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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Watching the photosynthetic apparatus in native membranes.
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Watching the photosynthetic apparatus in native membranes.

机译：观看天然膜中的光合作用。

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摘要

Over the last 9 years, the structures of the various components of the bacterial photosynthetic apparatus or their homologues have been determined by x-ray crystallography to at least 4.8-A resolution. Despite this wealth of structural information on the individual proteins, there remains an urgent need to examine the architecture of the photosynthetic apparatus in intact photosynthetic membranes. Information on the arrangement of the different complexes in a native system will help us to understand the processes that ensure the remarkably high quantum efficiency of the system. In this work we report images obtained with an atomic force microscope of native photosynthetic membranes from the bacterium Rhodospirillum photometricum. Several proteins can be seen and identified at molecular resolution, allowing the analysis and modeling of the lateral organization of multiple components of the photosynthetic apparatus within a native membrane. Analysis of the distribution of the complexes shows that their arrangement is far from random, with significant clustering both of antenna complexes and core complexes. The functional significance of the observed distribution is discussed.
机译：在过去的9年中，已经通过X射线晶体学确定了至少4.8-A分辨率的细菌光合装置各个组成部分的结构或其同系物。尽管有大量关于单个蛋白质的结构信息，但仍然迫切需要检查完整光合膜中光合装置的结构。有关本机系统中不同配合物的排列的信息将帮助我们理解确保系统显着高量子效率的过程。在这项工作中，我们报告了用原子力显微镜从光合红细菌螺旋藻获得的天然光合膜获得的图像。可以在分子分辨率下看到和鉴定出几种蛋白质，从而可以对天然膜内光合作用装置的多个组件的横向组织进行分析和建模。对复合物分布的分析表明，它们的排列远非随机，天线复合物和核心复合物都具有明显的聚类。讨论了观察到的分布的功能意义。

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