有旋转门的洞穴调节了水中的绑定选择性和速率
Richard J Hooley1, Hillary J Van Anda, Julius Rebek
1The Skaggs Institute for Chemical Biology and Department of Chemistry, The Scripps Research Institute MB-26, 10550 North Torrey Pines Road, La Jolla, California 92037, USA.
Journal of the American Chemical Society
|March 23, 2006
概括
合成了一种具有旋转酸盐门的新型水溶性腔体. 这种分子宿主对小型疏水分子和较慢的客交换动力学具有增强的选择性.
科学领域:
- 超分子化学 超分子化学
- 有机化学 有机化学
- 主机和客人的化学反应
背景情况:
- 洞穴体是分子宿主,其刚性结构能够封装客分子.
- 设计水溶性洞膜对于水性环境中的应用至关重要.
- 控制客体结合和释放的动态是宿主-客体化学中的一个关键挑战.
研究的目的:
- 为了合成一种水溶性自折叠腔体.
- 调查酸组对客人选择性和汇率的影响.
- 探索这个洞穴在分子识别中的潜力.
主要方法:
- 合成了一种具有四个酸基团的新型水溶性岩.
- 用光谱技术来描述洞穴的结构和属性.
- 具有约束力的研究来评估各种疏水分子的客体选择性和动力学.
主要成果:
- 成功制备了一种水溶性,自折叠的体.
- 酸组作为动态的"旋转门"来控制进入腔的通道.
- 与父腔体相比,对小型疏水客的选择性有所增加.
- 观察到客人交换的速度明显减缓,这表明增强了约束稳定性.
结论:
- 开发的水溶性洞膜为在水性介质中进行选择性分子识别提供了一个独特的平台.
- 酸组提供的"旋转门"机制允许可调节的客串绑定动态.
- 这项研究为设计具有针对传感和分离应用的定制性质的先进宿主分子开辟了道路.
相关概念视频
Ligand Binding Sites
Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
Ligand Binding Sites
Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
Noncovalent Attractions in Biomolecules
Noncovalent attractions are associations within and between molecules that influence the shape and structural stability of complexes. These interactions differ from covalent bonding in that they do not involve sharing of electrons.
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
Noncovalent Attractions in Biomolecules
Noncovalent attractions are associations within and between molecules that influence the shape and structural stability of complexes. These interactions differ from covalent bonding in that they do not involve sharing of electrons.
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
The Equilibrium Binding Constant and Binding Strength
The equilibrium binding constant (Kb) quantifies the strength of a protein-ligand interaction. Kb can be calculated as follows when the reaction is at equilibrium:
The Equilibrium Binding Constant and Binding Strength
The equilibrium binding constant (Kb) quantifies the strength of a protein-ligand interaction. Kb can be calculated as follows when the reaction is at equilibrium:

