A common bicyclic protein kinase cascade inactivates the regulatory enzymes of fatty acid and cholesterol biosynthesis
Open accessAbstract
A highly purified rat liver protein kinase phosphorylates and inactivates acetyl-CoA carboxylase, and causes rapid inactivation of microsomal HMG-CoA reductase in the presence of MgATP. Both effects are stimulated in an identical manner by AMP, and are greatly reduced by prior treatment of the kinase with purified protein phosphatase. The dephosphorylated kinase can be reactivated in the presence of MgATP, apparently due to a distinct kinase kinase, and this reactivation is stimulated by nanomolar concentrations of palmitoyl-CoA. These results show that a common, bicyclic protein kinase cascade can potently inactivate the regulatory enzymes of both fatty acid and cholesterol biosynthesis.
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Once activated, AMPK redirects metabolism toward increased catabolism or decreased anabolism through phosphorylation of key proteins across multiple pathways, including protein synthesis, lipid homeostasis, glucose metabolism, and mitochondrial homeostasis.
“Once activated, AMPK redirects metabolism toward increased catabolism or decreased anabolism through the phosphorylation of key proteins across multiple pathways, including protein synthesis (e.g., mammalian target of rapamycin complex (1) [2,3], lipid homeostasis (e.g., acetyl coenzyme A carboxylase, ACC) [4,5], glucose metabolism (e.g., phosphofructokinase (2) [6], and mitochondrial homeostasis”
From AMPK, Mitochondrial Function, and Cardiovascular Disease (2020) · cites this paper as [4]
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Self-citation
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- Authors
- Carling, D., Zammit, V. A., & Hardie, D. G.
- Affiliations
- University of Dundee (GB)
- Hannah Research Foundation (GB)
- Corresponding author
- Hardie, D.Grahame
- Venue
- FEBS Letters
- Publisher
- Wiley
- Published
- 1987-11-02
- Volume
- 223
- Issue
- 2
- Pages
- 217-222
- ISSN
- 0014-5793 (ISSN-L)
- 1873-3468
- OpenAlex
- W2033823674
- Cited by
- 599
- References
- 25
- Citations by year
- 2026: 11 · 2025: 24 · 2024: 20 · 2023: 23 · 2022: 27 · 2021: 30 · 2020: 29 · 2019: 30 · 2018: 23 · 2017: 14 · 2016: 28 · 2015: 17 · 2014: 24 · 2013: 30 · 2012: 22
- FWCI
- 6.48
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- FEBS Letters (publishedVersion)
- PubMed (publishedVersion)
- Funders
- British Heart Foundation
- Medical Research Council
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Lipids, and Metabolism
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Lipid metabolism and biosynthesis
- Health Sciences › Medicine › Surgery › Cholesterol and Lipid Metabolism
- Keywords
- protein kinase cascades, acetyl-CoA carboxylase, HMG-CoA reductase, fatty acid synthesis, cholesterol biosynthesis, AMP, palmitoyl-CoA, kinase dephosphorylation, protein phosphatase, enzyme inactivation
- MeSH terms
- Acetyl-CoA Carboxylase, Adenosine Monophosphate, Animals, Cholesterol, Fatty Acids, Hydroxymethylglutaryl CoA Reductases, Ligases, Liver, Phosphoprotein Phosphatases, Phosphoproteins, Phosphorylation, Protein Kinases, Rats
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