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Time‐resolved structural studies of protein reaction dynamics: a smorgasbord of X‐ray approaches

Time‐resolved structural studies of protein reaction dynamics: a smorgasbord of X‐ray approaches Proteins undergo conformational changes during their biological function. As such, a high‐resolution structure of a protein's resting conformation provides a starting point for elucidating its reaction mechanism, but provides no direct information concerning the protein's conformational dynamics. Several X‐ray methods have been developed to elucidate those conformational changes that occur during a protein's reaction, including time‐resolved Laue diffraction and intermediate trapping studies on three‐dimensional protein crystals, and time‐resolved wide‐angle X‐ray scattering and X‐ray absorption studies on proteins in the solution phase. This review emphasizes the scope and limitations of these complementary experimental approaches when seeking to understand protein conformational dynamics. These methods are illustrated using a limited set of examples including myoglobin and haemoglobin in complex with carbon monoxide, the simple light‐driven proton pump bacteriorhodopsin, and the superoxide scavenger superoxide reductase. In conclusion, likely future developments of these methods at synchrotron X‐ray sources and the potential impact of emerging X‐ray free‐electron laser facilities are speculated upon. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Acta Crystallographica Section A: Foundations and Advances Wiley

Time‐resolved structural studies of protein reaction dynamics: a smorgasbord of X‐ray approaches

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References (191)

Publisher
Wiley
Copyright
Copyright © 2010 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0108-7673
eISSN
1600-5724
DOI
10.1107/S0108767309054361
pmid
20164644
Publisher site
See Article on Publisher Site

Abstract

Proteins undergo conformational changes during their biological function. As such, a high‐resolution structure of a protein's resting conformation provides a starting point for elucidating its reaction mechanism, but provides no direct information concerning the protein's conformational dynamics. Several X‐ray methods have been developed to elucidate those conformational changes that occur during a protein's reaction, including time‐resolved Laue diffraction and intermediate trapping studies on three‐dimensional protein crystals, and time‐resolved wide‐angle X‐ray scattering and X‐ray absorption studies on proteins in the solution phase. This review emphasizes the scope and limitations of these complementary experimental approaches when seeking to understand protein conformational dynamics. These methods are illustrated using a limited set of examples including myoglobin and haemoglobin in complex with carbon monoxide, the simple light‐driven proton pump bacteriorhodopsin, and the superoxide scavenger superoxide reductase. In conclusion, likely future developments of these methods at synchrotron X‐ray sources and the potential impact of emerging X‐ray free‐electron laser facilities are speculated upon.

Journal

Acta Crystallographica Section A: Foundations and AdvancesWiley

Published: Jan 1, 2010

Keywords: ; ; ; ; ; ;

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