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Effect of Orbital Asymmetry in P•+ on Electron Transfer in Reaction Centers of Rb. sphaeroides

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The Reaction Center of Photosynthetic Bacteria

Abstract

The cation radical of the primary donor, P•+, has been investigated in a set of mutants of Rb. sphaeroides with different hydrogen bonds to the special pair, using EPR/ENDOR spectroscopy. The results show that these mutants exhibit large variations in the distribution of the unpaired electron between the dimer halves of P dependent on the hydrogen bond situation. The comparison with the electron transfer rate from cytochrom c2 to P•+ reveals a correlation of this rate with the fraction of the unpaired electron on the L-half of the dimer. The implications of this finding for the electron pathway of this reaction are discussed.

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Author information

Authors and Affiliations

  1. Max-Volmer-Institut für Biophysikalische und Physikalische Chemie, Technische Universität Berlin, Straße des 17. Juni 135, D-10623, Berlin, Germany

    J. Rautter, F. Lendzian & W. Lubitz

  2. Department of Chemistry and Biochemistry, Center for the Study of Early Events in Photosynthesis, Arizona State University, 85287-1604, Tempe, Arizona, USA

    X. Lin, J. C. Williams & J. P. Allen

Authors
  1. J. Rautter
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  2. F. Lendzian
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  3. X. Lin
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  4. J. C. Williams
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  5. J. P. Allen
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  6. W. Lubitz
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Editors and Affiliations

  1. Institut für Physikalische und Theoretische Chemie, Technische Universität München, Lichtenbergstraße 4, D - 85748, Garching, Germany

    Maria-Elisabeth Michel-Beyerle

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© 1996 Springer-Verlag Berlin Heidelberg

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Rautter, J., Lendzian, F., Lin, X., Williams, J.C., Allen, J.P., Lubitz, W. (1996). Effect of Orbital Asymmetry in P•+ on Electron Transfer in Reaction Centers of Rb. sphaeroides . In: Michel-Beyerle, ME. (eds) The Reaction Center of Photosynthetic Bacteria. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-61157-5_4

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  • DOI: https://doi.org/10.1007/978-3-642-61157-5_4

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-64723-9

  • Online ISBN: 978-3-642-61157-5

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