菌体Enc34endolysin的酶活性域的重组设计,以提高其对格兰氏阴性细菌的活性
Tatjana Kazaka1, Nikita Zrelovs1, Inara Akopjana1
1Latvian Biomedical Research and Study Centre, Ratsupites 1 k-1, Riga LV-1067, Latvia.
FEMS microbiology letters
|December 14, 2024
概括
工程内素,将酶活性域与抗菌结合起来,显示出治疗阴性细菌感染的前景. 这些新型的融合蛋白显示出对大肠杆菌等细菌的快速杀菌活性.
科学领域:
- 生物化学和分子生物学
- 抗菌研究 抗菌研究
- 菌体技术 菌体技术
背景情况:
- 恩多利辛是菌体编码的酶,向细菌的酸盐.
- 原生内素对阳性细菌是有效的,但由于它们的外膜,对阴性细菌是有限的.
- 再组合内素可以被设计为增强对格拉姆阴性细菌的活性.
研究的目的:
- 为了研究融合蛋白质的溶性潜力,将一个内溶酶酶活性域 (EAD) 与抗菌结合起来.
- 开发新型抗菌剂,有效对抗阴性细菌.
主要方法:
- 生成和表达的融合蛋白结构,涉及菌体Enc34内素的EAD和大肠杆菌中选择的抗菌.
- 纯化的重组融合蛋白质,可以在细胞内溶解细胞.
- 测试了纯化聚变蛋白对格拉姆阴性细菌的杀菌活性.
主要成果:
- 产生了几种融合蛋白变体,其中一些表现出细胞内溶解活性.
- 纯化的聚变蛋白被测试出其杀菌功效.
- 最有效的融合蛋白迅速降解大肠杆菌XL1-蓝细胞,在几分钟内减少可活细胞数量超过三倍.
结论:
- 工程内素-抗微生物融合显示出针对格拉姆阴性细菌的显著杀菌活性.
- 这些发现为设计新的抗菌工具来对抗多药耐药性感染提供了有希望的策略.
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