![Protein Film Infrared Electrochemistry Demonstrated for Study of H2 Oxidation by a [NiFe] Hydrogenase](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F55858.jpg&w=3840&q=50)
氧化媒介的模型驱动设计:量化子结构对用葡萄糖氧化酶对生物电催化活性的影响
Lincoln Mtemeri1, David P Hickey1
1Department of Chemical Engineering & Materials Science, Michigan State University, East Lansing, Michigan 48824, United States.
The journal of physical chemistry. B
|August 18, 2023
概括
研究人员开发了一种定量结构-活性关系 (QSAR) 模型,以预测生物电催化剂中氧化还原媒介的有效性. 这个模型通过了解介质结构如何影响用葡萄糖氧化酶 (GOx) 进行电子转移来优化酶电极接口.
科学领域:
- 生物电催化生物电催化
- 酶电化学酶电化学
- 生物催化剂是一种生物催化剂.
背景情况:
- 有效的生物电触媒依赖于氧化还原酶和电极表面之间的有效电子转移.
- 氧化还原介质有助于这种电子转移,但通常是经验选择的.
- 了解结构-功能关系对于合理的调解器设计至关重要.
研究的目的:
- 确定氧化还原介质中的结构功能关系,以预测它们与葡萄糖氧化酶 (GOx) 的反应速率.
- 为基调解剂开发一个定量结构-活性关系 (QSAR) 模型.
- 为设计改进的酶电极接口提供基础.
主要方法:
- 开发一个定量结构-活性关系 (QSAR) 模型,使用基于子的氧化还原介质库.
- 利用快速扫描停止流量光谱仪来研究反应动力学和静电学.
- 研究了金和GOx.的黄胺二核酸 (FAD+/FADH2) 辅因子之间的相互作用.
主要成果:
- 确定介质的氧化还原潜力和预测的分子面积作为预测子/GOx系统活性的关键参数.
- 建立了结构-功能关系,控制介质和GOx之间的双分子速率常数.
- 获得了对子-GOx辅因子反应的动力学和静电学的基本见解.
结论:
- 开发的QSAR模型为选择有效的氧化还原介质提供了一个预测工具.
- 这项研究推动了生物电催化酶电极接口的合理设计.
- 了解子结构对于控制电酶反应中的电子流量至关重要.
相关概念视频
01:17Oxidation of Phenols to Quinones
3.1K
In the presence of oxidizing agents, phenols are oxidized to quinones. Quinones can be easily reduced back to phenols using mild reducing agents. The electron-donating hydroxyl group enhances the reactivity of the aromatic ring, enabling oxidation of the ring even in the absence of an α hydrogen.
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
3.1K
01:23Redox Equilibria: Overview
587
A reduction-oxidation reaction is commonly called a redox reaction. In a redox reaction, electrons are transferred from one species to another rather than being shared between or among atoms. The reducing agent or reductant is the species that loses electrons and gets oxidized in the process. The species that gains electrons and gets reduced in the process is the oxidizing agent or oxidant. Redox reactions are represented as two separate equations called half-reactions, where one equation...
587
01:24Redox Reactions
55.8K
Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
55.8K
01:43Electron Transport Chain: Complex III and IV
7.6K
During the electron transport chain, electrons from NADH and FADH2 are first transferred to complexes I and II, respectively. These two complexes then transfer the electrons to ubiquinol, which carries them further to complex III. Complex III passes the electrons across the intermembrane space to Cyt c, which carries them further to complex IV. Complex IV donates electrons to oxygen and reduces it to water. As electrons pass through complexes I, III, and IV, the energy released aids the pumping...
7.6K
01:26Redox Titration: Other Oxidizing and Reducing Agents
330
Besides iodine, other oxidizing or reducing agents can serve as titrants in redox titrations. Common oxidizing titrants include KMnO4, cerium(IV), and K2Cr2O7. The choice of oxidizing titrants depends on factors like stability, cost, analyte strength, and reaction rate between the analyte and titrant. KMnO4 is a strong oxidizing titrant that reduces from Mn(VII) to Mn(II) in a highly acidic solution, simultaneously oxidizing the analyte to a higher oxidation state. In this case, KMnO4 acts as a...
330
01:30Ladder Diagrams: Redox Equilibria
479
Ladder diagrams are useful tools for understanding redox equilibrium reactions, especially the effects of concentration changes on the electrochemical potential of the reaction. The vertical axis in the redox ladder diagrams represents the electrochemical potential, E. The area of predominance is demarcated using the Nernst equation.
Consider the Fe3+/Fe2+ half-reaction, which has a standard-state potential of +0.771 V. At potentials more positive than +0.771 V, Fe3+ predominates, whereas Fe2+...
Consider the Fe3+/Fe2+ half-reaction, which has a standard-state potential of +0.771 V. At potentials more positive than +0.771 V, Fe3+ predominates, whereas Fe2+...
479