S1-state model of the O2-evolving complex of photosystem II.
S1-state model of the O2-evolving complex of photosystem II.
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DOI:
10.1021/bi200681q
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发表时间:
2011-07-26
期刊:
影响因子:
2.9
通讯作者:
Batista, Victor S.
中科院分区:
文献类型:
--
作者:
Luber, Sandra;Rivalta, Ivan;Umena, Yasufumi;Kawakami, Keisuke;Shen, Jian-Ren;Kamiya, Nobuo;Brudvig, Gary W.;Batista, Victor S.
We introduce a Quantum Mechanics/Molecular Mechanics model of the oxygen-evolving complex (OEC) of photosystem II in the S1 Mn4(IV, III, IV, III) state, where Ca2+ is bridged to manganese centers by the carboxylate moieties of D170 and A344 based on the new X-ray diffraction (XRD) model recently reported at 1.9 Å resolution. The model is also consistent with high-resolution spectroscopic data, including polarized extended X-ray absorption fine structure data of oriented single crystals. Our results provide refined intermetallic distances within the Mn cluster and suggest that the XRD model most likely corresponds to a mixture of oxidation states, including more reduced species than observed in the catalytic cycle of water splitting.
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影响因子:
15
作者:
Sproviero, Eduardo M.;Gascon, Jose A.;Batista, Victor S.
通讯作者:
Batista, Victor S.
DOI:
10.1073/pnas.92.8.3209
发表时间:
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影响因子:
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