通过局部导向的突变发生因子增强单体醇脱酶的活性,用于特定部位的应用
Arabella Essert1, Kathrin Castiglione1
1Institute of Bioprocess Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen 91052, Bavaria, Germany.
Protein engineering, design & selection : PEDS
|June 12, 2023
概括
研究人员设计了来自Thermococcus kodakarensis的单体酒精脱酶. 这些改进的酶表现出更高的活性和保存的反选择性,为生物催化剂提供了强大的工具包.
科学领域:
- 生物催化和酶工程 生物催化和酶工程
- 用于工业应用的蛋白质工程
- 酶级联和新陈代谢工程
背景情况:
- 酶反应级联需要优化生物催化剂以提高效率.
- 寡合酶在空间组织和酶不动化的静态度控制方面带来了挑战.
- 单质酶对于创建强大且可控的酶系统是可取的.
研究的目的:
- 为了设计一种罕见的单体醇脱酶,以提高催化活性和稳定性.
- 为了在中等温度下提高酶的性能,同时保持关键特性.
- 开发一种多功能单体酶,用于生物催化剂的应用.
主要方法:
- 来自Thermococcus kodakarensis的一种单体酒精脱酶的局部导向突变发生.
- 酶变体的活性,酶选择性和热力学稳定性的表征.
- 对运动性质的分析,包括区域选择性,pH依赖性和盐活性.
主要成果:
- 工程变体表现出显著增加的活性:2-heptanol的约5倍和3-heptanol的约9倍.
- 在改进的酶变体中成功保持了酶选择性和热力学稳定性.
- 观察到修改的动力特性,包括区域选择性,pH依赖性和NaCl激活.
结论:
- 位点定向突变发生可以有效地提高单体醇脱酶的催化性能.
- 工程酶为优化酶反应级联提供了宝贵的工具.
- 这些强大的单体生物催化剂在各种生物技术过程中提供了更好的应用性.
相关概念视频
Allosteric Proteins-ATCase
5.8K
Binding sites linkages can regulate a protein's function. For example, enzyme activity is often regulated through a feedback mechanism where the end product of the biochemical process serves as an inhibitor.
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis...
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis...
5.8K
Ligand Binding and Linkage
4.8K
Allosteric proteins have more than one ligand binding site; the binding of a ligand to any of these sites influences the binding of ligands to the other sites. When a protein is allosteric, its binding sites are called coupled or linked. In the case of enzymes, the site that binds to the substrate is known as the active site and the other site is known as the regulatory site. When a ligand binds to the regulatory site, this leads to conformational changes in the protein that can influence...
4.8K


