Philosophical Transactions of the Royal Society B: Biological Sciences
Restricted accessReview article

The Mn4Ca photosynthetic water-oxidation catalyst studied by simultaneous X-ray spectroscopy and crystallography using an X-ray free-electron laser

Rosalie Tran

Rosalie Tran

Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

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Jan Kern

Jan Kern

Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA

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Johan Hattne

Johan Hattne

Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

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Sergey Koroidov

Sergey Koroidov

Institutionen för Kemi, Kemiskt Biologiskt Centrum, Umeå Universitet, Umeå, Sweden

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Julia Hellmich

Julia Hellmich

Institut für Biologie, Humboldt-Universität Berlin, Berlin 10099, Germany

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Roberto Alonso-Mori

Roberto Alonso-Mori

LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA

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Nicholas K. Sauter

Nicholas K. Sauter

Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

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Uwe Bergmann

Uwe Bergmann

LCLS, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA

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Johannes Messinger

Johannes Messinger

Institutionen för Kemi, Kemiskt Biologiskt Centrum, Umeå Universitet, Umeå, Sweden

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Athina Zouni

Athina Zouni

Institut für Biologie, Humboldt-Universität Berlin, Berlin 10099, Germany

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Junko Yano

Junko Yano

Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

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Vittal K. Yachandra

Vittal K. Yachandra

Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

[email protected]

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    The structure of photosystem II and the catalytic intermediate states of the Mn4CaO5 cluster involved in water oxidation have been studied intensively over the past several years. An understanding of the sequential chemistry of light absorption and the mechanism of water oxidation, however, requires a new approach beyond the conventional steady-state crystallography and X-ray spectroscopy at cryogenic temperatures. In this report, we present the preliminary progress using an X-ray free-electron laser to determine simultaneously the light-induced protein dynamics via crystallography and the local chemistry that occurs at the catalytic centre using X-ray spectroscopy under functional conditions at room temperature.

    Footnotes

    One contribution of 27 to a Discussion Meeting Issue ‘Biology with free-electron X-ray lasers’.

    References