机器学习辅助的代谢学解码了Bacillus生物膜的适应性重塑,以应对巴氏化压力
Lijiao Liang1,2, Ping Wang3, Xiaomei Zhao1
1Chinese Academy of Quality and Inspection&Testing, Beijing, China.
NPJ science of food
|January 20, 2026
概括
细菌物种通过耐热生物膜挑战乳制品的安全性. 这项研究揭示了菌株特定的代谢适应,可以在热应激下增强生物膜的形成,为乳制品的保存提供了新的目标.
科学领域:
- 微生物学 微生物学
- 食品科学 食品科学 食品科学
- 代谢学 代谢学 代谢学
背景情况:
- 细菌物种对低温乳制品的安全性和保质期构成重大挑战.
- 耐热子和生物膜的细菌种类. 它可以在巴氏杀菌过程中存活下来,从而损害产品质量.
- 热处理可以矛盾地促进某些细菌菌株的生物膜形成,这是一个鲜为人知的现象.
研究的目的:
- 为了阐明原牛奶中热诱导生物膜增强的代谢适应,Bacillus分离.
- 为了确定驱动在热应力下生物膜形成的菌株特异性代谢机制.
- 发现新的代谢标,以提高乳制品的安全性和防止生物膜污染.
主要方法:
- 利用非向的代谢学来分析细菌分离物的代谢概况.
- 采用随机森林分析来确定关键的代谢途径和参与生物膜形成的分子.
- 在特定的细菌菌株 (BC01和BS01) 中,研究了热应激反应的代谢变化.
主要成果:
- 确定了针对热量诱导的生物膜增强的特定菌株代谢策略.
- 在Bacillus菌株BC01中,热应激通过谷氨酸酶激活导致L-谷氨酸和氨酸耗尽,促进生物膜基因.
- 在Bacillus菌株BS01中,代谢重组降低了生物膜抑制剂如阿尔金宁和多巴胺的合成,促进生物膜的形成.
结论:
- 澄清了在乳制品环境中在热应激下适应细菌生物膜的代谢驱动因素.
- 突出了特定代谢物的作用 (例如,L-Glutamine,histidine,arginine,dopamine) 在调节热引起的生物膜形成.
- 提出了新的代谢干预策略,以提高乳制品的安全性和控制Bacillus生物膜.
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