域间循环调节了TEM类型扩展光谱β-乳糖酶抗生素耐药活性的构造动态
Tsz-Fung Wong1, Pui-Kin So2, Wai-Po Kong1
1State Key Laboratory of Chemical Biology and Drug Discovery, Food Safety and Technology Research Centre, Research Centre for Chinese Medicine Innovation, and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, the Hong Kong Special Administrative Region of China; State Key Laboratory of Chinese Medicine and Molecular Pharmacology (Incubation), and Shenzhen Key Laboratory of Food Biological Safety Control, Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, China.
在TEM型扩展谱β-乳酸酶 (ESBLs) 中的突变改变了酶动态,影响了抗生素耐药性. 了解这些形状变化是打击细菌耐药性和开发新药的关键.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 微生物学 微生物学
背景情况:
- 扩展谱β-乳酸酶 (ESBLs) 赋予了对关键抗生素的耐药性.
- 由于其流行程度,TEM类型的ESBL是一个重大的全球健康问题.
- 突变对TEM型ESBL动态和抗性的确切影响尚未完全理解.
研究的目的:
- 研究特定突变 (G238S,E104K,M182T) 如何影响TEM型ESBL的构造动态.
- 为了将这些动态变化与酶的扩展谱抗生素耐药性相关联.
- 阐明域间循环在ESBL功能和演变中的作用.
主要方法:
- 使用/交换质谱法 (HDX-MS).
- 集成的HDX-MS数据与分子动态 (MD) 模拟.
- 分析了酶域和域间循环的结构动态.
主要成果:
- 单个和组合突变显著改变跨域和循环的酶构造动态.
- 域间循环对不同的突变和基质结合表现出明显的动态反应.
- 这些动态变化与催化效率和抗生素耐药性有关.
结论:
- 突变驱动的结构动力学是TEM型ESBL抗生素耐药性的核心.
- 域间循环在调节ESBL动态和功能方面发挥着至关重要的作用.
- 这些发现为新型抑制剂设计和理解β-乳酸酶演变提供了洞察力.
更多相关视频
11:36A Protocol for Functional Assessment of Whole-Protein Saturation Mutagenesis Libraries Utilizing High-Throughput Sequencing
Published on: July 3, 2016
08:58Isolation and Identification of Waterborne Antibiotic-Resistant Bacteria and Molecular Characterization of their Antibiotic Resistance Genes
Published on: March 3, 2023
相关概念视频
Development of Antibiotic Resistance
Antibiotic Selection
Antimicrobial Proteins
Interferons
Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...
Gene Regulation in Microbial Communities: Quorum Sensing
Gram-negative Bacterial Protein Secretion Systems
Bacterial Translocation and Protein Secretion
