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在计算机设计的合成金属蛋白中模仿光合作用
Lidia Cristian1, Piotr Piotrowiak, Ramy S Farid
1Department of Chemistry, Rutgers, The State University of New Jersey, 73 Warren Street, Newark, New Jersey 07102, USA.
Journal of the American Chemical Society
|September 25, 2003
概括
研究人员设计了一种功能性人工反应中心 (RC) 蛋白质,模仿自然光合作用. 这种基于蛋白质的太阳能转换系统可实现高效的电荷分离,为新能源技术铺平道路.
科学领域:
- 生物物理化学 生物物理化学
- 蛋白质工程是指蛋白质工程.
- 可再生能源可再生能源是可再生能源.
背景情况:
- 蛋白质设计的进步使得能够构建与原生蛋白质类似的蛋白质架构.
- 功能性,基于蛋白质的太阳能转换系统仍然难以捉摸.
- 自然的光合作用反应中心 (RCs) 有效地转化光能.
研究的目的:
- 设计和描述一个功能性的人工反应中心 (RC) 蛋白质.
- 使用合成蛋白质模仿自然光合作用RCs的基本功能.
- 创建一个基于蛋白质的太阳能转换系统.
主要方法:
- 利用CORE蛋白质设计程序设计了一种合成金属蛋白 (aRC).
- 结合了两个双胺结合的金属共因子:一个 (Ru) 复合体和一个基团.
- 描述了光刺激和电子转移 (ET) 动态.
主要成果:
- 设计的aRC蛋白质促进了与外源接受者/捐赠者的多个减少/氧化循环.
- 光刺激诱导了从Ru(II) 到heme组的快速ET,形成长寿命的电荷分离状态 (CSS) (Ru(III) /Fe(II)) ,寿命为70 ns.
- 长寿的CSS参与了随后的ET反应,模仿了本地RCs.
结论:
- 展示了基于蛋白质的功能性人工反应中心的成功设计和建造.
- 集成自动化计算蛋白质设计与生物电子道原理.
- 建立了功能性基于蛋白质的人工反应中心的第一个例子,用于太阳能转换.
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