Phototriggered dynamic and biomimetic growth of chlorosomal self-aggregates
Phototriggered dynamic and biomimetic growth of chlorosomal self-aggregates
复制标题
叶绿体自聚集体的光触发动态和仿生生长
DOI：
10.1021/jacs.8b13056
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发表时间：
2019
影响因子：
15
通讯作者：
H. Tamiaki
中科院分区：
文献类型：
--
作者：
S. Matsubara;H. Tamiaki
超分子聚合是近年来发展起来的一种模拟天然体系的聚合方法，它是一步一步地形成自聚集体。然而，从单体物质连续且自发地形成自聚集体的一般系统仍然具有挑战性。在这里，我们报告了一个光诱导的超分子聚合系统作为叶绿素聚集体的仿生形成，叶绿素聚集体是光合绿色细菌中的主要捕光天线，称为“绿小体”。在该系统中，惰性叶绿素衍生物被紫外线照射，通过脱保护逐渐产生活性物种。这些活性单体自发地组装形成纤维状的绿色体自聚集体，其方式与天然绿色体自聚集体的动态生长类似。该研究对于阐明绿色体聚集体的形成过程和构建自然界中的其他超分子结构具有重要意义。
Supramolecular polymerizations mimicking native systems, which are step-by-step constructions to form self-aggregates, were recently developed. However, a general system to successively and spontaneously form self-aggregates from monomeric species remains challenging. Here, we report a photoinduced supramolecular polymerization system as a biomimetic formation of chlorophyll aggregates which are the main light-harvesting antennas in photosynthetic green bacteria, called “chlorosomes”. In this system, inert chlorophyll derivatives were UV-irradiated to gradually produce active species through deprotection. Such active monomers spontaneously assembled to form fiberlike chlorosomal self-aggregates in a similar manner as a dynamic growth of natural chlorosomal self-aggregates. The study would be useful for elucidation of the formation process of the chlorosomal aggregates and construction of other supramolecular structures in nature.