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一种用于简便纯化和单分子固定的肽标签系统。

A peptide tag system for facile purification and single-molecule immobilization.

机构信息

Department of Biochemistry and Molecular Biology, The University of Chicago, Chicago, Illinois 60637, USA.

出版信息

Biochemistry. 2009 Dec 22;48(50):11834-6. doi: 10.1021/bi901756n.

Abstract

A peptide fusion tag and accompanying recombinant capture reagents have been developed on the basis of the peptide-PDZ domain interaction and affinity clamps, a new class of affinity reagent. This system allows for single-step purification under mild conditions and stable capture of a tagged protein. The subnanomolar affinity, high force resistance (>30 pN), small size ( approximately 25 kDa, approximately one-sixth of the size of IgG), and monomeric nature of the affinity clamp are all superior features for many applications, in particular single-molecule measurements.

摘要

基于肽-PDZ 结构域相互作用和亲和夹,一种新型的亲和试剂,开发了一种肽融合标签和配套的重组捕获试剂。该系统允许在温和条件下进行单步纯化,并稳定捕获标记蛋白。亲和夹具有亚纳摩尔亲和力、高阻力 (>30 pN)、小尺寸(约 25 kDa,约为 IgG 大小的六分之一)和单体性质,这些都是许多应用的优异特性,特别是单分子测量。

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