A new approach to the systematics on the energy transfer mechanism of energy transfer in photosynthesis based on the intermediary interaction

基于颜料之间的中间相互作用，研究了光合成天线系统中的能量传递过程和机制，尽管到目前为止已经假设了很弱的相互作用。我们对从光合作用细菌到高等植物的天线系统进行了分析，得到了以下结果：(1)对藻胆蛋白中的藻蓝蛋白进行了简正波分析，研究了色素与多肽之间的相互作用。我们发现发色团的氮原子与多肽的天冬氨酸残基之间存在一种特殊的相互作用，这决定了生色团的电子状态。与这种相互作用相比，色素之间的相互作用能较低，因此不存在中介相互作用。(2)通过对一株蓝藻Acaryoloris marina的研究，了解了含Chl(Chl)d的藻类天线系统的分子结构。在这种藻类的光系统II中，向上的能量转移是生存所必需的。这种独特的转移系统在弱相互作用的情况下有时会受到热能的阻碍，在中间相互作用时会被修改。(3)强相互作用的典型例子是绿色光合细菌Chlorofexus aurantiacus的叶绿体中的色素阵列。几乎所有的颜料都包含在具有强相互作用的主要成分中，但矢量能量流动所必需的次要成分并不包括在上述类别中。(4)PI在教科书中写了两章关于能量传递过程和机制，不是基于弱相互作用，而是基于颜料之间的中介相互作用。

Energy transfer processes and mechanism in the photo synthetic antenna systems were investigated based on the intermediary interaction between pigments, even though a very weak interaction has been assumed so far. We have analyzed antenna system from photosynthetic bacteria to higher plants, and obtained following results.(1) The normal mode analysis was performed on phycocyanin, one of phycobiliproteins, to investigate the interaction between pigments and peptide moieties. We found a specific interaction between nitrogen atoms of chromophores and the aspartic acid residue of peptide that determined the electronic state of chromophores. Compared with this interaction, interaction energy between pigments was lower, thus an intermediary interaction was not the case.(2) A cyanobacterium Acaryochloris marina was investigated to know the molecular architecture of the antenna system of Chlorophyll (Chl) d-containing algae. In photosystem II of this alga, an up-hill energy transfer is requisite for survival. This unique transfer system is sometime hindered by thermal energy in the case of a weak interaction, and is modified when in an intermediary interaction.(3) A typical example of the strong interaction is a pigment array in chlorosomes of a green photosynthetic bacterium Chlorofexus aurantiacus. Almost all pigments are included in the major constituents with a strong interaction, however minor components necessary for the vectorial energy flow were not included in the above category.(4) The PI has written two chapters in the textbook on the energy transfer processes and mechanisms based not on the weak interaction but on the intermediary interaction between pigments.