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短肽中螺旋含量的光控

Photo-control of helix content in a short peptide.

作者信息

Kumita J R, Smart O S, Woolley G A

机构信息

Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto M5S 3H6, Canada.

出版信息

Proc Natl Acad Sci U S A. 2000 Apr 11;97(8):3803-8. doi: 10.1073/pnas.97.8.3803.

Abstract

The alpha-helix is a key structural element in a wide range of peptides and proteins. We report here the design, synthesis, and characterization of a modified peptide in which the helix content can be reversibly photoregulated. The peptide contains two cysteine residues that are cross-linked by an azobenzene derivative in an intramolecular fashion. In accordance with the design, the photoisomerization of the azobenzene cross-linker from the trans to the cis form causes a large increase in the helix content of the peptide, in water.

摘要

α-螺旋是多种肽和蛋白质中的关键结构元件。我们在此报告一种修饰肽的设计、合成及表征,其螺旋含量可通过光进行可逆调节。该肽含有两个半胱氨酸残基,它们通过分子内的偶氮苯衍生物交联。按照设计,偶氮苯交联剂从反式到顺式的光异构化导致该肽在水中的螺旋含量大幅增加。

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