Excitation energy flow in chlorosome antennas of green photosynthetic bacteria

Mamoru Mimuro, Tsunenori Nozawa, Naoto Tamai, Keizou Shimada, Iwao Yamazaki, Su Lin, Robert S. Knox, Bruce P. Wittmershaus, Daniel C. Brune, Robert E. Blankenship

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89 Scopus citations

Abstract

Energy flow in whole cells of the thermophilic green photosynthetic bacterium Chloroflexus aurantiacus was studied by measurements of time-resolved fluorescence spectra in the picosecond time range, detected by both streak camera and single-photon counting methods. These data characterize the energy-transfer sequence from bacteriochlorophyll c (BChl c), found in membrane-associated antenna structures called chlorosomes, to BChl a in the chlorosome baseplate, then to a BChl a antenna complex in the cytoplasmic membrane, and finally to the photochemical reaction center. Upon selective excitation of BChl c in chlorosomes, the decay time of the emission arising from BChl c was 16 ps. The apparent rise time of the emission from the baseplate pigment was <3 ps.

Original languageEnglish (US)
Pages (from-to)7503-7509
Number of pages7
JournalJournal of physical chemistry
Volume93
Issue number21
DOIs
StatePublished - 1989

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physical and Theoretical Chemistry

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    Mimuro, M., Nozawa, T., Tamai, N., Shimada, K., Yamazaki, I., Lin, S., Knox, R. S., Wittmershaus, B. P., Brune, D. C., & Blankenship, R. E. (1989). Excitation energy flow in chlorosome antennas of green photosynthetic bacteria. Journal of physical chemistry, 93(21), 7503-7509. https://doi.org/10.1021/j100358a047