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High-Pressure NMR Experiments for Detecting Protein Low-Lying Conformational States
Published on: June 29, 2021
Proteins remain soft at lower temperatures under pressure
Xiang-Qiang Chu1, Antonio Faraone, Chansoo Kim
1Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
The Journal of Physical Chemistry. B
|March 28, 2009
Summary
High pressure makes hydrated protein water dynamics faster at low temperatures. This suggests proteins remain soft and enzymatically active under pressure.
Area of Science:
- Biophysics
- Protein dynamics
- High-pressure studies
Background:
- Low-temperature protein behavior under pressure is understudied.
- Protein hydration water dynamics influence protein function.
Purpose of the Study:
- Investigate hydrated protein dynamics at low temperatures and moderate high pressures.
- Correlate protein softness and hydration water dynamics.
Main Methods:
- Quasielastic neutron scattering (QENS) on a hydrated protein system.
- Variable temperature and pressure conditions.
Main Results:
- Protein hydration water dynamics accelerate under pressure, not slow down.
- Protein softness, linked to enzymatic activity, mirrors hydration water dynamics.
- Observed trends hold across different temperatures and pressures.
Conclusions:
- Pressure at low temperatures enhances protein hydration water mobility.
- Protein softness and enzymatic activity are maintained under pressure at low temperatures.
- QENS provides insights into pressure effects on protein function.
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