A heteronuclear correlation experiment for simultaneous determination of 15N longitudinal decay and chemical exchange rates of systems in slow equilibrium (original) (raw)

Summary

A heteronuclear correlation experiment is described which permits simultaneous characterization of both 15N longitudinal decay rates and slow conformational exchange rates. Data pertaining to the exchange between folded and unfolded forms of an SH3 domain is used to illustrate the technique. Because the unfolded form of the molecule, on average, shows significantly higher NH exchange rates than the folded form, and approach which minimizes the degree of water saturation is employed, enabling the extraction of accurate rate constants.

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Authors and Affiliations

1. Protein Engineering Network Centres of Excellence, University of Toronto, M5S 1A8, Toronto, ON, Canada
   Neil A. Farrow, Ouwen Zhang & Lewis E. Kay
2. Department of Molecular and Medical Genetics, University of Toronto, M5S 1A8, Toronto, ON, Canada
   Neil A. Farrow, Ouwen Zhang & Lewis E. Kay
3. Department of Biochemistry, University of Toronto, M5S 1A8, Toronto, ON, Canada
   Neil A. Farrow, Ouwen Zhang & Lewis E. Kay
4. Department of Chemistry, University of Toronto, M5S 1A8, Toronto, ON, Canada
   Neil A. Farrow, Ouwen Zhang & Lewis E. Kay
5. Division of Biochemistry Research, Hospital for Sick Children, 555 University Avenue, M5G 1X8, Toronto, ON, Canada
   Ouwen Zhang & Julie D. Forman-Kay

Authors

1. Neil A. Farrow
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2. Ouwen Zhang
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3. Julie D. Forman-Kay
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4. Lewis E. Kay
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Farrow, N.A., Zhang, O., Forman-Kay, J.D. et al. A heteronuclear correlation experiment for simultaneous determination of 15N longitudinal decay and chemical exchange rates of systems in slow equilibrium.J Biomol NMR 4, 727–734 (1994). https://doi.org/10.1007/BF00404280

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• Received: 25 April 1994
• Accepted: 27 May 1994
• Issue Date: September 1994
• DOI: https://doi.org/10.1007/BF00404280

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