Wright, John J. Fedor, Justin G. Hirst, Judy Roessler, Maxie M.
Published in
BMC Biology
BackgroundFor decades, semiquinone intermediates have been suggested to play an essential role in catalysis by one of the most enigmatic proton-pumping enzymes, respiratory complex I, and different mechanisms have been proposed on their basis. However, the difficulty in investigating complex I semiquinones, due to the many different enzymes embedde...
Wright, JJ Fedor, J Hirst, J Roessler, M
Background. For decades semiquinone intermediates have been suggested to play an essential role in catalysis by one of the most enigmatic proton-pumping enzymes, respiratory complex I, and different mechanisms have been proposed on their basis. However, the difficulty in investigating complex I semiquinones, due to the many different enzymes embedd...
Wright, John J. Fedor, Justin G. Hirst, Judy Roessler, Maxie M.
Abstract: Background: For decades, semiquinone intermediates have been suggested to play an essential role in catalysis by one of the most enigmatic proton-pumping enzymes, respiratory complex I, and different mechanisms have been proposed on their basis. However, the difficulty in investigating complex I semiquinones, due to the many different enz...
Sedoud, Arezki
Le photosystème II (PSII) est un complexe multi-protéique qui utilise l'énergie solaire pour oxyder l'eau et réduire des quinones. Le site catalytique d'oxydation de l'eau est localisé coté lumen du complexe, alors, que le site de réduction comprenant deux quinones (QA et QB) et un fer non-hémique est localisé sur le coté stromal du complexe membra...
SEDOUD, Arezki RUETHERFORD, Alfred william
Le photosystème II (PSII) est un complexe multi-protéique qui utilise l'énergie solaire pour oxyder l'eau et réduire des quinones. Le site catalytique d'oxydation de l'eau est localisé coté lumen du complexe, alors, que le site de réduction comprenant deux quinones (QA et QB) et un fer non-hémique est localisé sur le coté stromal du complexe membra...
SEDOUD, Arezki RUETHERFORD, Alfred william
FR
Ciofini, I. Reviakine, R. Arbuznikov, A. Kaupp, M.
Published in
Theoretical Chemistry Accounts
Density functional theory has been applied to study environmental effects on electronic g-tensors of a series of 1,4 semiquinone radical anions. In particular, solvent effects on solute structure, spin density distribution, and g-tensor have been investigated using both the conductor-like polarizable continuum model (CPCM) and explicit cluster solv...
Köhle, Heidrun Schuler, Paul Stegmann, Hartmut B. Roginsky, Vitaly A. Brucheltc, Gernot
Published in
Zeitschrift für Naturforschung C
6-Hydroxy-dopamine is easily oxidized in aqueous solutions within a pH range of 7-14. Depending on this parameter and the starting concentration of this catechol at least seven different paramagnetic species can be detected. Cyclization to two different indole derivatives of aminochrome type could be demonstrated and the mechanism of formation is d...
Stegmann, Hartmut B. Stolze, Klaus Scheffler, Klaus
Published in
Zeitschrift für Naturforschung B
The signs of the proton coupling constants of adrenalone semiquinone and related compounds were determined by ENDOR and TRIPLE resonance studies, thereby verifying the increment system described in our previous paper [2], Comparison of the spin-distribution of several substituted acylcatechols showed the conformational influence on the coupling con...
Peter, Martin G. Stegmann, Hartmut B. Dao-Ba, Hoang Scheffler, Klaus
Published in
Zeitschrift für Naturforschung C
ESR-spectra were recorded during the oxidation of N-acetyldopamine and N-β-alanyldopamine in aqueous solutions. Semiquinone radicals were detected under conditions of spin stabilization by Zn2+ ions. The appearance of the spectra was the same in the presence or in the absence of proteins. No evidence was obtained for the formation of products that ...
