Atomic force microscopy detects changes in the interaction forces between GroEL and substrate proteins.

Atomic force microscopy detects changes in the interaction forces between GroEL and substrate proteins.
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原子力显微镜检测 GroEL 和底物蛋白之间相互作用力的变化。

DOI:
10.1016/s0006-3495(98)78032-4
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发表时间:
1998
影响因子:
3.4
通讯作者:
Giorgio Semenza
Giorgio Semenza
中科院分区:
生物学3区
文献类型:
--
作者:
Anja Vinckier;Anja Vinckier;P. Gervasoni;F. Zaugg;Urs Ziegler;Peter Lindner;P. Groscurth;A. Plückthun;Giorgio Semenza;Giorgio Semenza

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已经通过液体下的轻敲模式原子力显微镜(AFM)研究了大肠杆菌GroEL的结构。可以获得高分辨率图像,显示 GroEL 吸附在云母上的垂直位置,底物结合位点位于顶部。由于这种方向,GroEL 与两种底物蛋白(来自酿酒酵母的具有不稳定 Gly→Ala 突变的柠檬酸合酶和来自大肠杆菌的具有两个 Cys→Ala 突变的 RTEMβ-内酰胺酶)之间的相互作用,可以通过力谱在不同条件下进行研究。结果表明,存在 ATP(但不存在 ATPγS)时,相互作用力会减小,并且类天然蛋白的相互作用力小于完全变性的蛋白。它还表明与 GroEL 的相互作用能随着分子量的增加而增加。通过测量伴侣蛋白和两种不同底物蛋白之间相互作用力的变化,我们可以特异性检测核苷酸结合时的 GroEL 构象变化。
The structure of theEscherichia colichaperonin GroEL has been investigated by tapping-mode atomic force microscopy (AFM) under liquid. High-resolution images can be obtained, which show the up-right position of GroEL adsorbed on mica with the substrate-binding site on top. Because of this orientation, the interaction between GroEL and two substrate proteins, citrate synthase fromSaccharomyces cerevisiaewith a destabilizing Gly→Ala mutation and RTEMβ-lactamase fromEscherichia coliwith two Cys→Ala mutations, could be studied by force spectroscopy under different conditions. The results show that the interaction force decreases in the presence of ATP (but not of ATPγS) and that the force is smaller for native-like proteins than for the fully denatured ones. It also demonstrates that the interaction energy with GroEL increases with increasing molecular weight. By measuring the interaction force changes between the chaperonin and the two different substrate proteins, we could specifically detect GroEL conformational changes upon nucleotide binding.
伴侣蛋白 GroEL 和 GroES:来自原子力显微镜的视图。
DOI: 10.1016/s0006-3495(96)79422-5
发表时间: 1996
影响因子: 3.4
作者:
Mou,J;Sheng,S;Ho,R;Shao,Z
通讯作者: Shao,Z
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DOI: 10.1021/la00004a051
发表时间: 1995
期刊: Langmuir : the ACS journal of surfaces and colloids
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发表时间: 1995-06-01
影响因子: 3.4
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DOI: --
发表时间: 1985
期刊: The Journal of biological chemistry
影响因子: --
作者:
Detrich3rd,HW;Jordan,MA;Wilson,L;WilliamsJr,RC
通讯作者: WilliamsJr,RC