High Resolution MALDI-TOF Mass Spectrometer

描述（由申请方提供）：肽和小分子的高效MALDI-TOF MS总结。该项目将建立在MALDI-TOF质谱的最新进展的基础上，开发新的仪器和软件，提供与FTICR和Orbitrap仪器上的电喷雾电离竞争的分辨率和质量准确度，但速度，吞吐量，灵敏度和动态范围的数量级大于任何电喷雾系统。在初步工作中，已经开发了一种原型仪器，其在选定的质量下提供大于30，000的分辨能力，并且在已知蛋白质质谱仪的宽质量范围内提供ppm质量精度。基于初步结果和理论计算，预期小型廉价台式仪器的最终分辨率至少为100，000，使用自动内部校准，无需操作员干预，灵敏度可在1阿摩尔水平检测和准确测定质量，大幅面MALDI板上所有斑点的RMS质量准确度均优于1 ppm。该项目的长期目标是提供实用的商业仪器，使高性能MALDI-TOF质谱仪的全部功能常规地用于目前可用的工具不能令人满意地服务的困难的生物应用。这项工作将包括TOF MS的技术进步，并将重点关注特定应用的需求，以及开发满足这些需求的可靠和具有成本效益的方法。 公共卫生相关性：该仪器是基于MALDI的新集成分析系统的重要组成部分，将使大规模蛋白质组学和代谢组学实用化。人类基因组计划的完成和分析复杂生物样品中蛋白质和小分子的改进方法已经被广泛预测在不久的将来会极大地改变药物发现和医学临床实践，但这尚未实现。目前的技术显然无法完成这项任务。

DESCRIPTION (provided by applicant): High-performance MALDI-TOF MS for Peptides and Small Molecules Summary. This project will build on recent advances in MALDI-TOF mass spectrometry to develop new instruments and software that provide resolving power and mass accuracy competitive with electrospray ionization on FTICR and Orbitrap instruments, but with speed, throughput, sensitivity and dynamic range orders of magnitude greater than are possible with any electrospray system. In preliminary work a prototype instrument has been developed that provides greater than 30,000 resolving power at a selected mass, and ppm mass accuracy over a broad mass range on known protein digests. Based on preliminary results and theoretical calculations the ultimate resolving power is expected to be at least 100,000 in a small, inexpensive benchtop instrument with better than 1ppm RMS mass accuracy for all spots on a large format MALDI plate using automated internal calibration with no operator intervention and sensitivity to detect and accurately determine masses at the 1 attomole level. The long-range goal of this project is to provide practical commercial instruments that make the full power of high-performance MALDI-TOF mass spectrometry routinely available for difficult biological applications that are not satisfactorily served by the tools presently available. This effort will include technical advances in TOF MS and will also focus on the needs of specific applications and on developing reliable and cost-effective means for satisfying these needs. PUBLIC HEALTH RELEVANCE: The proposed instrument is a vital component of new integrated analytical systems based on MALDI that will make large-scale proteomics and metabolomics practical. Completion of the human genome project and improved methods for analyzing proteins and small molecules in complex biological samples have been widely predicted to dramatically change drug discovery and clinical practice of medicine in the near future, but this has not yet been realized. Current technology is clearly not up to the task.