在Salvia miltiorrhiza的功能性表征和蛋白质工程中,罗斯马林酸合成酶
Yue Feng1, Zhoulu Wang1, Junbo Li1
1Zhejiang Provincial International S&T Cooperation Base for Active Ingredients of Medicinal and Edible Plants and Health, Zhejiang Provincial Key TCM Laboratory for Chinese Resource Innovation and Transformation, School of Pharmaceutical Sciences, Jinhua Academy, Zhejiang Chinese Medical University, Hangzhou 310053, China.
研究人员从Salvia miltiorrhiza中特征化了罗斯马林酸合成酶 (RAS),识别了SmRAS1及其增强突变. 这项工作阐明了迷酸生物合成的机制,并为微生物生产提供了一个有前途的酶.
科学领域:
- 生物化学 生物化学
- 酶学 是一种酶学.
- 植物生物技术 植物生物技术
背景情况:
- 罗斯马林酸 (RA) 是一种具有健康益处的有价值化合物.
- 罗斯马林酸合成酶 (RAS) 是RA生物合成的关键.
- 从Salvia miltiorrhiza中获得的SmRAS的功能以前是未知的.
研究的目的:
- 为了识别和描述来自Salvia miltiorrhiza的SmRAS酶.
- 阐明SmRAS1.1的催化机制和基质特异性.
- 为了改造SmRAS1以提高催化效率.
主要方法:
- 来自Salvia miltiorrhiza的SmRAS基因的识别和克隆.
- 再组合表达和纯化SmRAS1.1.
- 酶动力学测试,位点定向突变发生,结构分析和分子动力学模拟.
主要成果:
- 再组合的SmRAS1成功地从咖啡-CoA和3,4-二基酸合成了RA.
- 在45°C和pH8.0时观察到SmRAS1的最佳活性.
- 突变R367W,G293I和G293R显著提高了SmRAS1的催化效率 (1.53-2.15倍).
- 结构分析表明,扩大基质接入和降低灵活性改善了酶活性.
结论:
- 该研究描述了SmRAS1,揭示了它在RA生物合成中的作用.
- 工程 SmRAS1 变种显示了显著提高的催化效率.
- 了解增强活性的结构基础为酶工程提供了基础.
- 这些发现为RA的微生物生产提供了一个有希望的RAS.
更多相关视频
09:27Functional Complementation Analysis FCA: A Laboratory Exercise Designed and Implemented to Supplement the Teaching of Biochemical Pathways
Published on: June 24, 2016
11:13Author Spotlight: Exploring Salidroside's Molecular Mechanisms in Breast Cancer Treatment
Published on: June 9, 2023
相关概念视频
Structure-Activity Relationships and Drug Design
SAR studies the intricate relationship between a drug's chemical structure and biological activity. It focuses on understanding how modifications to a drug's structure can influence...
Allosteric Proteins-ATCase
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...
Ligand Binding and Linkage
Adrenergic Agonists: Chemistry and Structure-Activity Relationship
Aromatic ring substitutions: Substituting the aromatic ring with –OH groups at positions 3 and 4 yields catecholamines (e.g., epinephrine), which have a high affinity for adrenoceptors. Hydrogen bonding between –OH groups and receptors enhances adrenergic activity.
Separation of...
