An artificial electron donor supported catalytic cycle of Pseudomonas putida cytochrome P450cam
IR@IICB: CSIR-Indian Institute of Chemical Biology, Kolkata
View Archive Info| Field | Value | |
| Title |
An artificial electron donor supported catalytic cycle
of Pseudomonas putida cytochrome P450cam
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| Creator |
Prasad, Swati
Murugan, Rajamanickam Mitra, Samaresh |
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| Subject |
Chemistry
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| Description |
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.
� 2005 Elsevier Inc. All rights reserved.
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| Publisher |
Elsevier
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| Date |
2005
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://www.eprints.iicb.res.in/308/1/BIOCHEMICAL_AND_BIOPHYSICAL_RESEARCH_COMMUNICATIONS_335(_2)_590%2D595_2005[22].pdf
Prasad, Swati and Murugan, Rajamanickam and Mitra, Samaresh (2005) An artificial electron donor supported catalytic cycle of Pseudomonas putida cytochrome P450cam. Biochemical and Biophysical Research Communications, 335. pp. 590-595. |
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| Relation |
http://dx.doi.org/10.1016/j.bbrc.2005.07.118
http://www.eprints.iicb.res.in/308/ |
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