and virulence (PubMed:28557308). Leads to severe defects in secretion of cuticle-degrading Pr1 proteases and melanisation of infected insects (PubMed:28557308). Reduces the transcript levels of all autophagy-related (ATG) genes including ATG1, ATG5 and ATG8, except unaffected ATG26 (PubMed:28557308).