Predicted to enable 1-phosphatidylinositol-3-kinase activity. Predicted to be involved in phosphatidylinositol phosphate biosynthetic process. Is an ortholog of C. elegans vps-34. In C. elegans, vps-34 is involved in several processes, including determination of adult lifespan; ecdysis, collagen and cuticulin-based cuticle; and regulation of transport.