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Syntheses, spectroscopic, structural characterization of Co(III) and Co(II) carboxylates and electron transfer reactions with ferrocene derivatives. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132572] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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2
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Farver O, Pecht I. Affinity Labeling of an Electron Transfer Pathway in Azurin by Cr(II) Ions. Isr J Chem 2013. [DOI: 10.1002/ijch.198100004] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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3
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Juhaniewicz J, Sek S. Peptide molecular junctions: Distance dependent electron transmission through oligoprolines. Bioelectrochemistry 2012; 87:21-7. [DOI: 10.1016/j.bioelechem.2011.11.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2011] [Revised: 11/13/2011] [Accepted: 11/28/2011] [Indexed: 11/16/2022]
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4
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Scholten U, Diserens C, Stoeckli-Evans H, Bernauer K, Meyer M, Stuppfler L, Lucas D. Reduction of Ferricytochrome c Catalyzed by Optically Active Chromium(III) Complexes. Inorg Chem 2009; 48:10942-53. [DOI: 10.1021/ic900330q] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ulrich Scholten
- Ecole d’Ingénieurs et d’Architectes de Fribourg, Département des Technologies Industrielles, Boulevard de Pérolles 80, Case Postale 32, 1705 Fribourg, Switzerland
| | - Céline Diserens
- Ecole d’Ingénieurs et d’Architectes de Fribourg, Département des Technologies Industrielles, Boulevard de Pérolles 80, Case Postale 32, 1705 Fribourg, Switzerland
| | - Helen Stoeckli-Evans
- Université de Neuchâtel, Institut de Physique, Rue Emile-Argand, 2009 Neuchâtel, Switzerland
| | - Klaus Bernauer
- Université de Neuchâtel, Institut de Chimie, Avenue de Bellevaux 51, Case Postale 158, 2009 Neuchâtel, Switzerland
| | - Michel Meyer
- Institut de Chimie Moléculaire de l’Université de Bourgogne (ICMUB), UMR 5260 du CNRS, 9 Avenue Alain Savary, Boîte Postale 47870, 21078 Dijon Cedex, France
| | - Ludovic Stuppfler
- Institut de Chimie Moléculaire de l’Université de Bourgogne (ICMUB), UMR 5260 du CNRS, 9 Avenue Alain Savary, Boîte Postale 47870, 21078 Dijon Cedex, France
| | - Dominique Lucas
- Institut de Chimie Moléculaire de l’Université de Bourgogne (ICMUB), UMR 5260 du CNRS, 9 Avenue Alain Savary, Boîte Postale 47870, 21078 Dijon Cedex, France
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Cohen MD, Prophete C, Sisco M, Chen LC, Zelikoff JT, Smee JJ, Holder AA, Crans DC. Pulmonary Immunotoxic Potentials of Metals Are Governed by Select Physicochemical Properties: Chromium Agents. J Immunotoxicol 2008; 3:69-81. [DOI: 10.1080/15476910600718434] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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6
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Metabolism of the carcinogen chromate by cellular constituents. STRUCTURE AND BONDING 2007. [DOI: 10.1007/bfb0111319] [Citation(s) in RCA: 203] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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7
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Isied SS. Long-Range Electron Transfer in Peptides and Proteins. PROGRESS IN INORGANIC CHEMISTRY 2007. [DOI: 10.1002/9780470166338.ch5] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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8
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9
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Stubbe J, Nocera DG, Yee CS, Chang MCY. Radical initiation in the class I ribonucleotide reductase: long-range proton-coupled electron transfer? Chem Rev 2003; 103:2167-201. [PMID: 12797828 DOI: 10.1021/cr020421u] [Citation(s) in RCA: 666] [Impact Index Per Article: 31.7] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- JoAnne Stubbe
- Department of Chemistry, 77 Massachusetts Avenue, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA.
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10
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Abstract
By observing changes in the absorbance spectrum between 340 and 650 nm, we found that tyrosyltyrosylphenylalanine (TTP) interacts with cytochrome C (CC). TTP caused the characteristic changes of CC reduction, namely, an increased optical density at 524 and 550 nm and a hyperchromic shift at 416 nm. The apparent dissociation constant (Kd) was 2.9 x 10(-3) M. Most of the reducible CC at 20 uM concentration was reduced by 10 mM TTP. TTP was more potent than all other peptides tested, including the previously reported tyrosylphenylalanine. That the carboxyl terminal phenyl group was essential for reduction was shown by comparing variously substituted di- and tripeptides. Reduction by TTP increased with increasing pH and buffer concentration at constant pH. A combination of superoxide dismutase and catalase failed to inhibit the reduction. We found no effect of TTP on O2 consumption of isolated intact mitochondria. Our data demonstrate that small peptides can serve as probes of the topography and electron density of CC and that the TTP-CC interaction may provide insight as an analog of in-vivo processes.
