Effects of methanol on the Si-state transitions in photosynthetic water-splitting. Nöring, B., Shevela, D., Renger, G., & Messinger, J. Photosynthesis Research, 98(1):251–260, October, 2008. ![Effects of methanol on the Si-state transitions in photosynthetic water-splitting [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex From a chemical point of view methanol is one of the closest analogues of water. Consistent with this idea EPR spectroscopy studies have shown that methanol binds at—or at least very close to—the Mn4OxCa cluster of photosystem II (PSII). In contrast, Clark-type oxygen rate measurements demonstrate that the O2 evolving activity of PSII is surprisingly unaffected by methanol concentrations of up to 10%. Here we study for the first time in detail the effect of methanol on photosynthetic water-splitting by employing a Joliot-type bare platinum electrode. We demonstrate a linear dependence of the miss parameter for Sistate advancement on the methanol concentrations in the range of 0–10% (v/v). This finding is consistent with the idea that methanol binds in PSII with similar affinity as water to one or both substrate binding sites at the Mn4OxCa cluster. The possibility is discussed that the two substrate water molecules bind at different stages of the cycle, one during the S4 → S0 and the other during the S2 → S3 transition.
@article{noring_effects_2008,
title = {Effects of methanol on the {Si}-state transitions in photosynthetic water-splitting},
volume = {98},
issn = {1573-5079},
url = {https://doi.org/10.1007/s11120-008-9364-4},
doi = {10.1007/s11120-008-9364-4},
abstract = {From a chemical point of view methanol is one of the closest analogues of water. Consistent with this idea EPR spectroscopy studies have shown that methanol binds at—or at least very close to—the Mn4OxCa cluster of photosystem II (PSII). In contrast, Clark-type oxygen rate measurements demonstrate that the O2 evolving activity of PSII is surprisingly unaffected by methanol concentrations of up to 10\%. Here we study for the first time in detail the effect of methanol on photosynthetic water-splitting by employing a Joliot-type bare platinum electrode. We demonstrate a linear dependence of the miss parameter for Sistate advancement on the methanol concentrations in the range of 0–10\% (v/v). This finding is consistent with the idea that methanol binds in PSII with similar affinity as water to one or both substrate binding sites at the Mn4OxCa cluster. The possibility is discussed that the two substrate water molecules bind at different stages of the cycle, one during the S4 → S0 and the other during the S2 → S3 transition.},
language = {en},
number = {1},
urldate = {2024-11-29},
journal = {Photosynthesis Research},
author = {Nöring, Birgit and Shevela, Dmitriy and Renger, Gernot and Messinger, Johannes},
month = oct,
year = {2008},
keywords = {Manganese cluster, Methanol, Oxygen evolution, Photosystem II, Water-splitting},
pages = {251--260},
}
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