Comparison of backbone modification in protein β-sheets by α→γ residue replacement and α-residue methylation
作者:George A. Lengyel、Zachary E. Reinert、Brian D. Griffith、W. Seth Horne
DOI:10.1039/c4ob00886c
日期:——
The mimicry of protein tertiary structure by oligomers with unnatural backbones is a significant contemporary research challenge. Among common elements of secondary structure found in natural proteins, sheets have proven the most difficult to address. Here, we report the systematic comparison of different strategies for peptide backbone modification in β-sheets with the goal of identifying the best method for replacing a multi-stranded sheet in a protein tertiary fold. The most effective sheet modifications examined led to native-like tertiary folding behavior with a thermodynamic folded stability comparable to the prototype protein on which the modified backbones are based.
通过不自然骨架的聚合物模拟蛋白质三级结构是当今一个重要的研究挑战。在天然蛋白质中常见的次级结构元素中,层析结构被证明是最难处理的。在这里,我们报告了不同策略进行肽骨架改造以形成β-层的系统比较,目的是确定替换蛋白质三级折叠中的多股层的最佳方法。所检查的最有效的层析改造导致了类似本征的三级折叠行为,其热力学折叠稳定性与所基于的原型蛋白相当。