期刊
BIOCHEMISTRY
卷 50, 期 29, 页码 6312-6315出版社
AMER CHEMICAL SOC
DOI: 10.1021/bi200685w
关键词
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资金
- Division of Chemical Sciences, Geosciences, and Biosciences, Office of Basic Energy Sciences, U.S. Department of Energy [DE-SC 0001423]
- National Institutes of Health (NIH) [GM84267, GM043278, GM32715]
- Grants-in-Aid for Scientific Research [10J02491] Funding Source: KAKEN
Chloride binding in photosystem II (PSII) is essential for photosynthetic water oxidation. However, the functional roles of chloride and possible binding sites, during oxygen evolution, remain controversial. This paper examines the functions of chloride based on its binding site revealed in the X-ray crystal structure of PSII at 1.9 angstrom resolution. We find that chloride depletion induces formation of a salt bridge between D2-K317 and D1-D61 that could suppress the transfer of protons to the lumen.
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