叶绿体和细菌叶绿素c聚集体之间结构类比的飞秒探测
Femtosecond probe of structural analogies between chlorosomes and bacteriochlorophyll c aggregates.
作者信息
Savikhin S, van Noort P I, Blankenship R E, Struve W S
机构信息
Ames Laboratory, U.S. Department of Energy, Iowa, USA.
出版信息
Biophys J. 1995 Sep;69(3):1100-4. doi: 10.1016/S0006-3495(95)79983-0.
Abstract
Bacteriochlorophyll c pigments extracted from light harvesting chlorosomes in green photosynthetic bacteria are known to self-assemble into aggregates whose electronic spectroscopy resembles that of intact chlorosomes. Femtosecond optical experiments reveal that the chlorosomes and their reconstituted aggregates exhibit closely analogous internal energy transfer kinetics and exciton state evolution. These comparisons furnish compelling new evidence that proteins do not exert a major local role in the BChl c antenna pigment organization of intact chlorosomes.
摘要
从绿色光合细菌中光捕获叶绿体提取的细菌叶绿素c色素已知会自组装成聚集体，其电子光谱类似于完整叶绿体的电子光谱。飞秒光学实验表明，叶绿体及其重构聚集体表现出极为相似的内部能量转移动力学和激子态演化。这些比较提供了令人信服的新证据，表明蛋白质在完整叶绿体的细菌叶绿素c天线色素组织中并不发挥主要的局部作用。
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