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在病原性细菌中采集高活性抗生物膜糖化物酸酶的域驱动采矿

Jialin Li¹, Xinyue Liu¹, Jing Zuo¹

¹NHC Key Laboratory of Biotechnology for Microbial Drugs, CAMS Key Laboratory of Synthetic Biology for Drug Innovation, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China.

International journal of biological macromolecules

|August 20, 2025

概括

研究人员从致病性细菌中发现了新的抗生物膜酶PgaB_Ab1和PgaB_Kp. 这些甘氨酸酸酶有效地破坏和抑制Staphylococcus epidermidis生物膜,提供了对慢性感染的新策略.

科学领域:

微生物学微生物学
生物化学生物化学
药物发现药物发现药物发现

背景情况:

生物膜形成是慢性感染中抗菌素耐药性的关键机制.
病原体基因组中的甘氨酸酸酶对于生物膜的发展和分散至关重要.
准这些酶是一个有前途的治疗途径.

研究的目的:

开发一种系统的管道,用于选来自Klebsiella pneumoniae和Acinetobacter baumannii的抗生物膜甘酸化酶.
识别和描述具有强大的抗生物膜活性的新型酶.
探索这些酶对抗Staphylococcus epidermidis生物膜的治疗潜力.

主要方法:

基因组挖掘用于甘氨酸酸酶候选物.
候选酶的重组表达和净化.
在体外测试以评估抗生物膜活性和酶特性.
对生物膜分散和增强甲基西林敏感性的机制研究.

主要成果:

成功选了13种候选酶,其中7种在可溶性形式表达.
确定了PgaB_Ab1和PgaB_Kp,它们对S. epidermidis具有强大的抗生物膜活性.
PgaB_Ab1在生物膜破坏 (EC₅₀ 2.83 nM) 和抑制 (EC₅₀ 4.53 nM) 中表现出高疗效.
酶降解dPNAG,调解生物膜分散并增强抗生素敏感性.

结论:

病原性细菌是治疗性抗生物膜糖化物酸酶的宝贵来源.
PgaB_Ab1和PgaB_Kp代表了对抗慢性生物膜感染的有希望的候选人.
生物膜的酶降解可以恢复抗生素的疗效.

关键词:

抗生物膜是一种抗生物膜.抗生素敏感性抗生素敏感性甘酸酸盐酸酶是什么致病性细菌是一种致病性细菌.

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