Journal
SPECTROSCOPY-AN INTERNATIONAL JOURNAL
Volume 24, Issue 6, Pages 651-659Publisher
HINDAWI LTD
DOI: 10.1155/2010/706498
Keywords
EPR spectroscopy; site-directed spin labelling; membrane proteins; molecular modelling; distance measurements
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Funding
- Swiss National Science Foundation
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Electron paramagnetic resonance studies on diamagnetic proteins are based on site-directed spin labelling and require relatively much effort for engineering cystein point mutations as well as expressing and labelling the protein. Therefore, it is advantageous to predict those sites and pairs of sites that can provide the most precise and most reliable information on accessibility and distances. Systematic site scans based on a rotamer library approach for spin label side groups allow for such predictions. Figures of merit are defined that can be used to rank sites according to their potential suitability in studies of structure and structural changes. Such site scans can still provide useful results if only a backbone model and the amino acid sequence of the protein are known.
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