AI 中文总结
研究蓝藻光系统II核心复合物中色素的网络特征，通过构建基于EET速率的网络，计算相关结构指标，发现网络拓扑能编码功能信息，可推断复合物中叶绿素能量转移概率及反应中心活性分支叶绿素的特性。
AI 中文摘要
光系统II（PSII）的部分激发能量转移（EET）特性源于色素间的相互联系。为理解EET与色素相互作用结构的关联，我们根据与色素（叶绿素和脱镁叶绿素）距离及空间取向相关的EET速率构建网络。从Förster理论出发构建EET途径网络，计算中介中心性、特征向量中心性和加权聚类等网络结构指标。研究发现简化网络的分析能重现一些特性，意味着网络拓扑编码功能相关信息，如可推断色素 - 蛋白复合物CP47中多数叶绿素能量转移概率更高，反应中心的活性分支叶绿素具有高特征向量中心性、高中介中心性和低加权聚类系数等。
英文摘要
Part of the excitation energy transfer (EET) characteristics of the photosystem II (PSII) comes from the interconnection between pigments. To understand the correlation between the EET and the pigments' interaction structure, we construct a network from the EET rates, which are related to both the distance between the pigments (chlorophylls and pheophytins) and their spatial orientations. Especially, we investigate how well the PS II core complex's EET functionality can be explained by using only the network topology in Thermosynechococcus vulcanus 1.9 Å. Starting from the Förster theory, we construct a network of EET pathways. For an analysis of the network structure, we calculate common network-structural measures like betweenness centrality, eigenvector centrality and weighted clustering. These measures can reflect the role of individual pigments in the EET network. In our work, we found that some well-known properties were reproduced by the network analysis of the simplified network, which means that the topology of the network encodes functionally relevant information. For example, from the network structural analysis, we can infer that most of the chlorophyll molecules (chlorophylls) in the pigment-protein complex CP47 have a heightened probability of transferring energy compared with other chlorophylls. We also see that the active branch chlorophylls in the reaction center are characterized by a high eigenvector centrality, a high betweenness centrality, and a low weighted clustering coefficient. This is indicative of functionally important vertices.
Journal refJournal of the Korean Physical Society 63, 2255-2261 (2013)
