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Protein Page:
AMPKG3 (human)

AMPKG3 AMP/ATP-binding subunit of AMP-activated protein kinase (AMPK), an energy sensor protein kinase that plays a key role in regulating cellular energy metabolism. In response to reduction of intracellular ATP levels, AMPK activates energy-producing pathways and inhibits energy-consuming processes: inhibits protein, carbohydrate and lipid biosynthesis, as well as cell growth and proliferation. AMPK acts via direct phosphorylation of metabolic enzymes, and by longer-term effects via phosphorylation of transcription regulators. Also acts as a regulator of cellular polarity by remodeling the actin cytoskeleton; probably by indirectly activating myosin. Gamma non-catalytic subunit mediates binding to AMP, ADP and ATP, leading to activate or inhibit AMPK: AMP-binding results in allosteric activation of alpha catalytic subunit (PRKAA1 or PRKAA2) both by inducing phosphorylation and preventing dephosphorylation of catalytic subunits. ADP also stimulates phosphorylation, without stimulating already phosphorylated catalytic subunit. ATP promotes dephosphorylation of catalytic subunit, rendering the AMPK enzyme inactive. AMPK is a heterotrimer of an alpha catalytic subunit (PRKAA1 or PRKAA2), a beta (PRKAB1 or PRKAB2) and a gamma non- catalytic subunits (PRKAG1, PRKAG2 or PRKAG3). Interacts with FNIP1 and FNIP2. Skeletal muscle, with weak expression in heart and pancreas. Belongs to the 5'-AMP-activated protein kinase gamma subunit family. 2 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.
Protein type: Protein kinase, regulatory subunit
Chromosomal Location of Human Ortholog: 2q35
Cellular Component: cytosol; extracellular space; nucleoplasm
Molecular Function: protein kinase binding
Biological Process: cell cycle arrest; macroautophagy
Reference #:  Q9UGI9 (UniProtKB)
Alt. Names/Synonyms: 5'-AMP-activated protein kinase subunit gamma-3; 5'-AMP-activated protein kinase, gamma-3 subunit; AAKG3; AMPK gamma-3 chain; AMPK gamma3; AMPK subunit gamma-3; AMPKG3; PRKAG3; protein kinase, AMP-activated, gamma 3 non-catalytic subunit
Gene Symbols: PRKAG3
Molecular weight: 54,258 Da
Basal Isoelectric point: 5.59  Predict pI for various phosphorylation states
CST Pathways:  AMPK Signaling
Protein-Specific Antibodies or siRNAs from Cell Signaling Technology® Total Proteins
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Protein Structure Not Found.

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