通过改善辅助因子供应,增强Bacillus cereus的抗菌能力.
Yinbiao Xu1,2,3, Jiasong Wu1,2,3, Tingting Yuan1,2,3
1School of Life Sciences, Henan University, Kaifeng, 475004, China.
Microbial cell factories
|March 6, 2025
概括
细菌谷物 0-9 谷物菌
科学领域:
- 微生物学 微生物学
- 生物技术是生物技术.
- 酶工程是什么? 酶工程是什么?
背景情况:
- 谷菌 0-9 是一种具有有限抗菌活性的生物控制剂.
- 抗微生物分泌是其功能的关键.
- 增强酶活性可以提高生物控制的有效性.
研究的目的:
- 为了提高Bacillus cereus 0-9.0 的抗菌活性.
- 为了提高Bacillus subtilis葡萄糖脱酶 (BsGDH) 的催化效率.
- 探索生物控制应用的酶工程策略.
主要方法:
- 在Bacillus cereus 0-9中,Bacillus subtilis葡萄糖脱酶 (BsGDH) 的过度表达.
- 基于保存分析和分子对接的BSGDH的位点定向突变发生.
- 酶活性测定和运动分析 (Kcat/Km).
- 模拟分子动力学以分析形状变化.
主要成果:
- 过度表达野生型BsGDH增加了66%的抗菌活性.
- 突变BsGDH (N97F/N192S/E198G) 的特定活性是5.66倍高,Kcat/Km是11.38倍高.
- 改造的B. cereus 0-9表现出2.26倍的抗菌活性.
- 突变增强了活性口袋的灵活性和基质亲和力.
结论:
- BsGDH的酶工程显著提高了Bacillus cereus 0-9的生物控制潜力.
- 向突变提高了酶的催化效率和抗菌产量.
- 这种方法为工业生物控制应用提供了一个有希望的策略.
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