These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Reaction of copper-zinc superoxide dismutase with diethyldithiocarbamate.
    Author: Misra HP.
    Journal: J Biol Chem; 1979 Nov 25; 254(22):11623-8. PubMed ID: 227874.
    Abstract:
    Diethyldithiocarbamate reacted with superoxide dismutase from bovine erythrocytes. Changes in both optical and esr spectra, which accompanied this reaction, indicated involvement of the Cu(II). The reaction was accelerated by raising the concentrations of the reactants, elevating the temperature, and lowering the pH, in the range 10.2 to 5.5, and it was independent of the presence of oxygen. During the first phase of this reaction the Cu(II).diethyldithiocarbamate complex remained bound to the enzyme and the catalytic activity did not diminish. There followed a second and slower process which was accompanied by the appearance of colloidal Cu(II).chelate complex and by a loss of activity which could be restored by the addition of CuSO4. All of the observations are accomodated by a model in which 1 diethyldithiocarbamate molecule reacts/copper center, with retention of activity, in Phase I, while a second diethyldithiocarbamate displaces the copper, with a loss of activity, in Phase II.
    [Abstract] [Full Text] [Related] [New Search]