IRON-SULFUR PROTEIN ASSEMBLY

这个子项目是许多研究子项目中利用 资源由NIH/NCRR资助的中心拨款提供。子项目和 调查员(PI)可能从NIH的另一个来源获得了主要资金， 并因此可以在其他清晰的条目中表示。列出的机构是 该中心不一定是调查人员的机构。 铁-硫团簇([Fe-S])是存在于各种生物体中的简单无机基团。含有[Fe-S]簇的蛋白质具有多种独特的功能：电子传递、基因调控、环境感知和底物激活。特别是，在几个[Fe-S]簇组装和转移蛋白系统中，IscU是一个非常吸引人的蛋白质系统，因为它具有独特的生物学功能和灵活的特性。到目前为止，人们认为IscU组装了[2Fe-2S]簇并将其转移到铁氧还蛋白。然而，簇组装和转移所涉及的实际机制以前并没有在分子水平上描述。因此，通过对ISCU的核磁共振波谱研究，我们期望能够确定ISCU的结构动力学，这也可能解释ISCU的分子机制。此外，我们还试图分析HALO-ISCU的顺磁信号，研究配位[Fe-S]团簇的特征模式。这可能解释ISCU与[Fe-S]团簇相互作用的许多未知性质。

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. Iron-sulfur ([Fe-S]) clusters are simple inorganic groups found in various organisms. The proteins holding the [Fe-S] clusters can have various unique functions: electron transfer, gene regulation, environmental sensing, and substrate activation. In particular, among several [Fe-S] cluster assembly and transfer protein systems, IscU is a very fascinating protein because of its unique biological functions and flexible characteristics. To date, it is believed that IscU assembles the [2Fe-2S] cluster and transfers it to ferredoxins. However, the actual mechanisms involved in the cluster assembly and transfer have not been described previously in the molecular level. Therefore, by investigating IscU with the nuclear magnetic resonance (NMR) spectroscopy, we are expecting that the structural dynamics of IscU can be determined, which may explain the molecular mechanisms of IscU as well. In addition, we are trying to analyze the paramagnetic signals of holo-IscU and to investigate the characteristic pattern of coordinating the [Fe-S] cluster. This may elucidate many unknown properties of the interaction between IscU and the [Fe-S] cluster.