Spectrally silent light induced conformation change in photosynthetic reaction centers

László Nagy, P. Maróti, Masahide Terazima

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Spectrally silent conformation change after photoexcitation of photosynthetic reaction centers isolated from Rhodobacter sphaeroides R-26 was observed by the optical heterodyne transient grating technique. The signal showed spectrally silent structural change in photosynthetic reaction centers followed by the primary P+BPh- charge separation and this change remains even after the charge recombination. Without bound quinone to the RC, the conformation change relaxes with about 28 μs lifetime. The presence of quinone at the primary quinone (QA) site may suppress this conformation change. However, a weak relaxation with 30-40 μs lifetime is still observed under the presence of QA, which increases up to 40 μs as a function of the occupancy of the secondary quinone (QB) site.

Original languageEnglish
Pages (from-to)3657-3662
Number of pages6
JournalFEBS Letters
Volume582
Issue number25-26
DOIs
Publication statusPublished - Oct 29 2008

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Photosynthetic Reaction Center Complex Proteins
Conformations
Light
Rhodobacter sphaeroides
Photoexcitation
Genetic Recombination
benzoquinone

Keywords

  • Heterodyne detection
  • Reaction center
  • Transient grating

ASJC Scopus subject areas

  • Biochemistry
  • Biophysics
  • Cell Biology
  • Genetics
  • Molecular Biology
  • Structural Biology

Cite this

Spectrally silent light induced conformation change in photosynthetic reaction centers. / Nagy, László; Maróti, P.; Terazima, Masahide.

In: FEBS Letters, Vol. 582, No. 25-26, 29.10.2008, p. 3657-3662.

Research output: Contribution to journalArticle

Nagy, László ; Maróti, P. ; Terazima, Masahide. / Spectrally silent light induced conformation change in photosynthetic reaction centers. In: FEBS Letters. 2008 ; Vol. 582, No. 25-26. pp. 3657-3662.
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