COBRE: U NEL: CORE B: SPECTROSCOPY

本子项目是利用由NIH/NCRR资助的中心赠款提供的资源的众多研究子项目之一。子项目和研究者（PI）可能已经从另一个NIH来源获得了主要资金，因此可以在其他CRISP条目中表示。列出的机构是中心的，不一定是研究者的机构。为了升级光谱设备，在2003年2月订购并接收了SX.18MV（停止流动反应分析仪）的连续混合升级。此外，还订购了对现有布鲁克300E EPR光谱仪的升级，这将大大增强光谱设备。此外，还在设施中增加了一个VP-ITC微热量计，以进一步加强对生物物理研究的支持。该设备提供结合相互作用的分析，这对氧化还原蛋白的研究很重要，氧化还原蛋白中的大多数首先与它们的伴侣“对接”，进行电子转移，然后解离。微热量计将被氧化还原生物学中心的许多成员和两个机构的其他教职员工广泛用于研究大分子-配体或底物以及大分子-大分子（蛋白质-蛋白质，蛋白质，DNA）相互作用。当探针可用时，这些数据将补充光谱方法获得的动力学和热力学数据，并且在不经历光谱可检测变化的系统中是独一无二的。该设施为本提案中的研究提供服务支持。许多关于氧化还原反应和氧化还原中心之间相互作用的重要信息是通过光谱方法获得的。电子顺磁共振（EPR）谱是测定顺磁氧化还原中心电子结构的关键仪器之一。该信息补充了大分子的紫外可见光谱和荧光光谱。圆二色光谱（CD）用于确定蛋白质的一些宏观性质，例如大分子之间以及大分子与底物或抑制剂之间的总体构象，这些构象决定了反应的速率。

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. In order to upgrade the Spectroscopic Facilities, a sequential mixing upgrade for the SX.18MV, Stopped-flow Reaction Analyser, was ordered and received in February 2003. Additionally, an upgrade for the existing Bruker 300E EPR spectrometer was ordered which will greatly enhance the Spectroscopy Facilities. Additionally, a VP-ITC Microcalorimeter was added to the facilities to further enhance the support for biophysical studies. This equipment presents analysis of binding interactions, which is important for the study of redox proteins, most of which first "dock" with their partner, undergo electron transfer and then dissociate. The microcalorimeter will be used extensively by many members of the Redox Biology Center and other faculty at the two institutions to study macromolecule-ligand or substrate and marcromolecule-macromolecule (protein-protein, protein, DNA) interactions. Such data will complement kinetic and thermodynamic data obtained by spectroscopic methods when probes are available and will be unique in systems that do not undergo spectroscopically detectable changes. This facility provides service support for the research in this proposal. Much of the important information about redox reactions and interactions between redox centers is obtained by spectroscopic methods. Electron paramagnetic resonance (EPR) spectroscopy is one of the key instruments used to determine the electronic structure of paramagnetic redox centers. This information complements UV-visible and fluorescence spectra of the macromolecule. Circular dichroism (CD) spectroscopy is used to determine some macroscopic properties of a protein, such as overall conformation between macromolecules and between a macromolecule and a substrate or inhibitor governs the rate of reactions.