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Biochemical methods to map and quantify allosteric motions in human glucokinase
Blaine H Gordon1, Peilu Liu2, A Carl Whittington3
1Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, United States; Institute of Molecular Biophysics, Florida State University, Tallahassee, FL, United States.
Methods in Enzymology
|May 28, 2023
Summary
Allosteric regulation involves protein structure changes affecting function. This study uses three biochemical methods to map these changes and understand protein dynamics for glucokinase allostery.
Area of Science:
- Biochemistry
- Structural Biology
- Biophysics
Background:
- Allosteric regulation is fundamental to biological processes, involving ligand-induced changes in protein structure and dynamics.
- Understanding allostery requires mapping structural alterations and quantifying dynamic changes in response to effectors.
Purpose of the Study:
- To describe three biochemical approaches for investigating the dynamic and structural aspects of protein allostery.
- To apply these methods to the cooperative enzyme glucokinase as a model system.
Main Methods:
- Pulsed proteolysis
- Biomolecular nuclear magnetic resonance (NMR) spectroscopy
- Hydrogen-deuterium exchange mass spectrometry (HDX-MS)
Main Results:
- These complementary techniques provide detailed insights into protein dynamics and structural changes associated with allosteric regulation.
- The combined application aids in establishing molecular models for allosteric proteins, particularly those involving differential dynamics.
Conclusions:
- The integrated use of pulsed proteolysis, NMR, and HDX-MS is powerful for elucidating the mechanisms of protein allostery.
- This approach is especially valuable for understanding allosteric proteins where conformational dynamics play a critical role.
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