CEA, CNRS, Univ. Grenoble Alpes, Institut de Biologie Structurale, 71, avenue des martyrs, 38044, Grenoble, France.
Membrane Biochemistry and Biophysics, Bijvoet Center for Biomolecular Research, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands.
Angew Chem Int Ed Engl. 2017 Feb 20;56(9):2508-2512. doi: 10.1002/anie.201610441. Epub 2017 Jan 27.
The structure, dynamics, and function of membrane proteins are intimately linked to the properties of the membrane environment in which the proteins are embedded. For structural and biophysical characterization, membrane proteins generally need to be extracted from the membrane and reconstituted in a suitable membrane-mimicking environment. Ensuring functional and structural integrity in these environments is often a major concern. The styrene/maleic acid co-polymer has recently been shown to be able to extract lipid/membrane protein patches directly from native membranes to form nanosize discoidal proteolipid particles, also referred to as native nanodiscs. In this work, we show that high-resolution solid-state NMR spectra can be obtained from an integral membrane protein in native nanodiscs, as exemplified by the 2×34 kDa bacterial cation diffusion facilitator CzcD.
膜蛋白的结构、动态和功能与其所处的膜环境的特性密切相关。为了进行结构和生物物理特性的表征,通常需要将膜蛋白从膜中提取出来,并在合适的模拟膜环境中进行重建。确保这些环境中的功能和结构完整性通常是一个主要关注点。最近已经证明,苯乙烯/马来酸共聚物能够直接从天然膜中提取脂质/膜蛋白斑块,形成纳米尺寸的盘状脂蛋白颗粒,也称为天然纳米盘。在这项工作中,我们证明了可以从天然纳米盘中的整合膜蛋白中获得高分辨率固态 NMR 谱,以 2×34 kDa 的细菌阳离子扩散促进剂 CzcD 为例。