| Literature DB >> 12323135 |
Tomasz Cierpicki1, Igor Zhukov, R Andrew Byrd, Jacek Otlewski.
Abstract
Analysis of amide proton temperature coefficients (deltasigma(HN)/DeltaT) in human ubiquitin shows their usefulness in indicating hydrogen bonds. The availability of a very accurate solution structure of ubiquitin enables the precise determination of hydrogen bonds and increases the reliability of the analysis of chemical shift temperature gradients. Values of deltasigma(HN)/DeltaT more positive than -4.6 ppb/K are very good indicators of hydrogen bonds. Additionally, a weak temperature dependence of non-hydrogen-bonded amides was observed for amide protons that are significantly shifted upfield. We observed that temperature gradients of amide protons involved in short hydrogen bonds are related to donor-acceptor distances.Entities:
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Year: 2002 PMID: 12323135 DOI: 10.1006/jmre.2002.2597
Source DB: PubMed Journal: J Magn Reson ISSN: 1090-7807 Impact factor: 2.229