Cited by 1,589Metabolism, Diabetes, and CancerProtein Kinase Regulation and GTPase SignalingPI3K/AKT/mTOR signaling in cancer

Calmodulin-dependent protein kinase kinase-β is an alternative upstream kinase for AMP-activated protein kinase

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Hawley, Simon A., Pan, David A., Mustard, Kirsty J., Ross, Louise, Bain, Jenny, Edelman, Arthur M., Frenguelli, Bruno G., Hardie, D. Grahame·2005·Cell Metabolism

Abstract

The AMP-activated protein kinase (AMPK) is a critical regulator of energy balance at both the cellular and whole-body levels. Two upstream kinases have been reported to activate AMPK in cell-free assays, i.e., the tumor suppressor LKB1 and calmodulin-dependent protein kinase kinase. However, evidence that this is physiologically relevant currently only exists for LKB1. We now report that there is a significant basal activity and phosphorylation of AMPK in LKB1-deficient cells that can be stimulated by Ca2+ ionophores, and studies using the CaMKK inhibitor STO-609 and isoform-specific siRNAs show that CaMKKbeta is required for this effect. CaMKKbeta also activates AMPK much more rapidly than CaMKKalpha in cell-free assays. K(+)-induced depolarization in rat cerebrocortical slices, which increases intracellular Ca2+ without disturbing cellular adenine nucleotide levels, activates AMPK, and this is blocked by STO-609. Our results suggest a potential Ca(2+)-dependent neuroprotective pathway involving phosphorylation and activation of AMPK by CaMKKbeta.

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Crossref · 10.1016/j.cmet.2005.05.009

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  • LKB1 and CAMKK2 are the two main mammalian upstream molecules that phosphorylate AMPK.

    “Liver kinase B 1 (LKB1) [32] and calcium/calmodulin-dependent protein kinase kinase (CAMKK) 2 [33,34] can be employed as the two main mammalian upstream molecules that phosphorylate AMPK.”

    From AMPK, Mitochondrial Function, and Cardiovascular Disease (2020) · cites this paper as [34]

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Authors
Hawley, S. A., Pan, D. A., Mustard, K. J., Ross, L., Bain, J., Edelman, A. M., Frenguelli, B. G., & Hardie, D. G.
Affiliations
  • University of Dundee (GB)
  • University at Buffalo, State University of New York (US)
Corresponding author
Hardie, D. Grahame
Venue
Cell Metabolism
Publisher
Elsevier BV
Published
2005-07
Volume
2
Issue
1
Pages
9-19
ISSN
1550-4131 (ISSN-L)
OpenAlex
W2067979493
Cited by
1,589
References
48
Citations by year
2026: 41 · 2025: 38 · 2024: 57 · 2023: 53 · 2022: 64 · 2021: 78 · 2020: 90 · 2019: 64 · 2018: 84 · 2017: 82 · 2016: 84 · 2015: 92 · 2014: 77 · 2013: 84 · 2012: 118
FWCI
27.73
Type
journal article
Language
en
Open access
Locations
  • Cell Metabolism (publishedVersion)
  • PubMed (publishedVersion)
  • Discovery Research Portal (University of Dundee) (submittedVersion)
Funders
Wellcome Trust
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
Keywords
AMPK, CaMKKβ, LKB1, AMPK activation, upstream kinases, calcium ionophore, STO-609, potassium depolarization, intracellular calcium, neuroprotection, energy metabolism
MeSH terms
Calcimycin, Acetyl-CoA Carboxylase, Adenosine Diphosphate, Adenosine Triphosphate, Animals, Benzimidazoles, Brain, Enzyme Activation, Fibroblasts, HeLa Cells, Humans, Isoquinolines, Multienzyme Complexes, Phosphoprotein Phosphatases, Phosphorylation, Substrate Specificity, Protein Serine-Threonine Kinases, RNA, Small Interfering, Mice, Rats, Naphthalimides, Calcium-Calmodulin-Dependent Protein Kinase Kinase, AMP-Activated Protein Kinases, In Vitro Techniques

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