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Updated: Mar 6, 2026

Oligopeptide Competition Assay for Phosphorylation Site Determination
Published on: May 18, 2017
Allosteric Modulation of AMPK Enzymatic Activity: In Vitro Characterization
J Ward1, A R Reyes1, R G Kurumbail2
1Cardiovascular and Metabolic Diseases Research Unit, Pfizer Worldwide Research and Development, Cambridge, MA, United States.
AMP-activated protein kinase (AMPK) is a crucial cellular energy sensor. This study details assay methods for discovering and characterizing small-molecule AMPK activators, vital for understanding cellular metabolism and stress responses.
Area of Science:
- Biochemistry
- Cellular Biology
- Molecular Pharmacology
Background:
- AMP-activated protein kinase (AMPK) acts as a master regulator of cellular energy homeostasis.
- AMPK activation is critical during cellular stress, influencing metabolism, growth, and autophagy.
- AMPK activation involves AMP binding to the gamma subunit, enhancing phosphorylation, preventing dephosphorylation, and allosteric activation.
Purpose of the Study:
- To describe assay formats for identifying small-molecule activators of AMPK.
- To facilitate the characterization of compounds targeting AMPK activity.
Main Methods:
- Development and application of various assay formats.
- Screening for small-molecule compounds that modulate AMPK activity.
Main Results:
- Several effective assay formats for AMPK activator discovery were established.
- Characterization methodologies for identified compounds were outlined.
Conclusions:
- Assays are essential for identifying and characterizing small-molecule AMPK activators.
- Targeting AMPK with small molecules holds therapeutic potential for metabolic and stress-related disorders.
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