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Inorganic Chemistry

Article . 1990 . Peer-reviewed

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Inorganic Chemistry

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Kinetic and thermodynamic study of the interactions of nickel(II) with nicotinamide adenine dinucleotide and nicotinamide adenine dinucleotide phosphate

descriptionPublicationkeyboard_double_arrow_right Article 01 Mar 1990Publisher:American Chemical Society (ACS)Journal:Inorganic Chemistry, volume 29, pages 1,143-1,147 (issn: 0020-1669, eissn: 1520-510X,

Authors: Joseph P. Bidwell; John Stuehr;

doi: 10.1021/ic00331a007

Kinetic and thermodynamic study of the interactions of nickel(II) with nicotinamide adenine dinucleotide and nicotinamide adenine dinucleotide phosphate

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Abstract

The equilibria and kinetics of Ni(II) interactions with the two pyridine coenzymes NAD and NADP were investigated by the temperature-jump relaxation technique. Three relaxation times for each system were detected, of which the two slower were characterized in detail as a function of metal ion and ligand concentrations and pH. Results were found to be consistent with a mechanism involving sequential formation of several different 1:1 metal ion complexes, including those in which the various ring systems participated with phosphate bonding. For NADP, a parallel series of steps involving the phosphate-protonated coenzyme was also present. Rate constants were compared to those for corresponding steps in simpler nucleotide and phosphate systems

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Case Western Reserve University
United States

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