通过电子晶体学确定的植物光捕获复合体的三维结构。

Three-dimensional structure of plant light-harvesting complex determined by electron crystallography.

作者信息

Kühlbrandt W, Wang D N

机构信息

European Molecular Biology Laboratory, Heidelberg, Germany.

出版信息

Nature. 1991 Mar 14;350(6314):130-4. doi: 10.1038/350130a0.

DOI:10.1038/350130a0

PMID:2005962

Abstract

The structure of the light-harvesting chlorophyll a/b-protein complex, a membrane protein serving as the major antenna of solar energy in plant photosynthesis, has been determined at 6 A resolution by electron crystallography. Within the complex, three membrane-spanning alpha helices and 15 chlorophyll molecules are resolved. There is an intramolecular diad relating two of the alpha helices and some of the chlorophylls. The spacing of the chlorophylls suggests energy transfer by delocalized exciton coupling and Förster mechanisms.

摘要

捕光叶绿素a/b蛋白复合体是植物光合作用中太阳能的主要天线膜蛋白，其结构已通过电子晶体学在6埃分辨率下确定。在该复合体内，分辨出了三个跨膜α螺旋和15个叶绿素分子。存在一个分子内二轴对称关系，涉及其中两个α螺旋和一些叶绿素。叶绿素的间距表明通过离域激子耦合和福斯特机制进行能量转移。