Phosphatidylinositol 3-kinase catalytic subunit type 3 (PIK3C3)

Catalytic subunit of the PI3K complex that mediates formation of phosphatidylinositol 3-phosphate; different complex forms are thought to play a role in multiple membrane trafficking pathways: PI3KC3-C1 is involved in initiation of autophagosomes and PI3KC3-C2 in maturation of autophagosomes and endocytosis. Involved in regulation of degradative endocytic trafficking and required for the abcission step in cytokinesis, probably in the context of PI3KC3-C2 (PubMed:20643123, PubMed:20208530).

Involved in the transport of lysosomal enzyme precursors to lysosomes. Needed for transport from early to late endosomes (By similarity).