Paramagnetic Effects on Nuclear Relaxation in Enzyme-Bound Co(II)–Adenine Nucleotide Complexes: Relative Contributions of Dipolar and Scalar Interactions

Paramagnetic Effects on Nuclear Relaxation in Enzyme-Bound Co(II)–Adenine Nucleotide Complexes: Relative Contributions of Dipolar and Scalar Interactions

31P NMR measurements on CoADP bound to creatine kinase designed to estimate the relative contribution of scalar and dipolar interactions to31P spin relaxation rates show that these rates are primarily due to distance-dependent dipolar interactions and that the contribution of the scalar interaction...

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Veröffentlicht in:Journal of magnetic resonance (1997) 1999-01, Vol.136 (1), p.130-133
Hauptverfasser: Ray, Bruce D., Jarori, Gotam K., Nageswara Rao, B.D.
Format: Artikel
Sprache:eng
Schlagworte:
adenine nucleotides
Adenine Nucleotides - chemistry
Adenosine Diphosphate - analogs & derivatives
Adenosine Diphosphate - chemistry
Anisotropy
ATP-utilizing enzymes
Binding Sites
Cations - analysis
Creatine Kinase - chemistry
enzyme–substrate interactions
Magnetic Resonance Spectroscopy
Magnetics
Models, Structural
Molecular Structure
paramagnetic cations
Phosphorus Isotopes
Spin Labels
spin relaxation
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Zusammenfassung:31P NMR measurements on CoADP bound to creatine kinase designed to estimate the relative contribution of scalar and dipolar interactions to31P spin relaxation rates show that these rates are primarily due to distance-dependent dipolar interactions and that the contribution of the scalar interaction is negligible.
ISSN:1090-7807
1096-0856
DOI:10.1006/jmre.1998.1625