Paramagnetic effects on nuclear relaxation in enzyme-bound Co(II)-adenine nucleotide complexes: relative contributions of dipolar and scalar interactions

J Magn Reson. 1999 Jan;136(1):130-3. doi: 10.1006/jmre.1998.1625.

Abstract

31P NMR measurements on CoADP bound to creatine kinase designed to estimate the relative contribution of scalar and dipolar interactions to 31P 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.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Adenine Nucleotides / chemistry*
  • Adenosine Diphosphate / analogs & derivatives*
  • Adenosine Diphosphate / chemistry
  • Anisotropy
  • Binding Sites
  • Cations / analysis
  • Creatine Kinase / chemistry*
  • Magnetic Resonance Spectroscopy*
  • Magnetics
  • Models, Structural
  • Molecular Structure
  • Phosphorus Isotopes
  • Spin Labels

Substances

  • Adenine Nucleotides
  • Cations
  • Phosphorus Isotopes
  • Spin Labels
  • Adenosine Diphosphate
  • cobalt adenosine diphosphate complex
  • Creatine Kinase