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Affiliation(s)
- C Simpkins
- District of Columbia General Hospital, Washington, D.C
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11
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Simpkins C. A new cytochrome C reducing dipeptide. J Natl Med Assoc 1990; 82:113-6. [PMID: 2154586 PMCID: PMC2625950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Using absorption spectroscopy, it has been found that tyrosylphenylalanine specifically reduces cytochrome C. This effect is pH and concentration dependent with the EC +/- SE = 4.42 x 10(-3) M. At 10(-2) 2 M, tyrosylphenylalanine caused reduction which was 50% complete. The same amino acids linked together in reverse order as phenylalanyltyrosine produced only a minimal effect. Tyrosine and phenylalanine alone, serylphenylalanine, formylphenylalanine, tyrosyllysine, and tyrosylarginine did not reduce cytochrome C. Comparison of tyrosylphenylalanine to tyrosylalanine and tyrosyltyrosine showed that the phenyl group is essential to reduction. This approach may illuminate some of the unanswered questions of the chemiosmotic theory of mitochondrial energy production.
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Affiliation(s)
- C Simpkins
- Department of Surgery, District of Columbia General Hospital, Washington, DC 20003
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12
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Jones GD, Wilson MT. A comparison of the reactions of cytochrome c oxidase, cytochrome c and azurin with Cr2+ ions. J Inorg Biochem 1984; 21:147-58. [PMID: 6330295 DOI: 10.1016/0162-0134(84)85047-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The reduction of cytochrome c oxidase (EC 1.9.3.1) by Cr2+ ions has been studied by stopped-flow spectrophotometry and is compared with the Cr2+ reduction of cytochrome c and azurin. The effects of temperature, pH, and added anions (e.g., SCN-) have been investigated. The behavior of the electron acceptor site of cytochrome c oxidase stands in contrast to that of the other redox proteins with regard to the effects of added anions and we suggest that this reflects the more buried nature of this site in the complex enzyme.
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13
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Abstract
51Cr2+ has been used as a probe to locate the electron entry site of bovine cytochrome c oxidase. The results of static titrations, column chromatography, and low pH LDS polyacrylamide gradient gel electrophoresis are reported. Of the protein subunits of cytochrome c oxidase, only subunit II is specifically labeled during electron transfer from Cr2+ to the electron accepting site. We therefore conclude that this site is located in subunit II. Our results provide experimental evidence to corroborate the view that this subunit is associated with redox centers of the enzyme, an hypothesis based on indirect evidence provided by the amino acid sequences and analogy with the bacterial enzyme.
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14
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15
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Richard M, Shaffer C, Evilia R. A cyclic voltammetric and stopped-flow study of five coordinate hemins in noncoordinating solvent: evidence for electron transfer through the axial ligand. Electrochim Acta 1982. [DOI: 10.1016/0013-4686(82)80097-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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16
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Intramolecular electron-hole transfer in binuclear transition metal compounds-theoretical methods and model studies. ACTA ACUST UNITED AC 1982. [DOI: 10.1007/bf00548699] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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17
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Farver O, Pecht I. Identification of an electron transfer locus in plastocyanin by chromium(II) affinity labeling. Proc Natl Acad Sci U S A 1981; 78:4190-3. [PMID: 6945578 PMCID: PMC319754 DOI: 10.1073/pnas.78.7.4190] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Cu(II)--plastocyanin from French beans (Phaseolus vulgaris) is reduced quantitatively by Cr(II)aq ions to give a substitution-inert Cr(III) adduct of Cu(I)--plastocyanin. Enzymatic proteolysis of this derivative by thermolysin led to the identification of the Cr(III) binding peptide. This contains four potential ligands for the metal ion: aspartate-42 and -44 and glutamate-43 and -45. In the three-dimensional fold of plastocyanin, this stretch is very close to tyrosine-83. The emission intensity and its pH dependence observed for the tyrosines in this tryptophan-devoid protein differ markedly in the Cr(III) adduct. That difference is interpreted as reflecting proximity and interaction between the latter metal ion and tyrosine-83. The distance between the copper center and the suggested Cr(III) binding site is approximately 12 A. The intervening region contains an array of highly invariant aromatic residues. These are proposed to be involved in the electron transfer process. A mechanism for that process is presented that involves interaction between the d electrons of the metal ions with d pi-pi* delocalization through a weakly coupled pi* system. The rationale of this electron transfer pathway for the reactivity of plastocyanin with inorganic redox agents is discussed.
