The role of Buergi‐Dunitz interactions in the structural stability of proteins

Christian Fufezan

doi:10.1002/prot.22800

journal article Aug 16, 2010

The role of Buergi‐Dunitz interactions in the structural stability of proteins

Christian Fufezan

Proteins: Structure, Function, and Bioinformatics Vol. 78 No. 13 pp. 2831-2838 · Wiley

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Abstract

AbstractNonbonding interactions are essential for protein stability and maintenance of secondary structure. Their strength, however, is not always experimentally accessible. One example is the stability of collagen, which is in part due to Buergi‐Duntiz or n → π* interactions between the peptide backbone atoms [DeRider et al., J Am Chem Soc 2002;124:2497–2505]. Here, the overall frequency of n → π* interactions in proteins has been investigated. The analysis of a nonredundant set of protein structures showed that 45.1% of all residues have a backbone conformation favoring a n → π* nucleophilic attack between the carbonyl oxygen of residue i − 1 and the carbonyl carbon of residue i. These residues form a substantial fraction of right‐ and left‐handed α helices, 310 helices, π helices, and hydrogen bonded turns. Simulations showed that there are only four regions in Ramachandran space that favor backbone ni−1 → π interactions and these Φ, Ψ combinations are observed with high frequencies in the nonredundant protein structure set. Analysis of carbonyl carbon displacements out of the peptide plane in ultra‐high resolution protein structures indeed reveals the presence of the Buergi‐Dunitz trajectory. The Buergi‐Dunitz interaction thus appears to play an important and general role in protein structure stability that has not hitherto been fully explored. Proteins 2010. © 2010 Wiley‐Liss, Inc.

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Citations

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References

Details

Published: Aug 16, 2010
Vol/Issue: 78(13)
Pages: 2831-2838
License: View

Authors

C

Christian Fufezan

Funding

Deutsche Forschungsgemeinschaft

Cite This Article

Christian Fufezan (2010). The role of Buergi‐Dunitz interactions in the structural stability of proteins. Proteins: Structure, Function, and Bioinformatics, 78(13), 2831-2838. https://doi.org/10.1002/prot.22800

The role of Buergi‐Dunitz interactions in the structural stability of proteins

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