用基因编码的含有亚酸的非正规氨基酸来增强细菌溶解活动的工程内素
Kejing Qi1, Ming Gao2, Bowen Lu1
1Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan 430072, China.
ACS synthetic biology
|November 19, 2025
概括
遗传密码的扩展增强了内素,强大的抗菌蛋白,对抗多药耐药的阴性细菌. 工程内素显示出更好的稳定性和广泛的活性,提供了新的抗生素策略.
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:
- 格拉姆阴性细菌的多药耐药性是全球主要的健康威胁.
- 菌体内素是具有治疗潜力的特定抗菌蛋白.
- 遗传密码的扩展允许特定于特定地点的非正规氨基酸 (ncAAs) 的结合来设计蛋白质功能.
研究的目的:
- 使用遗传密码扩展,设计具有增强细菌溶解活性和稳定性的内素.
- 研究将特定的非正规氨基酸 (ncAA) 纳入针对格兰阴性细菌的内素的影响.
主要方法:
- 遗传密码扩展被用来引入ncAAs,如p-azido-l-phenylalanine (pAzF) 和azidonor-leucine (AnzL),进入内素LysPA26和LysDLP1.
- 在各种条件下 (温度,结) 评估了工程内素的细菌解活性和稳定性.
主要成果:
- 在LysPA26的R16位置加入pAzF显著增加了其广泛的细菌分解活性和耐温度和冷的稳定性.
- 与野生类型相比,工程LysPA26-R16pAzF变种显示出增强的活性.
- 将AnzL纳入LysPA26和pAzF纳入LysDLP1也导致了细菌分解活性的提高.
结论:
- 非正规氨基酸可以有效地纳入内素,以增强其抗微生物特性.
- 工程内素显示出作为新型治疗药物对抗多药耐药格兰氏阴性细菌的潜力.
- 这一战略对素工程和新抗生素的开发具有重大意义.
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