Unfoldase-mediated protein translocation through an α-hemolysin nanopore.

Unfoldase-mediated protein translocation through an α-hemolysin nanopore.
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DOI:
10.1038/nbt.2503
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发表时间:
2013-03
影响因子:
46.9
通讯作者:
--
中科院分区:
工程技术1区
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--
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使用纳米孔来测序生物聚合物是十多年前提出的。基于酶的DNA易位控制和使用修饰的生物孔的DNA核苷酸解析的最新进展已经满足了功能性纳米孔DNA测序装置的两个技术要求。还设想了蛋白质的纳米孔测序。虽然蛋白质已被证明可以通过纳米孔移动,但尚未证明展开蛋白质进行性易位的技术。在这里,我们描述了使用AAA+解折叠酶ClpX通过α-溶血素(α-HL)孔控制蛋白质的解折叠和易位。在易位过程中检测到单个工程蛋白的序列依赖性特征。这些结果表明,分子马达可以重复驱动蛋白质通过模型纳米孔-蛋白质序列分析所需的功能,使用这种单分子技术。
Using nanopores to sequence biopolymers was proposed more than a decade ago. Recent advances in enzyme-based control of DNA translocation and in DNA nucleotide resolution using modified biological pores have satisfied two technical requirements of a functional nanopore DNA sequencing device. Nanopore sequencing of proteins was also envisioned. Although proteins have been shown to move through nanopores, a technique to unfold proteins for processive translocation has yet to be demonstrated. Here we describe controlled unfolding and translocation of proteins through the α-hemolysin (α-HL) pore using the AAA+ unfoldase ClpX. Sequence-dependent features of individual engineered proteins were detected during translocation. These results demonstrate that molecular motors can reproducibly drive proteins through a model nanopore—a feature required for protein sequence analysis using this single-molecule technology.
DOI: 10.1016/j.bbamcr.2011.06.007
发表时间: 2012-01
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