| Autor: |
Dods, Robert, Båth, Petra, Morozov, Dmitry, Gagnér, Viktor Ahlberg, Arnlund, David, Luk, Hoi Ling, Kübel, Joachim, Maj, Michał, Vallejos, Adams, Wickstrand, Cecilia, Bosman, Robert, Beyerlein, Kenneth R., Nelson, Garrett, Liang, Mengning, Milathianaki, Despina, Robinson, Joseph, Harimoorthy, Rajiv, Berntsen, Peter, Malmerberg, Erik, Johansson, Linda |
| Zdroj: |
Nature; 1/14/2021, Vol. 589 Issue 7841, p310-314, 5p |
| Abstrakt: |
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 crystallography1 using an X-ray free-electron laser2 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. Time-resolved serial femtosecond crystallography is used to reveal the structural changes that stabilize the charge-separation steps of electron-transfer reactions in the photosynthetic reaction centre of Blastochloris viridis on a timescale of picoseconds. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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