Serine/threonine-protein kinase ULK2 (ULK2)

Acts upstream of phosphatidylinositol 3- kinase PIK3C3 to modulate the formation of autophagophores, the precursors of autophagosomes. Section of regulatory feedback loops in autophagy: acts both as a downstream effector and a negative regulator of mammalian target of rapamycin complex 1 (mTORC1) through interaction with RPTOR.

Activated via phosphorylation by AMPK, also acts as a negative regulator of AMPK through phosphorylation of the AMPK subunits PRKAA1, PRKAB2 and PRKAG1. May phosphorylate ATG13/KIAA0652, FRS2, FRS3 and RPTOR; however these information need additional evidences.