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Site-Directed Mutations Affecting Primary Photochemistry in Reaction Centers: Effects of Dissymmetry in the Special Pair

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Reaction Centers of Photosynthetic Bacteria

Part of the book series: Springer Series in Biophysics ((BIOPHYSICS,volume 6))

Abstract

The existence of the “special pair” (SP) of bacteriochlorophylls (BChl) was postulated nearly 20 years ago to describe the structural organization of the primary electron donor (P) of bacterial photosynthesis. The SP hypothesis was proposed based on magnetic resonance data measured for the oxidized radical cation of P in the bacterial reaction center (RC) protein (1,2). The SP concept was validated when detailed crystallographic data became available for the RCs from Rhodopseudomonas viridis and Rhodobacter sphaeroides (3–7). We now know that two strongly-interacting BChls with local C2 symmetry constitute the primary electron donor. Moreover, two monomeric BChls and two bacteriopheophytins (BPh) are related to each other about the same symmetry element. This structure reveals two prosthetic group chains, the L and M branches, that span the membrane.

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Author information

Authors and Affiliations

  1. Department of Biochemistry, Colorado State University, Fort Collins, CO, 80523, USA

    C. C. Schenck & D. Gaul

  2. Department of Chemistry, Stanford University, Stanford, California, 94305, USA

    M. Steffen & S. G. Boxer

  3. Department of Chemistry, Washington University, St. Louis, MO, 63130, USA

    L. McDowell, C. Kirmaier & D. Holten

Authors
  1. C. C. Schenck
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  2. D. Gaul
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  3. M. Steffen
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  4. S. G. Boxer
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  5. L. McDowell
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  6. C. Kirmaier
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  7. D. Holten
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Editor information

Editors and Affiliations

  1. Institut für Physikalische und Theoretische Chemie, Technische Universität München, Lichtenbergstraße 4, Garching, W 8046, Germany

    Maria-Elisabeth Michel-Beyerle

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© 1990 Springer-Verlag Berlin Heidelberg

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Schenck, C.C. et al. (1990). Site-Directed Mutations Affecting Primary Photochemistry in Reaction Centers: Effects of Dissymmetry in the Special Pair. In: Michel-Beyerle, ME. (eds) Reaction Centers of Photosynthetic Bacteria. Springer Series in Biophysics, vol 6. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-61297-8_23

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  • DOI: https://doi.org/10.1007/978-3-642-61297-8_23

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-64781-9

  • Online ISBN: 978-3-642-61297-8

  • eBook Packages: Springer Book Archive

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