Cited by 334Metabolism, Diabetes, and CancerGlycogen Storage Diseases and MyoclonusCardiac electrophysiology and arrhythmias

A novel domain in AMP-activated protein kinase causes glycogen storage bodies similar to those seen in hereditary cardiac arrhythmias

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Hudson, Emma R., Pan, David A., James, John, Lucocq, John M., Hawley, Simon A., Green, Kevin A., Baba, Otto, Terashima, Tatsuo +1 more·2003·Current Biology

Abstract

The AMP-activated protein kinase (AMPK) is an alphabetagamma heterotrimer that is activated by low cellular energy status and affects a switch away from energy-requiring processes and toward catabolism. While it is primarily regulated by AMP and ATP, high muscle glycogen has also been shown to repress its activation. Mutations in the gamma2 and gamma3 subunit isoforms lead to arrhythmias associated with abnormal glycogen storage in human heart and elevated glycogen in pig muscle, respectively. A putative glycogen binding domain (GBD) has now been identified in the beta subunits. Coexpression of truncated beta subunits lacking the GBD with alpha and gamma subunits yielded complexes that were active and normally regulated. However, coexpression of alpha and gamma with full-length beta caused accumulation of AMPK in large cytoplasmic inclusions that could be counterstained with anti-glycogen or anti-glycogen synthase antibodies. These inclusions were not affected by mutations that increased or abolished the kinase activity and were not observed by using truncated beta subunits lacking the GBD. Our results suggest that the GBD binds glycogen and can lead to abnormal glycogen-containing inclusions when the kinase is overexpressed. These may be related to the abnormal glycogen storage bodies seen in heart disease patients with gamma2 mutations.

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Crossref · 10.1016/s0960-9822(03)00249-5

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  • The β-subunit includes a carbohydrate-binding module that grants AMPK the ability to bind glycogen.

    “The β-subunit includes a carbohydrate-binding module that grants AMPK to bind to glycogen [25].”

    From AMPK, Mitochondrial Function, and Cardiovascular Disease (2020) · cites this paper as [25]

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Authors
Hudson, E. R., Pan, D. A., James, J., Lucocq, J. M., Hawley, S. A., Green, K. A., Baba, O., Terashima, T., & Hardie, D. G.
Affiliations
  • University of Dundee (GB)
  • Tokyo Medical and Dental University (JP)
Corresponding author
Hardie, D.Grahame
Venue
Current Biology
Publisher
Elsevier BV
Published
2003-05
Volume
13
Issue
10
Pages
861-866
ISSN
0960-9822 (ISSN-L)
OpenAlex
W2154405414
Cited by
332
References
28
Citations by year
2026: 4 · 2025: 4 · 2024: 6 · 2023: 4 · 2022: 10 · 2021: 11 · 2020: 8 · 2019: 10 · 2018: 13 · 2017: 10 · 2016: 12 · 2015: 17 · 2014: 16 · 2013: 16 · 2012: 20
FWCI
7.75
Type
journal article
Language
en
Open access
Locations
  • Current Biology (publishedVersion)
  • PubMed (publishedVersion)
  • Discovery Research Portal (University of Dundee) (publishedVersion)
Funders
  • Tenovus
  • European Commission
  • Wellcome Trust (QLG1-CT-2001-01488)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Health Sciences › Medicine › Rheumatology › Glycogen Storage Diseases and Myoclonus
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac electrophysiology and arrhythmias
Keywords
AMPK, glycogen synthase, protein inclusions, energy homeostasis, kinase overexpression
MeSH terms
Arrhythmias, Cardiac, Inclusion Bodies, Glycogen, Glycogen Synthase, Humans, Multienzyme Complexes, Precipitin Tests, Recombinant Fusion Proteins, Protein Serine-Threonine Kinases, Sequence Deletion, Protein Structure, Tertiary, Protein Subunits, Cell Line, Tumor, AMP-Activated Protein Kinases

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