Literature DB >> 2990555

Electron nuclear double resonance of semiquinones in reaction centers of Rhodopseudomonas sphaeroides.

W Lubitz, E C Abresch, R J Debus, R A Isaacson, M Y Okamura, G Feher.   

Abstract

Replacement of Fe2+ by Zn2+ in reaction centers of Rhodopseudomonas sphaeroides enabled us to perform ENDOR (electron nuclear double resonance) experiments on the anion radicals of the primary and secondary ubiquinone acceptors (QA- and QB-. Differences between the QA and QB sites, hydrogen bonding to the oxygens, interactions with the protons of the proteins and some symmetry properties of the binding sites were deduced from an analysis of the ENDOR spectra.

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Year:  1985        PMID： 2990555     DOI： 10.1016/0005-2728(85)90155-0

Source DB:  PubMed          Journal:  Biochim Biophys Acta        ISSN： 0006-3002


  9 in total

1.  A caged, destabilized, free radical intermediate in the q-cycle.

Authors:  Preethi R Vennam; Nicholas Fisher; Matthew D Krzyaniak; David M Kramer; Michael K Bowman
Journal:  Chembiochem       Date:  2013-09-05       Impact factor: 3.164

2.  George Feher: a pioneer in reaction center research.

Authors:  Melvin Okamura
Journal:  Photosynth Res       Date:  2013-10-09       Impact factor: 3.573

3.  Pulse Q-band EPR and ENDOR spectroscopies of the photochemically generated monoprotonated benzosemiquinone radical in frozen alcoholic solution.

Authors:  Marco Flores; Melvin Y Okamura; Jens Niklas; Maria-Eirini Pandelia; Wolfgang Lubitz
Journal:  J Phys Chem B       Date:  2012-07-20       Impact factor: 2.991

4.  Determination of the proton environment of high stability Menasemiquinone intermediate in Escherichia coli nitrate reductase A by pulsed EPR.

Authors:  Stéphane Grimaldi; Rodrigo Arias-Cartin; Pascal Lanciano; Sevdalina Lyubenova; Rodolphe Szenes; Burkhard Endeward; Thomas F Prisner; Bruno Guigliarelli; Axel Magalon
Journal:  J Biol Chem       Date:  2011-12-21       Impact factor: 5.157

5.  Isotope effect on electron transfer in reaction centers from Rhodopseudomonas sphaeroides.

Authors:  M Y Okamura; G Feher
Journal:  Proc Natl Acad Sci U S A       Date:  1986-11       Impact factor: 11.205

6.  Electron paramagnetic resonance investigation of photosynthetic reaction centers from Rhodobacter sphaeroides R-26 in which Fe2+ was replaced by Cu2+. Determination of hyperfine interactions and exchange and dipole-dipole interactions between Cu2+ and QA-.

Authors:  R Calvo; M C Passeggi; R A Isaacson; M Y Okamura; G Feher
Journal:  Biophys J       Date:  1990-07       Impact factor: 4.033

7.  Protein-cofactor interactions in bacterial reaction centers from Rhodobacter sphaeroides R-26: II. Geometry of the hydrogen bonds to the primary quinone formula by 1H and 2H ENDOR spectroscopy.

Authors:  M Flores; R Isaacson; E Abresch; R Calvo; W Lubitz; G Feher
Journal:  Biophys J       Date:  2006-10-27       Impact factor: 4.033

8.  Electronic structure of Q-A in reaction centers from Rhodobacter sphaeroides. I. Electron paramagnetic resonance in single crystals.

Authors:  R A Isaacson; F Lendzian; E C Abresch; W Lubitz; G Feher
Journal:  Biophys J       Date:  1995-08       Impact factor: 4.033

9.  Protein-cofactor interactions in bacterial reaction centers from Rhodobacter sphaeroides R-26: I. Identification of the ENDOR lines associated with the hydrogen bonds to the primary quinone QA*-.

Authors:  M Flores; R Isaacson; E Abresch; R Calvo; W Lubitz; G Feher
Journal:  Biophys J       Date:  2006-02-10       Impact factor: 4.033
  9 in total

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