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Local Mutations Can Serve as a Game Changer for Global Protein Solvent Interaction
Ellen M Adams1, Simone Pezzotti1, Jonas Ahlers1
1Lehrstuhl für Physkalische Chemie II, Ruhr Universität Bochum, 44801 Bochum, Germany.
JACS Au
|August 2, 2021
Summary
Local mutations in enzymes like matrix metalloproteinases (MMPs) impact protein stability and activity by altering water dynamics. This study reveals a global effect of local mutations on water networks, offering new avenues for rational protein design.
Area of Science:
- Biochemistry
- Biophysics
- Computational Biology
Background:
- Enzyme activity and stability are sensitive to local mutations.
- Rational protein design remains a significant challenge.
- Local mutations affect electrostatic fields and water dynamics near protein surfaces.
Purpose of the Study:
- To investigate the global effects of local enzyme mutations on solvent properties.
- To explore the relationship between mutation-induced changes in water networks and protein stability.
- To demonstrate the utility of terahertz (THz) spectroscopy in probing these solvent effects for protein design.
Main Methods:
- Combined computational design, molecular dynamics (MD) simulations, and experimental validation.
- Utilized terahertz (THz) spectroscopy to probe solvent contributions.
- Focused on the matrix metalloprotease MMP14 as a model system.
Main Results:
- Local mutations in MMP14 influence large-scale water hydrogen-bonding networks at the protein surface.
- These mutation-induced solvent changes are correlated with protein stability.
- Terahertz spectroscopy can experimentally detect these solvent property alterations.
Conclusions:
- Local mutations exert global effects on protein-associated water dynamics.
- Tuning hydration water properties through rational design can modulate protein stability and enzymatic activity.
- This work provides a framework for advancing rational protein design by considering solvent effects.
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