High-Resolution Mn EXAFS of the Oxygen-Evolving Complex in Photosystem II: Structural Implications for the Mn4Ca Cluster. Yano, J., Pushkar, Y., Glatzel, P., Lewis, A., Sauer, K., Messinger, J., Bergmann, U., & Yachandra, V. Journal of the American Chemical Society, 127(43):14974–14975, November, 2005. Publisher: American Chemical Society![High-Resolution Mn EXAFS of the Oxygen-Evolving Complex in Photosystem II: Structural Implications for the Mn4Ca Cluster [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex The biological generation of oxygen by the oxygen-evolving complex in photosystem II (PS II) is one of nature's most important reactions. The recent X-ray crystal structures, while limited by resolutions of 3.2−3.5 Å, have located the electron density associated with the Mn4Ca cluster within the multiprotein PS II complex. Detailed structures critically depend on input from spectroscopic techniques, such as EXAFS and EPR/ENDOR, as the XRD resolution does not allow for accurate determination of the position of Mn/Ca or the bridging and terminal ligand atoms. The number and distances of Mn−Mn/Ca/ligand interactions determined from EXAFS provide important constraints for the structure of the Mn4Ca cluster. Here, we present data from a high-resolution EXAFS method using a novel multicrystal monochromator that show three short Mn−Mn distances between 2.7 and 2.8 Å and, hence, the presence of three di-μ-oxo-bridged units in the Mn4Ca cluster. This result imposes clear limitations on the proposed structures based on spectroscopic and diffraction data and provides input for refining such structures.
@article{yano_high-resolution_2005,
title = {High-{Resolution} {Mn} {EXAFS} of the {Oxygen}-{Evolving} {Complex} in {Photosystem} {II}: {Structural} {Implications} for the {Mn4Ca} {Cluster}},
volume = {127},
issn = {0002-7863},
shorttitle = {High-{Resolution} {Mn} {EXAFS} of the {Oxygen}-{Evolving} {Complex} in {Photosystem} {II}},
url = {https://doi.org/10.1021/ja054873a},
doi = {10.1021/ja054873a},
abstract = {The biological generation of oxygen by the oxygen-evolving complex in photosystem II (PS II) is one of nature's most important reactions. The recent X-ray crystal structures, while limited by resolutions of 3.2−3.5 Å, have located the electron density associated with the Mn4Ca cluster within the multiprotein PS II complex. Detailed structures critically depend on input from spectroscopic techniques, such as EXAFS and EPR/ENDOR, as the XRD resolution does not allow for accurate determination of the position of Mn/Ca or the bridging and terminal ligand atoms. The number and distances of Mn−Mn/Ca/ligand interactions determined from EXAFS provide important constraints for the structure of the Mn4Ca cluster. Here, we present data from a high-resolution EXAFS method using a novel multicrystal monochromator that show three short Mn−Mn distances between 2.7 and 2.8 Å and, hence, the presence of three di-μ-oxo-bridged units in the Mn4Ca cluster. This result imposes clear limitations on the proposed structures based on spectroscopic and diffraction data and provides input for refining such structures.},
number = {43},
urldate = {2024-11-29},
journal = {Journal of the American Chemical Society},
author = {Yano, Junko and Pushkar, Yulia and Glatzel, Pieter and Lewis, Azul and Sauer, Kenneth and Messinger, Johannes and Bergmann, Uwe and Yachandra, Vittal},
month = nov,
year = {2005},
note = {Publisher: American Chemical Society},
pages = {14974--14975},
}
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The recent X-ray crystal structures, while limited by resolutions of 3.2−3.5 Å, have located the electron density associated with the Mn4Ca cluster within the multiprotein PS II complex. Detailed structures critically depend on input from spectroscopic techniques, such as EXAFS and EPR/ENDOR, as the XRD resolution does not allow for accurate determination of the position of Mn/Ca or the bridging and terminal ligand atoms. The number and distances of Mn−Mn/Ca/ligand interactions determined from EXAFS provide important constraints for the structure of the Mn4Ca cluster. Here, we present data from a high-resolution EXAFS method using a novel multicrystal monochromator that show three short Mn−Mn distances between 2.7 and 2.8 Å and, hence, the presence of three di-μ-oxo-bridged units in the Mn4Ca cluster. 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