PROPERTIES OF SINGLE ASSEMBLIES OF LIGHT HARVESTER LH2

Light Harvester LH2 单个组件的特性

• 批准号: 7373133
• 负责人: R COGDELL
• 金额: $ 1.69万
• 依托单位: UNIVERSITY OF PENNSYLVANIA
• 依托单位国家: 美国
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-08-01 至 2007-07-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7373133
• 关键词: PROPERTIES; SINGLE; ASSEMBLIES; LIGHT; HARVESTER

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. We are examining the photobleaching and transfer dynamics in single assemblies of the LH2 complexes and the up-dipeptides that can be reversibly extracted from them. Each LH2 contains eighteen bacteriochlorophylls (B850) and nine collectors (B800). The fluorescence lifetimes, polarization, correlation times and bleaching kinetics are being studied under a variety of conditions. The primary goals include measurements of long time scale protein dynamics. Previous polarization experiments have revealed conformational dynamics associated with excitonic migration in the monomeric LH2 assembly. Furthermore, blue emission originating from higher excited states was recently detected and investigated.

该子项目是利用NIH/NCRR资助的中心赠款提供的资源的许多研究子项目之一。子项目和研究者（PI）可能从另一个NIH来源获得主要资金，因此可以在其他CRISP条目中表示。所列机构为中心，不一定是研究者所在机构。我们正在研究的光漂白和转移动力学在单个组装的LH 2复合物和上二肽，可以从他们可逆地提取。每个LH 2含有18个细菌叶绿素（B850）和9个收集器（B800）。荧光寿命，偏振，相关时间和漂白动力学正在研究在各种条件下。主要目标包括测量长时间尺度的蛋白质动力学。以前的极化实验已经揭示了与激子迁移在单体LH 2组装的构象动力学。此外，最近检测和研究了源自较高激发态的蓝光发射。