cell-biology

    AMP-Activated Protein Kinase (AMPK)

    Definition

    AMP-activated protein kinase (AMPK) is a highly conserved serine/threonine kinase that functions as a master regulator of cellular energy homeostasis. AMPK is activated when the AMP-to-ATP ratio increases, signaling low energy status, and responds by stimulating catabolic pathways such as fatty acid oxidation, glucose uptake, and autophagy while inhibiting anabolic processes like protein and lipid synthesis. The mitochondria-derived peptide MOTS-c has been shown to activate AMPK signaling, and AMPK is a key node connecting metabolic sensing to exercise mimetic effects and longevity pathways.

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