POLARIZED XRAY ABSORPTION SPECTROSCOPY OF ORIENTED PHOTOSYSTEM II MEMBRANES

定向光系统 II 膜的偏振 X 射线吸收光谱

• 批准号: 6658642
• 负责人: MELVIN P KLEIN
• 金额: $ 14.32万
• 依托单位: STANFORD UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-03-01 至 2003-02-28
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6658642
• 关键词: biomaterials; biomedical resource; plants; proteins; spectrometry; structural biology

In their photosynthetic membranes, green plants and cyanobacteria contain a crucial enzyme, the oxygen-evolving complex, which catalyzes the oxidation of water to dioxygen. This proposal seeks to apply this technique of polarized XAS to probe the co-factors involved with Mn and the intermediate S states involved in oxygen evolution. Our goal in these near-edge studies is to progress from understanding the origins of Mn edge features in simple molecules to more complicated systems, including ultimately the four-Mn cluster of the OEC.

在它们的光合膜、绿色植物和蓝细菌中 含有一种重要的酶，即放氧复合物，它可以催化 水氧化成双氧。 本提案旨在应用此 偏振 XAS 技术探测与 Mn 相关的辅助因子 以及参与析氧的中间S态。 我们的目标 在这些近边缘研究中，我们要从理解 简单分子中 Mn 边缘特征的起源到更复杂的 系统，最终包括 OEC 的四锰簇。