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18
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Abstract
The effect of Cr2+ ions on the Tm (melting temperature) of DNA has been investigated under appropriate conditions for the stabilization of DNA by Mg2+ ions. A significant lowering of Tm, analogous to that observed for Cu2+ under normal conditions, was found, for Cr2+ at pH = 4.2 and [Mg2+] = 5.3 mol per mole of DNA base pair. Cu2+ also lowers Tm under similar conditions. The similarity of the effects of Cr2+ and Cu2+ under comparable conditions may be related to similarities in their coordination properties. It is proposed that Cr2+ and Cu2+ ions facilitate denaturation by holding together groups on the DNA chains in such a manner that base pairing and base stacking are inhibited. Comparative results for Cr3+ and Co2+ are also given for these low pH/Mg2+ ion conditions.
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19
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Borso CS, Stamatoff JB. Modification of the apparent radius of gyration of cytochrome c by the distribution of counterions in solution. Biopolymers 1980. [DOI: 10.1002/bip.1980.360191015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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20
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Petersen RL, Gupta RK. Location of Cr(III) in the Cr(III)--cytochrome c complex as observed by NMR spectroscopy. FEBS Lett 1979; 107:427-30. [PMID: 228980 DOI: 10.1016/0014-5793(79)80423-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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21
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Taborsky G, McCollum K. Phosphate binding by cytochrome c. Specific binding site involved in the formation and reactivity of a complex of ferricytochrome c, ferrous ion, and phosphate. J Biol Chem 1979. [DOI: 10.1016/s0021-9258(18)50285-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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22
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23
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Barber D, Parr SR, Greenwood C. The reduction of Pseudomonas cytochrome c551 oxidase by chromous ions. Biochem J 1977; 163:629-32. [PMID: 195577 PMCID: PMC1164743 DOI: 10.1042/bj1630629] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The reduction of cytochrome c551 oxidase from Pseudomonas aeruginosa by Cr2+ ions was followed in the stopped-flow apparatus at a number of wavelengths. The c-haem reduction proceeded in a biphasic fashion with second-order rate constants of 2.6 X 10(5)M-1-S-1 and 4.8 X 10(4)M-1-S-1 at 25 degrees C, whereas the biphasic reduction of the d1-haem appeared to be independent of reductant concentration with rate constants of approx. 1.0S-1 and 0.25S-1 respectively. The kinetically determined difference spectra (reduced minus oxidized) for the c- and d1-haems are presented.
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24
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Ondrechen MJ, Ratner MA. Intramolecular electron transfer in simple model systems: A propagator study. J Chem Phys 1977. [DOI: 10.1063/1.434002] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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25
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Mackey LN, Kuwana T. Spectroelectrochemical kinetic studies of cytochrome-c and cytochrome c oxidase. ACTA ACUST UNITED AC 1976. [DOI: 10.1016/0302-4598(76)80050-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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26
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Moore G, Williams R. The substance of this review was given at the Harden Conference, England, 1974. Coord Chem Rev 1976. [DOI: 10.1016/s0010-8545(00)82055-x] [Citation(s) in RCA: 102] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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27
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Lawrence GD, Spence JT. Model studies for molybdenum enzymes. The reduction of cytochrome c by molybdenum(V)-cysteine complexes. Biochemistry 1975; 14:3626-30. [PMID: 240386 DOI: 10.1021/bi00687a017] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The reduction of ferricytochrome c by two molybdenum(V)-cysteine complexes has been investigated as a model for electron transfer in the molybdenum enzymes sulfite oxidase and nitrate reductase. The reduction by the dioxo-bridged Mo(V)-cysteine complex, di-mu-oxo-bis-[oxo(L-cysteinato)molybdate(V)] (I), is relatively slow and its rate is first order in cyt cIII and zero order in I (k = (1.09 +/- 0.10) times 10(-3) sec minus 1, pH 7.5, 20 degrees). The reduction by the monoxo-bridged complex, mu-oxo-bis[oxodihydroxo(L-cysteinato)molybdate(V)] (II), is extremely rapid and its rate is first order in both reactants (k = (2.6 +/- 0.7) times 10(7) M minus 1 sec minus 1, pH 7.0, 25 degrees). Above pH 7.5, the reduction by II follows biphasic kinetics due to the fast reduction of a low pH form of cyt cIII and a slower reduction of a high pH form (at pH 10.0, 25 degrees, k = 2.9 times 10(6) M minus 1 sec minus 1 for the low pH form and k = 7.2 times 10(4) M minus 1 sec minus 1 for the high pH form). Reaction mechanisms for reductions by both I and II are proposed and the biological implications of the results, both for sulfite oxidase and mechanisms of electron transfer to cytochrome c, are discussed.
