A Novel Approach for the Evaluation of Positive Cooperative Guest Binding: Kinetic Consequences of Structural Tightening
作者:Romen Carrillo、Ezequiel Q. Morales、Víctor S. Martín、Tomás Martín
DOI:10.1002/chem.201300583
日期:2013.5.27
within receptors upon binding. According to such an interpretation, positive cooperative binding operates through structural tightening. Hence, a quite counterintuitive kinetic behavior for positively cooperative bound complexes may be postulated: the more stable the complex, the slower it is formed. Such a hypothesis was tested in a synthetic system in which positive cooperative binding was previously confirmed
合作性是生物分子显示的最相关的功能之一。因此,超分子化学领域的挑战之一是了解协同结合效应的潜在机制。传统上,合作性与多价受体有关,但是Williams等人。已经基于结合后受体内非共价相互作用的增强提出了不同的解释。根据这种解释,积极的合作约束是通过结构性紧缩来进行的。因此,可以假定对于正合作结合的复合物来说,其动力学行为是违反直觉的:复合物越稳定,形成的速度就越慢。这种假设在合成系统中进行了测试,在该系统中,先前已通过量热实验确认了积极的合作结合。的确,G °)和客体结合动力学(ΔG ≠)证实了预期的行为。这些独特的动力学提供了积极的客体结合的确凿证据,考虑到动力学实验在合成和生物系统中都经常且准确地进行,这一点特别有用。