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Elsevier, Biophysical Journal, 9(97), p. 2604-2612, 2009

DOI: 10.1016/j.bpj.2009.07.052

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Spectral Diffusion and Electron-Phonon Coupling of the B800 BChl a Molecules in LH2 Complexes from Three Different Species of Purple Bacteria

Journal article published in 2009 by J. Baier, M. Gabrielsen ORCID, S. Oellerich, H. Michel, M. van Heel, R. J. Cogdell, J. Köhler
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This paper is available in a repository.

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Abstract

We have investigated the spectral diffusion and the electron-phonon coupling of B800 bacteriochlorophyll a molecules in the peripheral light-harvesting complex LH2 for three different species of purple bacteria, Rhodobacter sphaeroides, Rhodospirillum molischianum, and Rhodopseudomonas acidophila. We come to the conclusion that B800 binding pockets for Rhodobacter sphaeroides and Rhodopseudomonas acidophila are rather similar with respect to the polarity of the protein environment but that the packaging of the alphabeta-polypeptides seems to be less tight in Rb. sphaeroides with respect to the other two species.