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: An artificial electron donor supported catalytic cycle of Pseudomonas putida cytochrome P450cam.
    Author: Prasad S, Murugan R, Mitra S.
    Journal: Biochem Biophys Res Commun; 2005 Sep 23; 335(2):590-5. PubMed ID: 16084834.
    Abstract:
    Putidaredoxin (PdX), the physiological effector of cytochrome P450cam (P450cam), serves to gate electron transfer into oxy-P450cam during the catalytic cycle of the enzyme. Redox-linked structural changes in PdX are necessary for the effective P450cam turnover reaction. PdX is believed to be difficult to be replaced by an artificial electron donor in the reaction pathway of P450cam. We demonstrate that the catalytic cycle of wild-type P450cam can be supported in the presence of an artificial reductant, potassium ferrocyanide. Upon rapid mixing of ferrocyanide ion with P450cam, we observed an intermediate with spectral features characteristic of compound I. The rate constant for the formation of compound I in the presence of ferrocyanide supported reaction cycle was found to be comparable to the ones observed for H2O2 supported compound I formation in wild-type P450cam, but was much lower than those observed for classical peroxidases. The results presented in this paper form the first kinetic analysis of this intermediate for an artificial electron-driven P450cam catalytic pathway in solution.
    [Abstract] [Full Text] [Related] [New Search]