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PKM2 functions as a histidine kinase to phosphorylate PGAM1 to increase glycolysis shunts in cancer-Cellular lipid level assessment

ABSTRACT: Phosphoglycerate mutase 1 (PGAM1) is a key node enzyme that diverts the metabolic reactions from glycolysis into its shunts to support macromolecule biosynthesis for rapid and sustainable cell proliferation. It is prevalent that PGAM1 activity is upregulated in various tumors; however, the underlying mechanism remains unclear. Here, we unveil that pyruvate kinase M2 (PKM2) moonlights as a histidine kinase in a phosphoenolpyruvate (PEP)-dependent manner to catalyze PGAM1 H11 phosphorylation, that is essential for PGAM1 activity. Moreover, monomeric and dimeric PKM2 are efficient to phosphorylate and activate PGAM1, while the tetrameric PKM2 is not. In response to epidermal growth factor (EGF) signaling, Src-catalyzed PGAM1 Y119 phosphorylation is a prerequisite for PKM2 binding and the subsequent PGAM1 H11 phosphorylation, which constitutes the discrepancy between tumor cells and normal ones. A PGAM1-derived pY119-containing cell-permeable peptide or Y119 mutation disrupted the interaction of PGAM1 with PKM2 and its H11 phosphorylation, and eventually dampened the glycolysis shunts and tumor growth. We not only identified a function of PKM2 as a histidine kinase, but also illustrated an enzymes-cross-talk regulatory mode during metabolic reprogramming.

INSTRUMENT(S): Q Exactive HF

ORGANISM(S): Homo Sapiens (human)

TISSUE(S): Lung, Epithelial Cell

DISEASE(S): Lung Cancer

SUBMITTER: Min Wei

LAB HEAD: Min Wei

PROVIDER: PXD049310 | Pride | 2024-03-21

REPOSITORIES: Pride

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			Action	DRS
	Neg-WT-Rep1.mzML	Mzml
	Neg-WT-Rep1.raw	Raw
	Neg-WT-Rep2.mzML	Mzml
	Neg-WT-Rep2.raw	Raw
	Neg-WT-Rep3.mzML	Mzml

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