An integrated native mass spectrometry and top-down proteomics method that connects sequence to structure and function of macromolecular complexes.

An integrated native mass spectrometry and top-down proteomics method that connects sequence to structure and function of macromolecular complexes.
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一种集成的天然质谱和自上而下的蛋白质组学方法,该方法将序列连接到大分子复合物的结构和功能。

DOI:
10.1038/nchem.2908
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发表时间:
2018-03
期刊:
影响因子:
21.8
通讯作者:
Loo JA
Loo JA
中科院分区:
化学1区
文献类型:
--
作者:
Li H;Nguyen HH;Ogorzalek Loo RR;Campuzano IDG;Loo JA

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质谱(MS)已成为分析蛋白质复合物的关键技术。天然MS传统上检查蛋白质亚基排列,而蛋白质组学MS则专注于序列鉴定。这两种技术通常是单独执行的,没有收获它们之间的协同作用。在这里,我们描述了一个集成的本地MS和自上而下的蛋白质组学方法,使用傅里叶变换离子回旋共振(FTICR)分析大分子蛋白质复合物在一个单一的实验的发展。我们解决了以前的问题,采用FTICR MS测量大分子复合物,证明检测复合物高达1.8 MDa,我们证明了这种技术的有效性,直接获得序列的高阶结构信息与几个大的复合物。然后,我们总结了不同的激活/解离技术的独特功能。该平台扩展了MS整合蛋白质组学和结构生物学的能力,以提供对蛋白质结构,功能和调控的见解。
Mass spectrometry (MS) has become a crucial technique for the analysis of protein complexes. Native MS has traditionally examined protein subunit arrangements, while proteomics MS has focused on sequence identification. These two techniques are usually performed separately without harvesting the synergies between them. Here we describe the development of an integrated native MS and top-down proteomics method using Fourier transform ion cyclotron resonance (FTICR) to analyze macromolecular protein complexes in a single experiment. We address previous concerns of employing FTICR MS to measure large macromolecular complexes by demonstrating the detection of complexes up to 1.8 MDa, and we demonstrate the efficacy of this technique for direct acquirement of sequence to higher order structural information with several large complexes. We then summarize the unique functionalities of different activation/dissociation techniques. The platform expands the ability of MS to integrate proteomics and structural biology to provide insights into protein structure, function and regulation.
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