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Showing 1 to 7 of 7 for “"Quinol oxidation"”.
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Quinol oxidation by the ubiquinol:cytochrome c(2) oxidoreductase in the chromatophores from Rhodobacter sphaeroides
The kinetics and thermodynamics of the high potential chain in the chromatophores from Rhodobacter sphaeroides have been reexamined. It was found that RC, cyt c$\sb2$ and c$\sb1$ after a flash reached a state not far from the expected ideal equilibrium under the conditions of our experiments.
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Exploring the Quinol Oxidation Mechanism at the Qo-Site of Bc1 Complex Through Site-Directed Mutagenesis
The backbone amide groups of FL132 and FC134 give additional electron withdrawing force to the Rieske-type [2Fe-2S] cluster and the residues in the 132-134 positions play roles in anchoring the ISP to the surface of the Qo-pocket. FG133 has unique ϕ/psi angles that restrict the positions of …
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Electron gating and mechanism of proton exit in quinol oxidation in cyt bc1 complex from R. sphaeroides
… this residue in the second electron transfer of quinol oxidation at the Qo-site. Previous studies showed that mutation at this position resulted to a substantially inhibited electron transfer, while the bypass rates were equal to or less than the wild-type strain. In addition, these strains …
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Investigating Cytochromes in Photosynthetic Electron Transport in Cyanobacteria
… in cytochrome b6 that participate in plastoquinol and inhibitor binding at the plastoquinol oxidation site of the cytochrome bf complex. This study served as a basis for developing a structural model of binding sites for several inhibitors of quinol-oxidation in cytochrome b 6, which may be …
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Molecular genetic manipulation and characterization of the high-potential chain of cyclic electron transport in Rhodobacter sphaeroides
… of the cluster, is replaced by aspartate, quinol oxidation is specifically impaired at the Q$\sb{\rm o}$ site.
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The Structure-Function Interface in the Cytochrome Bc1 Complex Family
… b6f complexes belong to a common family of quinol oxidizing enzymes. We have made a systematic survey of the redox subunits of the bc-type quinol oxidases for all known bacterial sequences and have identified six new representatives of the enzyme. Sequences of the subunits containing the …
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Theoretical study of the cytochrome bc1 complex reaction mechanism
… which is well established and operates via quinol substrates that bind the protein at their active sites. Despite decades of research, the quinol-protein interaction that initiates the Q-cycle has not yet been completely described. Furthermore, the initial charge transfer reactions that take …