Native Desorption Electrospray Ionization Liberates Soluble and Membrane Protein Complexes from Surfaces.

Native Desorption Electrospray Ionization Liberates Soluble and Membrane Protein Complexes from Surfaces.
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DOI:
10.1002/anie.201704849
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发表时间:
2017-11-13
期刊:
Angewandte Chemie (International ed. in English)
影响因子:
--
通讯作者:
Robinson CV
Robinson CV
中科院分区:
其他
文献类型:
--
作者:
Ambrose S;Housden NG;Gupta K;Fan J;White P;Yen HY;Marcoux J;Kleanthous C;Hopper JTS;Robinson CV

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质谱(MS)应用于完整的蛋白质复合物通常需要电喷雾(ES)电离,而不是通过直接从表面解吸来实现的。然而,解吸ES电离(DESI) MS通过释放和表征小分子改变了组织表面的研究。出于筛选配体与完整蛋白复合物结合的愿望,我们报告了一个原生DESI平台的开发。通过建立保存非共价相互作用的条件,我们利用表面捕获快速周转的酶-底物复合物,并优化用于膜蛋白研究的洗涤剂。我们展示了脂质和药物与沉积在表面的膜蛋白的结合,以及相关激动剂混合物与GPCR特异性结合的选择性。因此,总的来说,我们介绍了这个原生DESI平台,它具有高通量配体筛选一些最具挑战性的药物靶点(包括gpcr)的潜力。
Mass spectrometry (MS) applications for intact protein complexes typically require electrospray (ES) ionization and have not been achieved via direct desorption from surfaces. Desorption ES ionization (DESI) MS has however transformed the study of tissue surfaces through release and characterisation of small molecules. Motivated by the desire to screen for ligand binding to intact protein complexes we report the development of a native DESI platform. By establishing conditions that preserve non‐covalent interactions we exploit the surface to capture a rapid turnover enzyme–substrate complex and to optimise detergents for membrane protein study. We demonstrate binding of lipids and drugs to membrane proteins deposited on surfaces and selectivity from a mix of related agonists for specific binding to a GPCR. Overall therefore we introduce this native DESI platform with the potential for high‐throughput ligand screening of some of the most challenging drug targets including GPCRs.
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