Cited by 1,381Metabolism, Diabetes, and CancerPI3K/AKT/mTOR signaling in cancerProtein Kinase Regulation and GTPase Signaling

LKB1 is a master kinase that activates 13 kinases of the AMPK subfamily, including MARK/PAR‐1

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Lizcano, Jose M, Göransson, Olga, Toth, Rachel, Deak, Maria, Morrice, Nick A, Boudeau, Jérôme, Hawley, Simon A, Udd, Lina +3 more·2004·The EMBO Journal

Abstract

We recently demonstrated that the LKB1 tumour suppressor kinase, in complex with the pseudokinase STRAD and the scaffolding protein MO25, phosphorylates and activates AMP-activated protein kinase (AMPK). A total of 12 human kinases (NUAK1, NUAK2, BRSK1, BRSK2, QIK, QSK, SIK, MARK1, MARK2, MARK3, MARK4 and MELK) are related to AMPK. Here we demonstrate that LKB1 can phosphorylate the T-loop of all the members of this subfamily, apart from MELK, increasing their activity >50-fold. LKB1 catalytic activity and the presence of MO25 and STRAD are required for activation. Mutation of the T-loop Thr phosphorylated by LKB1 to Ala prevented activation, while mutation to glutamate produced active forms of many of the AMPK-related kinases. Activities of endogenous NUAK2, QIK, QSK, SIK, MARK1, MARK2/3 and MARK4 were markedly reduced in LKB1-deficient cells. Neither LKB1 activity nor that of AMPK-related kinases was stimulated by phenformin or AICAR, which activate AMPK. Our results show that LKB1 functions as a master upstream protein kinase, regulating AMPK-related kinases as well as AMPK. Between them, these kinases may mediate the physiological effects of LKB1, including its tumour suppressor function.

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  • LKB-1 phosphorylates and activates PAR-1, but also phosphorylates the inactivating Ser-9 on GSK-3β and may be the elusive GSK-3β kinase activated by Wnt signaling.

    “LKB-1 phosphorylates and activates PAR-1 (120,122,123), but also phosphorylates the inactivating Ser-9 on GSK-3β and may be the elusive GSK-3β kinase activated by Wnt signaling (124).”

    From Functional genomic screen and network analysis reveal novel modifiers of tauopathy dissociated from tau phosphorylation (2011) · cites this paper as [122]

    Citation (124) is attached to the GSK-3β clause. The paper’s ‘Phosphorylation and activation of the MARK kinases by LKB1’ section reports phosphorylation of MARK kinases, but no passage found for GSK-3β Ser-9 phosphorylation or an LKB1 kinase role activated by Wnt signaling (searched: GSK3, Ser-9, and Wnt signaling). (LLM, conf=0.75)

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Authors
Lizcano, J. M., Göransson, O., Toth, R., Deak, M., Morrice, N. A., Boudeau, J., Hawley, S. A., Udd, L., Mäkelä, T. P., Hardie, D. G., & Alessi, D. R.
Affiliations
  • University of Dundee (GB)
  • University of Helsinki (FI)
Corresponding author
Alessi, Dario R
Venue
The EMBO Journal
Published
2004-02-19
Volume
23
Issue
4
Pages
833-843
ISSN
  • 0261-4189 (ISSN-L)
  • 1460-2075
OpenAlex
W2138319716
Cited by
1,381
References
53
Citations by year
2026: 41 · 2025: 44 · 2024: 57 · 2023: 38 · 2022: 56 · 2021: 70 · 2020: 60 · 2019: 51 · 2018: 52 · 2017: 56 · 2016: 61 · 2015: 68 · 2014: 91 · 2013: 82 · 2012: 88
FWCI
23.49
Type
journal article
Language
en
Open access
Locations
  • The EMBO Journal (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Discovery Research Portal (University of Dundee) (publishedVersion)
  • Lund University Publications (Lund University) (submittedVersion)
Funders
  • Pfizer
  • AstraZeneca
  • GlaxoSmithKline
  • University of Dundee
  • Merck KGaA
  • Wellcome Trust (01488, QLG1-CT-2001-01488)
  • Diabetes UK
  • European Commission
  • Medical Research Council
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
Keywords
LKB1, AMPK-related kinases, kinase activation, T-loop phosphorylation, STRAD, MO25, MARK kinases, MELK
MeSH terms
AMP-Activated Protein Kinase Kinases, Amino Acid Sequence, Cell Line, Enzyme Activation, Fibroblasts, Humans, Molecular Sequence Data, Multienzyme Complexes, Mutation, Peptides, Phosphorylation, Protein Binding, Substrate Specificity, Protein Serine-Threonine Kinases, Protein Subunits, Adaptor Proteins, Vesicular Transport, AMP-Activated Protein Kinases

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