Protein kinase, AMP-activated, alpha 1

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Protein PRKAA1 PDB 2h6d.png
Available structures
PDB Ortholog search: PDBe RCSB
Aliases PRKAA1, AMPK, AMPKa1, Protein kinase, AMP-activated, alpha 1, protein kinase AMP-activated catalytic subunit alpha 1
External IDs MGI: 2145955 HomoloGene: 49590 GeneCards: 5562
EC number
RNA expression pattern
PBB GE PRKAA1 209799 at tn.png
More reference expression data
Species Human Mouse
RefSeq (mRNA)



RefSeq (protein)



Location (UCSC) Chr 5: 40.76 – 40.8 Mb Chr 15: 5.14 – 5.18 Mb
PubMed search [1] [2]
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5'-AMP-activated protein kinase catalytic subunit alpha-1 is an enzyme that in humans is encoded by the PRKAA1 gene.[3][4]

The protein encoded by this gene belongs to the ser/thr protein kinase family. It is the catalytic subunit of the 5'-prime-AMP-activated protein kinase (AMPK). AMPK is a cellular energy sensor conserved in all eukaryotic cells. The kinase activity of AMPK is activated by the stimuli that increase the cellular AMP/ATP ratio. AMPK regulates the activities of a number of key metabolic enzymes through phosphorylation. It protects cells from stresses that cause ATP depletion by switching off ATP-consuming biosynthetic pathways. Alternatively spliced transcript variants encoding distinct isoforms have been observed.[4]


Protein kinase, AMP-activated, alpha 1 has been shown to interact with TSC2.[5][6]


  1. ^ "Human PubMed Reference:". 
  2. ^ "Mouse PubMed Reference:". 
  3. ^ Stapleton D, Mitchelhill KI, Gao G, Widmer J, Michell BJ, Teh T, House CM, Fernandez CS, Cox T, Witters LA, Kemp BE (Feb 1996). "Mammalian AMP-activated protein kinase subfamily". J Biol Chem. 271 (2): 611–4. doi:10.1074/jbc.271.2.611. PMID 8557660. 
  4. ^ a b "Entrez Gene: PRKAA1 protein kinase, AMP-activated, alpha 1 catalytic subunit". 
  5. ^ Inoki, Ken; Zhu Tianqing; Guan Kun-Liang (Nov 2003). "TSC2 mediates cellular energy response to control cell growth and survival". Cell. United States. 115 (5): 577–90. doi:10.1016/S0092-8674(03)00929-2. ISSN 0092-8674. PMID 14651849. 
  6. ^ Shaw, Reuben J; Bardeesy Nabeel; Manning Brendan D; Lopez Lyle; Kosmatka Monica; DePinho Ronald A; Cantley Lewis C (Jul 2004). "The LKB1 tumor suppressor negatively regulates mTOR signaling". Cancer Cell. United States. 6 (1): 91–9. doi:10.1016/j.ccr.2004.06.007. ISSN 1535-6108. PMID 15261145. 

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