在E.E.中探索TEM β-乳酸酶. coli从尿路感染患者:从分子对接和动力学模拟的见解
Tina Rostinawati1, Ferlia Pratiwi Riski Aly1, Imam Adi Wicaksono2
1Department of Pharmaceutical Biology, Faculty of Pharmacy, Padjadjaran University, Bandung, West Java, Indonesia.
Infection and drug resistance
|October 16, 2025
概括
尿路感染中的抗生素耐药性正在增加,这是由于TEMβ-乳糖酶的作用. 虽然一些抗生素具有强烈的结合力,但酶活性决定了疗效,指导了未来对大肠杆菌感染的药物开发.
科学领域:
- 微生物学 微生物学
- 计算生物学 计算生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 在大肠杆菌 (E. coli) 中抗生素耐药性的增加,对治疗尿路感染 (UTI) 构成了重大挑战.
- TEMβ-乳酸酶酶是耐药性的主要驱动因素,通过水解β-乳酸抗生素.
- 了解TEM蛋白变体对药物结合和稳定性的影响,对于有效的治疗策略至关重要.
研究的目的:
- 分析来自临床*大肠杆菌*分离物和各种抗生素的TEMβ-乳糖酶之间的相互作用.
- 通过分子对接和动态模拟来阐明导致抗生素耐药性的因素.
- 为指导未来对抗耐药细菌感染的治疗策略的开发提供指导.
主要方法:
- 从临床分离物获得的*TEM*β-乳糖酶基因的放大和测序.
- 基于PDB ID 1JWV的蛋白质模型的构建,用于计算分析.
- 分子对接和动态模拟以评估抗生素蛋白相互作用,与体外数据相关联.
主要成果:
- 第一代脑素表现出强烈的结合,但由于TEM-1β-乳酸酶的水解而无效.
- 后一代类素,氨基甘油酸和碳烯胺证明了有效性,归因于结构弹性或替代机制.
- 仅仅结合能量并不能预测抗生素的有效性;酶稳定性和水解速率是关键因素.
结论:
- 后一代类素,卡巴胺和氨基糖化物对TEM-1β-乳酸酶表现出稳定的相互作用和弹性.
- 第一代类的临床无效性与快速的酶性水解有关,尽管结合性强.
- 将计算结合/稳定性数据与临床见解相结合,对于预测抗生素对TEM-1-介导耐药性的有效性至关重要.
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