A phosphatidylinositol 3-kinase subclass that includes enzymes whose specificity is limited to 1-phosphatidylinositol. Members of this class play a role in vesicular transport and in the regulation of TOR KINASES.

Synonyms: Phosphatidylinositol 3-Kinase Catalytic Subunit Type 3, Phosphatidylinositol 3 Kinase Catalytic Subunit Type 3, Phosphatidylinositol 3-Kinase, Vps34, Phosphatidylinositol 3 Kinase, Class III, Class III Phosphatidylinositol 3 Kinase Catalytic Subunit, Class III Phosphatidylinositol 3-Kinase Catalytic Subunit, Phosphatidylinositol 3-Kinase p100 Subunit, Class III Phosphatidylinositol 3-Kinases, Class III Phosphatidylinositol 3 Kinases, Vacuolar Protein Sorting 34 Protein, Phosphatidylinositol 3-Kinase, Class III, Phosphatidylinositol 3 Kinase p100 Subunit, Vps34 Phosphatidylinositol 3-Kinase, VPS34 Sorting Protein, Vps34 Phosphatidylinositol 3 Kinase, EC 2.7.1.137