ArticleProceedings of the National Academy of Sciences of the United States of America2006
Time-resolved vibrational spectroscopy detects protein-based intermediates in the photosynthetic oxygen-evolving cycle.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2006. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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17 citing papers in PubMed.
- Energetics and Kinetics of S-State Transitions Monitored by Delayed Chlorophyll Fluorescence.Frontiers in plant science · 2019Article
- Time-resolved infrared spectroscopy in the study of photosynthetic systems.Photosynthesis research · 2017Review
- An intrinsically disordered photosystem II subunit, PsbO, provides a structural template and a sensor of the hydrogen-bonding network in photosynthetic water oxidation.The Journal of biological chemistry · 2013Article
- Radiolytic mapping of solvent-contact surfaces in Photosystem II of higher plants: experimental identification of putative water channels within the photosystem.The Journal of biological chemistry · 2013Article
- Detection of an intermediary, protonated water cluster in photosynthetic oxygen evolution.Proceedings of the National Academy of Sciences of the United States of America · 2013Article
- Alternating electron and proton transfer steps in photosynthetic water oxidation.Proceedings of the National Academy of Sciences of the United States of America · 2012Article
- A hydrogen-bonding network plays a catalytic role in photosynthetic oxygen evolution.Proceedings of the National Academy of Sciences of the United States of America · 2012Article
- Azide as a probe of proton transfer reactions in photosynthetic oxygen evolution.Biophysical journal · 2008Article
- Light-induced dynamics in photosystem I electron transfer.Biophysical journal · 2008Article
- Proton-coupled electron transfer.Chemical reviews · 2007Review
- Oxidative photosynthetic water splitting: energetics, kinetics and mechanism.Photosynthesis research · 2007Review
- Time-resolved X-ray spectroscopy leads to an extension of the classical S-state cycle model of photosynthetic oxygen evolution.Photosynthesis research · 2007Article
- Perturbations at the chloride site during the photosynthetic oxygen-evolving cycle.Photosynthesis research · 2007Article
- Light-induced FTIR difference spectroscopy as a powerful tool toward understanding the molecular mechanism of photosynthetic oxygen evolution.Photosynthesis research · 2007Review
- Calcium exchange and structural changes during the photosynthetic oxygen evolving cycle.Biophysical journal · 2006Article
- A time-resolved vibrational spectroscopy glimpse into the oxygen-evolving complex of photosynthesis.Proceedings of the National Academy of Sciences of the United States of America · 2006Article
- Proton coupled electron transfer and redox active tyrosines in Photosystem II.Journal of photochemistry and photobiology. B, BiologyReview
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6 authors.
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Abstract
Photosynthetic oxygen production by photosystem II (PSII) is responsible for the maintenance of aerobic life on earth. The production of oxygen occurs at the PSII oxygen-evolving complex (OEC), which contains a tetranuclear manganese (Mn) cluster. Photo-induced electron transfer events in the reaction center lead to the accumulation of oxidizing equivalents on the OEC. Four sequential photooxidation reactions are required for oxygen production. The oxidizing complex cycles among five oxidation states, called the S(n) states, where n refers to the number of oxidizing equivalents stored. Oxygen release occurs during the S(3)-to-S(0) transition from an unstable intermediate, known as the S(4) state. In this report, we present data providing evidence for the production of an intermediate during each S state transition. These protein-derived intermediates are produced on the microsecond to millisecond time scale and are detected by time-resolved vibrational spectroscopy on the microsecond time scale. Our results suggest that a protein-derived conformational change or proton transfer reaction precedes Mn redox reactions during the S(2)-to-S(3) and S(3)-to-S(0) transitions.
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