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doi:10.1016/S1090-7807(03)00119-8    
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Copyright © 2003 Elsevier Inc. All rights reserved.

Dipolar Waves as NMR maps of helices in proteins

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Michael F. Mesleh and Stanley J. OpellaCorresponding Author Contact Information, E-mail The Corresponding Author

Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA 92093, USA


Received 17 January 2003; 
revised 21 March 2003. 
Available online 21 May 2003.

Abstract

Dipolar Waves describe the periodic variation in the magnitudes of dipolar couplings in the backbone of a protein as a function of residue number. They provide a direct link between experimental measurements of dipolar couplings in aligned samples and the periodicity inherent in regular secondary structure elements. It is possible to identify the residues in a helix and the type of helix, deviations from ideality, and to orient the helices relative to an external axis in completely aligned samples and relative to each other in a common frame in weakly aligned samples with Dipolar Waves. They provide a tool for accurately describing helices and a step towards high throughput structure determination of proteins.

Article Outline

1. Introduction
2. Materials and methods
3. Results and discussion
4. Kinks and curves in α-helices
5. Dipolar Waves in experimental data
6. Determination of helix orientations
7. Conclusions
Acknowledgements
References










Corresponding Author Contact InformationCorresponding author. Fax: 1-858-822-4821


 
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