Cited by 168Metabolism, Diabetes, and CancerAdvanced Proteomics Techniques and ApplicationsProtein Kinase Regulation and GTPase Signaling

Motif affinity and mass spectrometry proteomic approach for the discovery of cellular AMPK targets: Identification of mitochondrial fission factor as a new AMPK substrate

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Ducommun, Serge, Deak, Maria, Sumpton, David, Ford, Rebecca J., Núñez Galindo, Antonio, Kussmann, Martin, Viollet, Benoit, Steinberg, Gregory R. +4 more·2015·Cellular Signalling

Abstract

AMP-activated protein kinase (AMPK) is a key cellular energy sensor and regulator of metabolic homeostasis. Although it is best known for its effects on carbohydrate and lipid metabolism, AMPK is implicated in diverse cellular processes, including mitochondrial biogenesis, autophagy, and cell growth and proliferation. To further our understanding of energy homeostasis through AMPK-dependent processes, the design and application of approaches to identify and characterise novel AMPK substrates are invaluable. Here, we report an affinity proteomicstrategy for the discovery and validation of AMPK targets using an antibody to isolate proteins containing the phospho-AMPK substrate recognition motif from hepatocytes that had been treated with pharmacological AMPK activators. We identified 57 proteins that were uniquely enriched in the activator-treated hepatocytes, but were absent in hepatocytes lacking AMPK. We focused on two candidates, cingulin and mitochondrial fission factor (MFF), and further characterised/validated them as AMPK-dependent targets by immunoblotting with phosphorylation site-specific antibodies. A small-molecule AMPK activator caused transient phosphorylation of endogenous cingulin at S137 in intestinal Caco2 cells. Multiple splice-variants of MFF appear to express in hepatocytes and we identified a common AMPK-dependent phospho-site (S129) in all the 3 predominant variants spanning the mass range and a short variant-specific site (S146). Collectively, our proteomic-based approach using a phospho-AMPK substrate antibody in combination with genetic models and selective AMPK activators will provide a powerful and reliable platform for identifying novel AMPK-dependent cellular targets.

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  1. G.J. Gowans, D.G. Hardie, Biochem. Soc. Trans. 42 (2014) 71-75.
  2. H.M. O'Neill, S.J. Maarbjerg, J.D. Crane, J. Jeppesen, S.B. Jorgensen, J.D. Schertzer, O. Shyroka, B. Kiens, B.J. van Denderen, M.A. Tarnopolsky, B.E. Kemp, E.A. Richter, G.R. Steinberg, Proc. Natl. Acad. Sci. U. S. A. 108 (2011) 16092-16097.
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Authors
Ducommun, S., Deak, M., Sumpton, D., Ford, R. J., Núñez Galindo, A., Kussmann, M., Viollet, B., Steinberg, G. R., Foretz, M., Dayon, L., Morrice, N. A., & Sakamoto, K.
Affiliations
  • École Polytechnique Fédérale de Lausanne (CH)
  • Cancer Research UK Scotland Institute (GB)
  • McMaster University (CA)
  • Centre National de la Recherche Scientifique (FR)
Corresponding author
Sakamoto, Kei
Venue
Cellular Signalling
Publisher
Elsevier BV
Published
2015-05
Volume
27
Issue
5
Pages
978-988
ISSN
0898-6568 (ISSN-L)
OpenAlex
W1982521131
Cited by
167
References
37
Citations by year
2026: 7 · 2025: 7 · 2024: 15 · 2023: 12 · 2022: 14 · 2021: 20 · 2020: 22 · 2019: 16 · 2018: 15 · 2017: 17 · 2016: 15 · 2015: 7
FWCI
7.95
Type
journal article
Language
en
Open access
Locations
  • Cellular Signalling (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • ENLIGHTEN (Jurnal Bimbingan dan Konseling Islam) (acceptedVersion)
Funders
  • Région Ile-de-France (CORDDIM)
  • Société Francophone du Diabète (SFD)
  • Canadian Institutes of Health Research (811812)
  • Canadian Diabetes Association (846130)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Physical Sciences › Chemistry › Spectroscopy › Advanced Proteomics Techniques and Applications
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
Keywords
AMPK, mitochondrial fission factor, cingulin, affinity proteomics, hepatocytes, AMPK activators, protein phosphorylation, splice variants, energy homeostasis, mitochondrial fission
MeSH terms
Amino Acid Sequence, Animals, Cells, Cultured, Humans, Male, Membrane Proteins, Mice, Inbred C57BL, Molecular Sequence Data, Phosphorylation, Mass Spectrometry, Caco-2 Cells, Hepatocytes, Mitochondrial Proteins, Proteomics, Mice, AMP-Activated Protein Kinases

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