Coupling of Antennas to Reaction Centers
Coupling of Antennas to Reaction Centers
复制标题
天线与反应中心的耦合
DOI：
10.1007/0-306-47954-0_19
复制
发表时间：
1995
影响因子：
15
通讯作者：
A. Freiberg
中科院分区：
文献类型：
--
作者：
A. Freiberg
近年来已经消除了一个旧的幻想，所有需要一个完整的图片的光合激发，转移和捕获动力学是详细的结构信息系统。这似乎只是一个先决条件。本章着重讨论了有关集光天线与反应中心的耦合问题。结构，动力学以及功能方面的耦合被认为是。由于触角-反应中心耦合在很大程度上取决于特定的蛋白质介质，色素与其蛋白质环境的相互作用和这些蛋白质的弹性性质，采用高静水压力技术进行了研究。从天线到反应中心的激励传递在几十皮秒内发生。反应中心是一个相当完美的陷阱。在光合作用的条件下，只有大约四分之一的能量进入反应中心被转移回天线。得出的结论是，未来的进展，预计在该领域的色素蛋白质复合物的动力学性质的更详细的研究。
Recent years have nullified an old illusion that all that is needed for a complete picture of photosynthetic excitation transfer and trapping dynamics is detailed structural information about the system. This still seems to be only a prerequisite. The present chapter highlights the problems concerning the coupling of lightharvesting antennas to reaction centers. Structural, kinetic as well as functional aspects of the coupling are considered. As the antenna-reaction center coupling is largely governed by the specific protein medium, interactions of pigments with their protein surroundings and the elastic properties of these proteins are studied by employing high hydrostatic pressure technique. Excitation transfer from the antenna to the reaction center takes place in tens of picoseconds. The reaction center is a rather perfect trap. In conditions of photosynthesis, only about a quarter of the energy entering the reaction center is transferred back to the antenna. A conclusion is made that future progress in the field is expected by a more detailed study of the dynamical properties of pigment-protein complexes.