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Specific molecular aggregation of photosynthetic pigment-protein complex LHCII

机译:光合色素蛋白络合物LHCII的特定分子聚集

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LHCII is a largest plant photosynthetic antenna complex. Examination of monomolecular layers of LHCII. with Atomic Force Microscopy reveals formation of regular ring-like structures composed of six trimers of the complex. FTIR analysis of aggregated LHCII suggests that regular supramolecular structures of the complex are stabilized by hydrogen bonding between the α helices C of neighboring trimers. Analysis of fluorescence emission spectra of LHCII-bound chlorophyll a reveals that the aggregation is associated with formation of new electronic energy levels that can be particularly important for both photosynthetic excitation energy transfer and quenching of excessive excitations under overexcitation conditions.
机译:LHCII是一个最大的植物光合天线综合体。检测LHCII的单分子层。原子力显微镜显微镜揭示了由六个三聚体组成的常规环状结构的形成。聚集的LHCII的FTIR分析表明,通过相邻三聚体的α螺旋C之间的氢键键合来稳定络合物的常规超分子结构。 LHCII-结合叶绿素A的荧光发射光谱的分析表明,聚集与新的电子能级的形成相关,这对于在过度筛条件下的光合激发能量转移和淬火的光合作用能量转移和淬火尤为重要。

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