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Ultrafast structural changes within a photosynthetic reaction centre
Nature (London), 2021-01, Vol.589 (7841), p.310-314
2021

Details

Autor(en) / Beteiligte
Titel
Ultrafast structural changes within a photosynthetic reaction centre
Ist Teil von
  • Nature (London), 2021-01, Vol.589 (7841), p.310-314
Ort / Verlag
England: Nature Publishing Group
Erscheinungsjahr
2021
Link zum Volltext
Beschreibungen/Notizen
  • Photosynthetic reaction centres harvest the energy content of sunlight by transporting electrons across an energy-transducing biological membrane. Here we use time-resolved serial femtosecond crystallography using an X-ray free-electron laser to observe light-induced structural changes in the photosynthetic reaction centre of Blastochloris viridis on a timescale of picoseconds. Structural perturbations first occur at the special pair of chlorophyll molecules of the photosynthetic reaction centre that are photo-oxidized by light. Electron transfer to the menaquinone acceptor on the opposite side of the membrane induces a movement of this cofactor together with lower amplitude protein rearrangements. These observations reveal how proteins use conformational dynamics to stabilize the charge-separation steps of electron-transfer reactions.
Sprache
Englisch
Identifikatoren
ISSN: 0028-0836, 1476-4687
eISSN: 1476-4687
DOI: 10.1038/s41586-020-3000-7
Titel-ID: cdi_swepub_primary_oai_gup_ub_gu_se_302298
Format
–
Schlagworte
Algae, analogs & derivatives, Bacteriochlorophylls, Bacteriochlorophylls - metabolism, Binding Sites, Binding Sites - drug effects, Biochemistry and Molecular Biology, Biochemistry, Molecular Biology, Biofysik, Biokemi och molekylärbiologi, Biophysics, Blastochloris viridis, chemistry, Chlorophyll, Chlorophyll - metabolism, Chlorophyll - radiation effects, Cofactors, Coherent light, Confidence, Crystallography, Cyanobacteria, Cytoplasm, Cytoplasm - metabolism, Diffraction, Diffraction patterns, drug effects, Electron density, Electron Transport, Electron Transport - drug effects, Electrons, enzymology, Hyphomicrobiaceae, Hyphomicrobiaceae - enzymology, Hyphomicrobiaceae - metabolism, Integral membrane proteins, Lasers, Life Sciences, Light, Light sources, metabolism, Methods, Microcrystals, Models, Molecular, Molecular, Natural history, Observations, Optical properties, Oxidation-Reduction, Oxidation-Reduction - radiation effects, Pheophytins, Pheophytins - metabolism, Photoexcitation, Photosynthesis, Photosynthetic Reaction Center Complex Proteins, Photosynthetic Reaction Center Complex Proteins - chemistry, Photosynthetic Reaction Center Complex Proteins - metabolism, Photosynthetic Reaction Center Complex Proteins - radiation effects, Photosynthetic reaction centers, Proteins, Protons, radiation effects, Speed, Statistical analysis, Statistical tests, Structural Biology, Structure, Strukturbiologi, Ubiquinone, Ubiquinone - analogs & derivatives, Ubiquinone - metabolism, Vitamin K 2, Vitamin K 2 - metabolism

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