Purchase of a 600 MHz NMR Console and Probes

购买 600 MHz NMR 控制台和探头

• 批准号: 8051342
• 负责人: JAMES T. STIVERS
• 金额: $ 55万
• 依托单位: JOHNS HOPKINS UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-08-01 至 2012-07-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8051342
• 关键词: 18 year old; Area; Arts; Basic Science; Biological; Carcinogenesis Mechanism; Chemicals; Complex; DNA; DNA repair protein; DNA-Protein Interaction; Data; Degradation Pathway; Faculty; Failure; Funding; Health; Heteronuclear NMR; Investigation; Life; Methods; Minor; Molecular; Nucleic Acids; Protein-Folding Disease; Proteins; Protons; Research; Research Personnel; Research Project Grants; Resolution; Sampling; Schools; Science; Signal Transduction; Solubility; Structure; System; Technology; Time; United States National Institutes of Health; Universities; base; cryogenics; data acquisition; fundamental research; instrument; instrumentation; macromolecule; medical schools; programs; protein degradation

DESCRIPTION (provided by applicant): An NMR major users group consisting of 5 NIH-funded investigators and 9 minor users with NIH or NSF funding is applying for funds for the purchase of a Bruker or Varian 600 MHz NMR spectrometer console equipped with a triple resonance cryogenic probe. The requested console will replace, at Johns Hopkins School of Medicine (SOM) NMR facility, an 18 year old console which recently suffered a catastrophic failure and has been decommissioned. There is currently no operational high-field spectrometer at the SOM, and the research programs of the user base have been significantly impaired. Although the users have access to other spectrometers located at the Arts and Science campus, these machines are now constantly utilized with significant waiting times for data acquisition that are now slowing down research investigations. The users are located across six Departments and three Schools of the Johns Hopkins University (JHU) and the requested instrument will be used to advance fundamental research into the structure, mechanism and dynamics of biological macromolecules using multi-dimensional heteronuclear NMR methods. This instrumentation will impact a wide range of health related basic research projects in the areas of DNA repair, protein-DNA interactions, protein stability, molecular mechanisms of carcinogenesis, protein folding diseases, protein degradation pathways and signal transduction mechanisms. This acquisition will restore the NMR facility at Hopkins School of Medicine to a state-of-the-art level, and will allow these research programs to take advantage of magnet and probe technologies that are essential for studying large biological molecules under dilute conditions. The new system will provide the chemical shift dispersion and sensitivity that is essential for studying denatured states of proteins, aliphatic proton regions of nucleic acids, and obtaining spectral resolution of native 20-40 kDa proteins and large protein-DNA complexes that are now under study. In addition, NMR data will be acquired with sensitivity that will be at least 1.7-fold greater than the current 600 MHz instrument, enhancing the study of biological molecules that are challenging due to inherent weakness of the NMR signals, low solubility, low sample availability, or short-lived stability. This acquisition will rescue oversubscription of the Hopkins NMR facilities on both campuses arising from two recent NMR faculty recruitments and also several new research projects that extensively utilize the instruments at the facility. PUBLIC HEALTH RELEVANCE: Funds are requested to obtain a replacement 600 MHz NMR spectrometer console and cryoprobe system that will be used for health related structural and mechanistic research in the areas of enzymatic DNA repair, protein-nucleic acid interactions, molecular mechanisms of carcinogenesis, protein folding diseases, protein degradation pathways and signal transduction mechanisms.

描述（由申请人提供）：一个由5名NIH资助的研究人员和9名NIH或NSF资助的次要用户组成的核磁共振主要用户组正在申请购买配备三重共振低温探头的布鲁克或瓦里安600 MHz核磁共振光谱仪控制台的资金。请求的控制台将取代约翰霍普金斯医学院（SOM）核磁共振设施的一台18岁的控制台，该控制台最近遭遇灾难性故障并已退役。目前，SOM没有可操作的高场光谱仪，用户群的研究计划已经严重受损。虽然用户可以访问位于艺术和科学校区的其他光谱仪，但这些机器现在不断使用，数据采集的等待时间很长，现在正在减缓研究调查。用户分布在约翰霍普金斯大学（JHU）的六个系和三个学院，所要求的仪器将用于利用多维异核磁共振方法推进生物大分子结构、机制和动力学的基础研究。该仪器将在DNA修复、蛋白质-DNA相互作用、蛋白质稳定性、致癌分子机制、蛋白质折叠疾病、蛋白质降解途径和信号转导机制等领域影响广泛的健康相关基础研究项目。此次收购将使霍普金斯医学院的核磁共振设备恢复到最先进的水平，并将使这些研究项目能够利用磁铁和探针技术，这些技术对于在稀释条件下研究大型生物分子是必不可少的。新系统将提供化学位移分散和灵敏度，这对于研究蛋白质的变性状态，核酸的脂肪族质子区域，以及获得目前正在研究的天然20-40 kDa蛋白质和大型蛋白质- dna复合物的光谱分辨率至关重要。此外，获得核磁共振数据的灵敏度将至少比目前的600 MHz仪器高1.7倍，从而增强了由于核磁共振信号固有的弱点、低溶解度、低样品可用性或短寿命稳定性而具有挑战性的生物分子的研究。此次收购将挽救两个校区的霍普金斯核磁共振设施的超额认购，这些设施是由最近的两个核磁共振教员招聘和几个新的研究项目引起的，这些项目广泛利用了该设施的仪器。