Cited by 429Metabolism, Diabetes, and CancerMuscle metabolism and nutritionCardiovascular and exercise physiology

Global Phosphoproteomic Analysis of Human Skeletal Muscle Reveals a Network of Exercise-Regulated Kinases and AMPK Substrates

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Hoffman, Nolan J., Parker, Benjamin L., Chaudhuri, Rima, Fisher-Wellman, Kelsey H., Kleinert, Maximilian, Humphrey, Sean J., Yang, Pengyi, Holliday, Mira +10 more·2015·Cell Metabolism

Abstract

Exercise is essential in regulating energy metabolism and whole-body insulin sensitivity. To explore the exercise signaling network, we undertook a global analysis of protein phosphorylation in human skeletal muscle biopsies from untrained healthy males before and after a single high-intensity exercise bout, revealing 1,004 unique exercise-regulated phosphosites on 562 proteins. These included substrates of known exercise-regulated kinases (AMPK, PKA, CaMK, MAPK, mTOR), yet the majority of kinases and substrate phosphosites have not previously been implicated in exercise signaling. Given the importance of AMPK in exercise-regulated metabolism, we performed a targeted in vitro AMPK screen and employed machine learning to predict exercise-regulated AMPK substrates. We validated eight predicted AMPK substrates, including AKAP1, using targeted phosphoproteomics. Functional characterization revealed an undescribed role for AMPK-dependent phosphorylation of AKAP1 in mitochondrial respiration. These data expose the unexplored complexity of acute exercise signaling and provide insights into the role of AMPK in mitochondrial biochemistry.

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Crossref · 10.1016/j.cmet.2015.09.001

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  • Phosphorylation of human BAG3 on Thr285 and Ser289 decreases in response to endurance exercise.

    “Moreover, the phosphorylation of human BAG3 on Thr285 and Ser 289 decreases in response to endurance exercise (61).”

    From The Hippo signal transduction network for exercise physiologists (2016) · cites this paper as [61]

    The Results section, “Acute exercise-regulated phosphorylation in human skeletal muscle” (page unavailable), reports exercise-related phosphosite changes generally but does not identify BAG3. Searches of our copy for BAG3, Thr285, and Ser289 found no passage establishing that phosphorylation at either site decreases after exercise. (LLM, conf=0.72)

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Authors
Hoffman, N. J., Parker, B. L., Chaudhuri, R., Fisher-Wellman, K. H., Kleinert, M., Humphrey, S. J., Yang, P., Holliday, M., Trefely, S., Fazakerley, D. J., Stöckli, J., Burchfield, J. G., Jensen, T. E., Jothi, R., Kiens, B., Wojtaszewski, J. F. P., Richter, E. A., & James, D. E.
Affiliations
  • The University of Sydney (AU)
  • University of Copenhagen (DK)
  • Garvan Institute of Medical Research (AU)
  • National Institutes of Health (US)
Corresponding author
James, David E.
Venue
Cell Metabolism
Publisher
Elsevier BV
Published
2015-11
Volume
22
Issue
5
Pages
922-935
ISSN
1550-4131 (ISSN-L)
OpenAlex
W1839260472
Cited by
426
References
50
Citations by year
2026: 27 · 2025: 38 · 2024: 45 · 2023: 37 · 2022: 47 · 2021: 46 · 2020: 45 · 2019: 50 · 2018: 32 · 2017: 30 · 2016: 25 · 2015: 4
FWCI
13.18
Type
journal article
Language
en
Update notices
erratum (2015-11-03)
Open access
Locations
  • Cell Metabolism (publishedVersion)
  • PubMed (publishedVersion)
  • Research at the University of Copenhagen (University of Copenhagen) (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Research Bank (Australian Catholic University) (submittedVersion)
Funders
  • Novo Nordisk Fonden (NNF15OC0015182, NNF14OC0012009, NNF14OC0012319)
  • National Institutes of Health
  • National Institute of Environmental Health Sciences (ZIAES102625)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
  • Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
Keywords
skeletal muscle, protein phosphorylation, AKAP1, mitochondrial respiration, high-intensity exercise, phosphosites, kinase substrates, energy metabolism, insulin sensitivity, phosphoproteomics
MeSH terms
Machine Learning, Adult, Energy Metabolism, Humans, Male, Mitochondria, Phosphoproteins, Phosphorylation, Physical Conditioning, Animal, Substrate Specificity, Signal Transduction, Exercise, Muscle, Skeletal, A Kinase Anchor Proteins, AMP-Activated Protein Kinases

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