分子化条件影响Bacillus subtilis子的表面和粘附性质
Audrey Hamiot1, Christelle Lemy1, Frederic Krzewinski2
1Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207 - UMET - Unité Matériaux et Transformations, Lille, France.
Frontiers in microbiology
|September 18, 2023
概括
分子化条件显著改变 Bacillus subtilis 子表面的特性,使它们更加疏水和粘附. 子粘附的这些变化有助于解释它们经常污染食品加工线.
科学领域:
- 微生物学 微生物学
- 食品科学 食品科学 食品科学
- 细菌生理学 细菌生理学
背景情况:
- 形成子的细菌,特别是细菌细菌 (Bacillus subtilis),由于它们的耐药子,导致食物反复腐烂.
- B. subtilis 子在表面上持续存在,导致食品加工环境中的污染.
- 虽然子形成会影响子的抗性,但它对表面和粘附性能的影响却不太清楚.
研究的目的:
- 为了研究13种不同的化条件如何影响B. subtilis168种子的表面和粘附特性.
- 确定这些条件对子的碳水化合物和蛋白质组成的影响.
主要方法:
- 在13种不同的分泌条件下培养B. subtilis 168.
- 分析子表面的疏水性和粘附性质.
- 评估胞皮的碳水化合物和蛋白质组成.
主要成果:
- Ca2+或Mg2+的耗尽,低氧,酸性pH和氧化应激产生了更多的疏水性和粘附性子.
- 在Ca2+/Mg2+耗尽或氧气不足的情况下,观察到缺陷的胞皮质甘氨酸与减少的拉姆诺斯和军团氨基酸.
- 低氧或过氧化压力降低了地蛋白CgeA和CotY的水平,可能是通过转录抑制.
结论:
- 分子化条件对B. subtilis子表面和粘附性质进行了批判性调节.
- 变化的子表面特征,由子化过程中特定的环境线索驱动,有助于它们污染食品加工线路的能力.
- 了解这些机制可以为控制食品工业中B. subtilis污染的策略提供信息.
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