Simultaneous femtosecond X-ray spectroscopy and diffraction of photosystem II at room temperature.

Simultaneous femtosecond X-ray spectroscopy and diffraction of photosystem II at room temperature.
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DOI:
10.1126/science.1234273
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发表时间:
2013-04-26
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Yano J
Yano J
中科院分区:
其他
文献类型:
--
作者:
Kern J;Alonso-Mori R;Tran R;Hattne J;Gildea RJ;Echols N;Glöckner C;Hellmich J;Laksmono H;Sierra RG;Lassalle-Kaiser B;Koroidov S;Lampe A;Han G;Gul S;Difiore D;Milathianaki D;Fry AR;Miahnahri A;Schafer DW;Messerschmidt M;Seibert MM;Koglin JE;Sokaras D;Weng TC;Sellberg J;Latimer MJ;Grosse-Kunstleve RW;Zwart PH;White WE;Glatzel P;Adams PD;Bogan MJ;Williams GJ;Boutet S;Messinger J;Zouni A;Sauter NK;Yachandra VK;Bergmann U;Yano J

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利用直线加速器相干光源(LCLS)产生的强飞秒x射线脉冲,在室温下对光系统II (PS II)微晶进行了x射线衍射(XRD)和x射线发射光谱(XES)分析。该方法对PS II的出氧配合物中Mn4CaO5簇的整体蛋白质结构和电子结构进行了探测。从PS II的暗态(S1)和初亮态(S2)得到了XRD数据。我们同时进行的XRD/XES研究表明,在LCLS测量期间,PS II晶体不仅在PS II的结构方面是完整的,而且在高辐射敏感性Mn4CaO5簇的电子结构方面也是完整的,这为未来的动力学研究开辟了新的方向。
Intense femtosecond X-ray pulses produced at the Linac Coherent Light Source (LCLS) were used for simultaneous X-ray diffraction (XRD) and X-ray emission spectroscopy (XES) of microcrystals of Photosystem II (PS II) at room temperature. This method probes the overall protein structure and the electronic structure of the Mn4CaO5 cluster in the oxygen-evolving complex of PS II. XRD data are presented from both the dark state (S1) and the first illuminated state (S2) of PS II. Our simultaneous XRD/XES study shows that the PS II crystals are intact during our measurements at the LCLS, not only with respect to the structure of PS II, but also with regard to the electronic structure of the highly radiation sensitive Mn4CaO5 cluster, opening new directions for future dynamics studies.
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期刊: Science (New York, N.Y.)
影响因子: --
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