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Title: Creation of a 3Mn/1Fe cluster in the oxygen-evolving complex of photosystem II and investigation of its functional activity

Abstract

Extraction of Mn cations from the oxygen-evolving complex (OEC) of Ca-depleted PSII membranes (PSII[-Ca,4Mn]) by reductants like hydroquinone (H2Q) occurs with lower efficiency at acidic pH (2Mn/reaction center [RC] are extracted at pH 5.7) than at neutral pH (3Mn/RC are extracted at pH 6.5) [Semin et al. Photosynth. Res. 125 (2015) 95]. Fe(II) also extracts Mn cations from PSII(-Ca,4Mn), but only 2Mn/RC at pH 6.5, forming a heteronuclear 2Mn/2Fe cluster [Semin and Seibert, J. Bioenerg. Biomembr. 48 (2016) 227]. Here we investigated the efficiency of Mn extraction by Fe(II) at acidic pH and found that Fe(II) cations can extract only 1Mn/RC from PSII(-Ca,4Mn) membranes at pH 5.7, forming a 3Mn/1Fe cluster.

Authors:
 [1];  [1];  [2];  [1]
  1. Lomonosov Moscow State Univ., Moscow (Russia)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), NREL Emeritus Program
OSTI Identifier:
1413186
Report Number(s):
NREL/JA-2700-68047
Journal ID: ISSN 1011-1344
Grant/Contract Number:  
AC36-08GO28308
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Photochemistry and Photobiology B: Biology
Additional Journal Information:
Journal Volume: 178; Journal Issue: C; Journal ID: ISSN 1011-1344
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; iron; manganese; calcium; metal cluster; oxygen-evolving complex; water-splitting, photosystem II

Citation Formats

Semin, B. K., Davletshina, L. N., Seibert, M., and Rubin, A. B. Creation of a 3Mn/1Fe cluster in the oxygen-evolving complex of photosystem II and investigation of its functional activity. United States: N. p., 2017. Web. doi:10.1016/j.jphotobiol.2017.11.016.
Semin, B. K., Davletshina, L. N., Seibert, M., & Rubin, A. B. Creation of a 3Mn/1Fe cluster in the oxygen-evolving complex of photosystem II and investigation of its functional activity. United States. doi:10.1016/j.jphotobiol.2017.11.016.
Semin, B. K., Davletshina, L. N., Seibert, M., and Rubin, A. B. Sat . "Creation of a 3Mn/1Fe cluster in the oxygen-evolving complex of photosystem II and investigation of its functional activity". United States. doi:10.1016/j.jphotobiol.2017.11.016. https://www.osti.gov/servlets/purl/1413186.
@article{osti_1413186,
title = {Creation of a 3Mn/1Fe cluster in the oxygen-evolving complex of photosystem II and investigation of its functional activity},
author = {Semin, B. K. and Davletshina, L. N. and Seibert, M. and Rubin, A. B.},
abstractNote = {Extraction of Mn cations from the oxygen-evolving complex (OEC) of Ca-depleted PSII membranes (PSII[-Ca,4Mn]) by reductants like hydroquinone (H2Q) occurs with lower efficiency at acidic pH (2Mn/reaction center [RC] are extracted at pH 5.7) than at neutral pH (3Mn/RC are extracted at pH 6.5) [Semin et al. Photosynth. Res. 125 (2015) 95]. Fe(II) also extracts Mn cations from PSII(-Ca,4Mn), but only 2Mn/RC at pH 6.5, forming a heteronuclear 2Mn/2Fe cluster [Semin and Seibert, J. Bioenerg. Biomembr. 48 (2016) 227]. Here we investigated the efficiency of Mn extraction by Fe(II) at acidic pH and found that Fe(II) cations can extract only 1Mn/RC from PSII(-Ca,4Mn) membranes at pH 5.7, forming a 3Mn/1Fe cluster.},
doi = {10.1016/j.jphotobiol.2017.11.016},
journal = {Journal of Photochemistry and Photobiology B: Biology},
number = C,
volume = 178,
place = {United States},
year = {2017},
month = {11}
}

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