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Cytochromes: Reactivity of the “dark side” of the heme. Biophys Chem 2010; 152:21-7. [DOI: 10.1016/j.bpc.2010.09.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2010] [Revised: 09/27/2010] [Accepted: 09/27/2010] [Indexed: 01/16/2023]
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Kapetanaki SM, Silkstone G, Husu I, Liebl U, Wilson MT, Vos MH. Interaction of Carbon Monoxide with the Apoptosis-Inducing Cytochrome c−Cardiolipin Complex. Biochemistry 2009; 48:1613-9. [DOI: 10.1021/bi801817v] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Sofia M. Kapetanaki
- Laboratoire d’Optique et Biosciences, CNRS, Ecole Polytechnique, and INSERM U696, F-91128 Palaiseau, France, and Department of Biological Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, United Kingdom
| | - Gary Silkstone
- Laboratoire d’Optique et Biosciences, CNRS, Ecole Polytechnique, and INSERM U696, F-91128 Palaiseau, France, and Department of Biological Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, United Kingdom
| | - Ivan Husu
- Laboratoire d’Optique et Biosciences, CNRS, Ecole Polytechnique, and INSERM U696, F-91128 Palaiseau, France, and Department of Biological Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, United Kingdom
| | - Ursula Liebl
- Laboratoire d’Optique et Biosciences, CNRS, Ecole Polytechnique, and INSERM U696, F-91128 Palaiseau, France, and Department of Biological Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, United Kingdom
| | - Michael T. Wilson
- Laboratoire d’Optique et Biosciences, CNRS, Ecole Polytechnique, and INSERM U696, F-91128 Palaiseau, France, and Department of Biological Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, United Kingdom
| | - Marten H. Vos
- Laboratoire d’Optique et Biosciences, CNRS, Ecole Polytechnique, and INSERM U696, F-91128 Palaiseau, France, and Department of Biological Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, United Kingdom
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Varhac R, Antalík M. Determination of the pK for the acid-induced denaturation of ferrocytochrome c. Biochemistry 2004; 43:3564-9. [PMID: 15035626 DOI: 10.1021/bi036011x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Optical absorption spectroscopy was used to characterize the acid-induced conformational transition of horse heart ferrocytochrome c in the presence of urea. By using linear extrapolation to zero denaturant concentration, an apparent pK value for denaturation was found to be 0.86 +/- 0.07 at 25 degrees C. Visible absorption spectra in the presence of high urea concentration indicate that the dominant population is a high-spin, five-coordinate form under acidic conditions. Ferricytochrome c, used as a model reference system, shows a linear dependence of pK values versus urea concentration in the range from 0 to 4.1 M. Our data also indicate that even at a pH below 2 the iron-sulfur bond in ferrocytochrome c is present.
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Affiliation(s)
- Rastislav Varhac
- Department of Biophysics, Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 043 53 Kosice, Slovakia
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Other Heterocyclic Drugs. ACTA ACUST UNITED AC 1977. [DOI: 10.1016/b978-0-12-721840-3.50013-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Greenwood C, Moore TA. An investigation of protein conformation of cytochrome c by using cytochrome c insolubilized on to agarose gel. Biochem J 1976; 153:159-63. [PMID: 6001 PMCID: PMC1172558 DOI: 10.1042/bj1530159] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Cytochrome c insolubilized on to agarose gel was shown to be more resistant to denaturation and carboxymethylation than the soluble protein. These differences are discussed both with respect to the conformational changes that take place during denaturation of cytochrome c and with respect to the pH-dependent forms of carboxymethyl-cytochrome c.
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