MODEL PROTEIN PRODUCTION FOR TIME-RESOLVED 2D-ELDOR, PDS, AND MQC ESR

这个子项目是许多利用资源的研究子项目之一 由NIH/NCRR资助的中心赠款提供。次级项目的主要支助 而子项目的主要调查员可能是由其他来源提供的， 包括其它NIH来源。 为子项目列出的总成本可能 表示子项目使用的中心基础设施的估计数量， 而不是由NCRR赠款提供给子项目或子项目工作人员的直接资金。 开发方法需要好的模型系统，PDS当然也是如此。长有机双自由基，多自由基，和超分子组装体的DEER的发展。然而，它们很难合成，需要一个好的有机化学家的专业知识，谁应该对这种合作感兴趣。在我们开发DQC方法时，我们不能依赖于此，而是充分利用了距离在10-30 μ m范围内的少数可用双自由基。但是当我们需要更长的距离时，我们不得不去找Gunnar Jeschke获取样本。 然而，我们确实发现，例如DNA双链体或一些蛋白质也可以贡献良好的模型系统，并且相对容易以所需的数量在内部生产。 对于时间分辨2D-ELDOR光谱的项目开发，加上停止流动或连续快速流动，我们需要大量（高达克）的自旋标记模型蛋白质。例如，T4溶菌酶和钙调蛋白是相对小且稳定的蛋白质，其可以用适度的努力以所需的量表达。一般来说，蛋白质和DNA可以为我们提供所有需要的距离和各种自旋构型。此外，它们与我们的研究更相关。

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. Primary support for the subproject and the subproject's principal investigator may have been provided by other sources, including other NIH sources. The Total Cost listed for the subproject likely represents the estimated amount of Center infrastructure utilized by the subproject, not direct funding provided by the NCRR grant to the subproject or subproject staff. Good model systems are needed to develop methods, which is certainly true of PDS. Long organic biradicals, polyradicals, and supramolecular assemblies were instrumental for development of DEER. However they are difficult to synthesize and require expertise of a good organic chemist, who should be interested in such collaborations. In our development of DQC method we could not rely on this but made a good use of few available biradicals with distances in the range of 10-30 ¿. But when we needed a longer distances, we had to reach to Gunnar Jeschke for the sample. However we did find that for example DNA duplexes or some proteins can also contribute good model systems and are relatively easy to produce in house in required quantities. For the project development on time-resolved 2D-ELDOR spectroscopy, coupled with stopped flow or continuous rapid flow, we require large amounts (up to grams) of spin-labeled model proteins. For example T4 Lysozyme and Calmodulin are relatively small and stable proteins that can be expressed in required quantities with a moderate effort. In general proteins and DNA could provide us with all required distances and a variety of spin configurations. Furthermore, they are much more relevant to our research.