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Structural dependencies of h3JNC' scalar coupling in protein H-bond chains. | LitMetric

Structural dependencies of h3JNC' scalar coupling in protein H-bond chains.

J Am Chem Soc

Department of Biochemistry and Molecular Biology, Mayo Graduate School, Mayo Clinic and Foundation, Rochester, MN 55905, USA.

Published: November 2002

AI Article Synopsis

Article Abstract

The H-bond ((h3)J(NC')) and peptide bond ((1)J(NC')) scalar couplings establish connectivity of the electronic structure in the H-bond chains of proteins. The correlated changes of (h3)J(NC') and (1)J(NC') couplings extend over several peptide groups in the chains. Consequently, the electronic structure of the H-bond chains can affect (h3)J(NC') in a manner that is independent of the local H-bond geometry. By taking this into account, and by using a more complete set of H-bond geometry parameters, we have predicted (h3)J(NC') couplings in the H-bond chains with deviations commensurate to the standard deviations of the experimentally determined values. We have created a comprehensive database of (h3)J(NC') and (1)J(NC') couplings by measuring the coupling constants in ubiquitin (alphabeta-fold) intestinal fatty acid binding protein (beta-barrel) and carp parvalbumin (alpha-helical).

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Source
http://dx.doi.org/10.1021/ja0273288DOI Listing

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