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28
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Dickinson LC, Chien JC. Cobalt-cytochrome c. I. Preparation, properties, and enzymic activity. Biochemistry 1975; 14:3526-34. [PMID: 169880 DOI: 10.1021/bi00687a003] [Citation(s) in RCA: 55] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
An improved procedure for the preparation of cobalt-cytochrome c has been developed. Various factors influencing the cobalt insertion process are discussed. The optical spectra of cobalt-cytochrome c suggest a six-coordinated species. The spectral shifts occurring with oxidation-reduction are compared with those observed for deoxy-cobaltohemoglobin and ferrocytochrome c and attributed to the effect of d(z2) electron on stereoelectronic interactions between the axial ligands and the porphyrin pi systems. Cobalt-cytochrome c has Em,7 = -140 +/- 20 mV as compared to an Em,7 of +250mV for ferrocytochrome c. An explanation for this negative Em,7 is offered. Cobaltocytochrome c is oxidized by cytochrome oxidase at about 45% of the rate for native cytochrome c. On the other hand cobalticytochrome c was not reduced by microsomal NADH or NADPH cytochrome c reductase nor by mitochondrial NADH or succinate cytochrome c reductase. It appears that the integrity of the reductase binding site is destroyed and the oxidase binding site has been modified by cobalt substitution.
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29
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Brittain T, Greenwood C. Kinetic studies on mammalian cytochrome c modified with 2-hydroxy-5-hydroxy-5-nitrobenzyl bromide. Biochem J 1975; 149:179-85. [PMID: 242320 PMCID: PMC1165604 DOI: 10.1042/bj1490179] [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: 12/14/2022]
Abstract
The reduction of 2-hydroxy-5-nitrobenzyl tryptophyl cytochrome c by the chromous ion was studied by stopped-flow techniques. At pH6.5 the reduction of 2-hydroxy-5-nitrobenzyl tryptophyl cytochrome c is complex, showing the presence of three distinct phases. Two chromium concentration-dependent phases are observed (1.1 X 10(5) M-1-S-1, phase 1; 1.25 X 10(4)M-1-S-1, phase 2) and one slow first-order process (0.25S-1, phase 3). A comparison of the static and kinetic difference spectra, along with the data from the reduction of the reoxidized reduced protein, suggests that the slow chromium concentration-independent phase is due to a slow conformational event after fast reduction of the NO2 group. The rates of the chromium concentration-dependent phases show a marked variation with pH above 7.5. The activation energies for the three processes were also measured at 33.2, 38.6 and 69.7 kJ-mol-1 for phases 1, 2 and 3 respectively. The reaction of reduced 2-hydroxy-5-nitrobenzyl tryptophyl cytochrome c with CO was foollowed by means of both stopped-flow and flash photolysis. The combination with CO at pH 6.8 as measured in stopped-flow experiments showed two phases, one CO-dependent phase (phase 2, 2.4 X 10(2)M-1-S-1) and one CO-independent phase (phase 1, 0.015S-1). Investigation of the pH-dependence of the phases showed both the rates and amounts of each phase to be pH-invariant. CO recombination, after photolytic removal, was found to be biphasic; a CO-dependent phase (phase 2, 2.4 X 10(2)M-1-S-1) and a CO-independent phase (phase 1, 1.0s-1) were observed. A tentative model which can accommodate these observations is proposed.
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30
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Creutz C, Sutin N. Kinetics of Ligand-binding and Oxidation-Reduction Reactions of Cytochrome c from Horse Heart and Candida krusei. J Biol Chem 1974. [DOI: 10.1016/s0021-9258(19)42127-3] [Citation(s) in RCA: 44] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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