纳米化混合型橄胺折叠体:用于折叠多个异形单元的芳香模板
David Sánchez-García1, Brice Kauffmann, Takahiro Kawanami
1Institut Européen de Chimie et Biologie, Université de Bordeaux-CNRS UMR5248, 2 rue Robert Escarpit, 33607 Pessac, France.
Journal of the American Chemical Society
|June 18, 2009
概括
研究人员利用氨酸 (Q) 和氨酸 (P) 单体合成了新型的氨酸折叠体. 这些长而稳定的螺旋结构可以通过调整单体比和序列来精确控制.
科学领域:
- 超分子化学 超分子化学
- 聚合物科学 聚合物科学
- 有机合成 有机合成
背景情况:
- 奥利戈胺是用于创建复杂分子架构的多功能构建模块.
- 控制寡合物的结构稳定性和折叠模式对于设计功能性材料至关重要.
研究的目的:
- 为了合成和描述新型的含有8-amino-2-quinolinecarboxylic 酸 (Q) 和6-aminomethyl-2-pyridinecarboxylic 酸 (P) 的新型橄胺折叠体.单位.
- 为了研究单体序列和比重对折叠机形状,稳定性和折叠行为的影响.
- 为了证明长,明确的折叠模具有可调节的螺旋稳定性的高效阶段合成.
主要方法:
- 逐步合成的奥利戈胺基序列.
- 用于固态结构分析的X射线晶体学.
- 核磁共振 (NMR) 光谱仪用于溶液状态的结构分析.
- 染色学技术用于表征寡合物性质.
主要成果:
- 的阿利法胺促进了胺合,使得最多40个单元序列的合成成为可能.
- Q (n) 寡合物形成稳定的螺旋结构,而P (n) 寡合物本质上不会折叠.
- 纳入P单元可以影响基于Q的螺旋折叠,其影响取决于P单元的位置.
- 在 Q 丰富序列中的非连续的 P 单元采用螺旋形状,随着长度的增加,增加了螺旋总体的稳定性.
- 一个 (PQ(4)) ((8) 40mer形成了一个稳定的,棒状的螺旋,5.6nm.
结论:
- 长,纳米尺度折叠体的高效阶段合成是可以实现的.
- 折叠机螺旋稳定性可以通过控制Q和P单体的比率和序列来精确调整.
- 这些发现为设计具有量身定制的结构和功能性质的新型折叠材料打开了道路.
相关概念视频
Protein Folding
Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
Protein Folding
Overview
Protein Folding
Overview
Protein Organization
Overview
Molecular Chaperones and Protein Folding
The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
The...
The...


