Unequivocal single-molecule force spectroscopy of intrinsically disordered proteins.

Unequivocal single-molecule force spectroscopy of intrinsically disordered proteins.
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本质无序蛋白质的明确单分子力谱。

DOI:
10.1007/978-1-4614-3704-8_5
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发表时间:
2012
影响因子:
--
通讯作者:
M. Carrión
M. Carrión
中科院分区:
--
文献类型:
--
作者:
J. Oroz;R. Hervás;Alejandro Valbuena;M. Carrión

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预计内在无序蛋白(IDP)约占真核蛋白质组的三分之一。这种稳定增长的蛋白质类别的动态构象集合仍然很难通过大量生物物理技术获得。然而,单分子技术提供了研究这些蛋白质的有用方法。基于原子力显微镜 (AFM) 的单分子力谱 (SMFS) 就是此类技术之一,它具有某些特殊性,使其成为分析 IDP 生物物理特性的重要方法。然而,该技术固有的几个缺点可能会使这种分析变得复杂。我们开发了一种蛋白质工程策略来克服这些缺点,以便可以轻松地对蛋白质(包括 IDP)进行明确的机械分析。使用这种方法,我们最近表征了几种 IDP 的丰富构象多态性。在这里,我们描述了一个使用这种新策略对 IDP 进行纳米力学分析的简单协议,原则上该程序也可以用于任何蛋白质的纳米力学分析。
Intrinsically disordered proteins (IDPs) are predicted to represent about one third of the eukaryotic proteome. The dynamic ensemble of conformations of this steadily growing class of proteins has remained hardly accessible for bulk biophysical techniques. However, single-molecule techniques provide a useful means of studying these proteins. Atomic force microscopy (AFM)-based single-molecule force spectroscopy (SMFS) is one of such techniques, which has certain peculiarities that make it an important methodology to analyze the biophysical properties of IDPs. However, several drawbacks inherent to this technique can complicate such analysis. We have developed a protein engineering strategy to overcome these drawbacks such that an unambiguous mechanical analysis of proteins, including IDPs, can be readily performed. Using this approach, we have recently characterized the rich conformational polymorphism of several IDPs. Here, we describe a simple protocol to perform the nanomechanical analysis of IDPs using this new strategy, a procedure that in principle can also be followed for the nanomechanical analysis of any protein.
DOI: 10.1073/pnas.98.2.468
发表时间: 2001-01
影响因子: 11.1
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A. Oberhauser;P. Hansma;M. Carrión-Vázquez;Julio M. Fernandez
通讯作者: A. Oberhauser;P. Hansma;M. Carrión-Vázquez;Julio M. Fernandez
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