Coordination Funds

协调基金

• 批准号: 524931683
• 负责人: Professor Dr. Michael Hippler
• 金额: --
• 依托单位: Arbeitsgruppe Plant Biochemistry and Biotechnology
• 依托单位国家: 德国
• 项目类别: Research Units
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/524931683?language=en
• 关键词: Coordination; Funds

The proton motive force (PMF) is at the heart of energy metabolism and fuels most cellular functions. It is universal as the genetic code and has been shaping evolution. The PMF is an electrochemical gradient across a membrane, usually generated by the concerted activity of multiple membrane protein complexes. It separates energy transformation from molecular identities and stochiometric constraints and freely connects and integrates otherwise unrelated cellular processes. This feature has been key for the success of the PMF. While being particularly flexible, the PMF must also be strictly reliable to fuel biochemical reactions and to maintain the cell. To guarantee energy supply, environmental and physiological stimuli must be integrated into PMF regulation. Even though the PMF has been studied intensely, regulatory strategies remain insufficiently understood. Recently, functional imaging and biosensing techniques have uncovered novel, fundamental features of the mitochondrial PMF. While those insights have started to shift the paradigms of our understanding of bioenergetic dynamics, similar insights are lacking for oxygenic photosynthesis. Yet, studying PMF in the context of photosynthesis is particularly well suited as an approach to understand the principles underpinning PMF dynamics, because it is particularly prone to rapid external changes due to fluctuating light in natural habitats. This Research Group (GoPMF) will develop concepts of how the generation and modulation of the PMF is regulated to optimize photosynthetic output in changeable natural environments. Driven by recent discoveries and enabling methodological developments by members of this initiative, we will assess photosynthetic bioenergetics within its context of subcellular organization and physiology. We will make use of cyanobacteria and chloroplasts as in vivo models to dissect mechanisms of rapid PMF adjustment at the posttranslational and physiological level. These insights will be linked with mechanistic and structural analyses of the molecular machines that generate and modulate the PMF. Combining state-of-the-art imaging techniques, with the development of in situ biosensing techniques to monitor bioenergetic characteristics of the PMF live in individual cells, organelles and thylakoids will take our understanding of PMF management into a novel cell biological context. Mechanistic molecular detail into the mechanisms driving PMF dynamics will be gained through fast time-resolved spectroscopy, mass spectrometry and structural biology including cryo-EM and cryo-ET. Extensive genetic engineering will take advantage of the mechanistic conservation and diversity in PMF regulation by cyanobacteria, algae and plants. These functional studies will be flanked by mathematical modeling of the PMF. We expect to establish an understanding of the PMF as a dynamic, responsive and integrated hub that shapes photosynthesis and its adjustment to rapid external changes.

质子动力（PMF）是能量代谢的核心，为大多数细胞功能提供燃料。它作为遗传密码是普遍存在的，并一直在塑造进化。PMF是跨膜的电化学梯度，通常由多个膜蛋白复合物的协同活性产生。它将能量转换与分子身份和化学计量学约束分开，并自由地连接和整合其他无关的细胞过程。这一特性是PMF成功的关键。虽然PMF特别灵活，但它也必须严格可靠地为生化反应提供燃料并维护电池。为了保证能量供应，必须将环境和生理刺激整合到PMF调节中。尽管对PMF进行了深入的研究，但对监管策略的理解仍然不够。最近，功能成像和生物传感技术已经发现了新的，线粒体PMF的基本特征。虽然这些见解已经开始改变我们对生物能量动力学的理解范式，但对产氧光合作用缺乏类似的见解。然而，在光合作用的背景下研究PMF特别适合作为理解PMF动力学原理的一种方法，因为它特别容易因自然栖息地的光照波动而发生快速的外部变化。该研究小组（GoPMF）将开发PMF的产生和调节如何在多变的自然环境中优化光合输出的概念。最近的发现和使该倡议的成员的方法发展的驱动下，我们将评估光合生物能量学的亚细胞组织和生理学的背景下。我们将利用蓝藻和叶绿体作为体内模型，在翻译后和生理水平上剖析PMF快速调节的机制。这些见解将与产生和调节PMF的分子机器的机制和结构分析联系起来。结合国家的最先进的成像技术，在原位生物传感技术的发展，以监测生物能量特性的PMF活在单个细胞，细胞器和类囊体将把我们的理解PMF管理到一个新的细胞生物学背景。驱动PMF动力学机制的机制分子细节将通过快速时间分辨光谱学、质谱学和结构生物学（包括cryo-EM和cryo-ET）获得。广泛的基因工程将利用蓝藻、藻类和植物在PMF调节中的机制保守性和多样性。这些功能研究将通过PMF的数学建模进行。我们希望建立一个了解PMF作为一个动态的，反应灵敏的和综合的枢纽，塑造光合作用和它的调整，以快速的外部变化。