Conformational regulation of charge recombination reactions in a photosynthetic bacterial reaction center
Conformational regulation of charge recombination reactions in a photosynthetic bacterial reaction center
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DOI：
10.1038/nsmb948
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发表时间：
2005-07-01
影响因子：
16.8
通讯作者：
Neutze, R
中科院分区：
文献类型：
--
作者：
Katona, G;Snijder, A;Neutze, R
在强光下，球形红细菌的光合反应中心（RC）稳定P-870（+）中心点Q（A）（-）电荷分离状态，从而使光饱和的潜在有害影响最小化。使用X-射线衍射，我们报告的构象变化，发生在细胞质内的域的RC在响应长时间的照明与明亮的光。我们的观察结果表明，在光合作用中的电子转移反应的调节一种新的结构机制。
In bright light the photosynthetic reaction center ( RC) of Rhodobacter sphaeroides stabilizes the P-870(+) center dot Q(A)(-) charge-separated state and thereby minimizes the potentially harmful effects of light saturation. Using X-ray diffraction we report a conformational change that occurs within the cytoplasmic domain of this RC in response to prolonged illumination with bright light. Our observations suggest a novel structural mechanism for the regulation of electron transfer reactions in photosynthesis.