Structural dynamics in the water and proton channels of photosystem II during the S2 to S3 transition

Structural dynamics in the water and proton channels of photosystem II during the S2 to S3 transition

The oxygen-evolving complex in Photosystem II (PSII) catalyzes the light-driven oxidation of water to oxygen and it is still under debate how the water reaches the active site. Here, the authors analyse time-resolved XFEL-based crystal structures of PSII that were determined at room temperature and...

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Autores principales: Rana Hussein, Mohamed Ibrahim, Asmit Bhowmick, Philipp S. Simon, Ruchira Chatterjee, Louise Lassalle, Margaret Doyle, Isabel Bogacz, In-Sik Kim, Mun Hon Cheah, Sheraz Gul, Casper de Lichtenberg, Petko Chernev, Cindy C. Pham, Iris D. Young, Sergio Carbajo, Franklin D. Fuller, Roberto Alonso-Mori, Alex Batyuk, Kyle D. Sutherlin, Aaron S. Brewster, Robert Bolotovsky, Derek Mendez, James M. Holton, Nigel W. Moriarty, Paul D. Adams, Uwe Bergmann, Nicholas K. Sauter, Holger Dobbek, Johannes Messinger, Athina Zouni, Jan Kern, Vittal K. Yachandra, Junko Yano
Formato: article
Lenguaje:EN
Publicado: Nature Portfolio 2021
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Acceso en línea:https://doaj.org/article/e99f27723f2f4e5b914b63bf6c2509c8
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Sumario:The oxygen-evolving complex in Photosystem II (PSII) catalyzes the light-driven oxidation of water to oxygen and it is still under debate how the water reaches the active site. Here, the authors analyse time-resolved XFEL-based crystal structures of PSII that were determined at room temperature and report the structures of the waters in the putative channels surrounding the active site at various time-points during the reaction cycle and conclude that the O1 channel is the likely water intake pathway and the Cl1 channel the likely proton release pathway.

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