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在Pediococcus acidilactici BCB1H中阐明由铁 (Fe²⁺) 调节的外聚糖合物生物合成,采用多奥米克方法

Gege Hu¹, Hangyu Hu¹, Zengjia Zhou¹

¹Key Laboratory of Geriatric Nutrition and Health of Ministry of Education, Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing 100048, China.

International journal of biological macromolecules

|April 9, 2025

概括

铁 (Fe2+) 在Pediococcus acidilactici BCB1H中显著增加了外聚糖 (EPS) 的产生. 这项研究使用了多种奥米学来揭示Fe2+如何调节关键的代谢途径,增强EPS合成的潜在工业应用.

科学领域:

微生物学微生物学
生物化学生物化学
代谢学代谢学代谢学

背景情况:

外聚糖 (EPS) 是由乳酸细菌 (LAB) 生产的重要生物聚合物.
与其他实验室相比,对儿科菌,特别是Pediococcus acidilactici的EPS生产的研究较少.
了解EPS合成的调节对于优化其生产至关重要.

研究的目的:

研究铁 (Fe2+) 对Pediococcus acidilactici BCB1H.EPS合成中的铁 (Fe2+) 的作用.
通过使用多omics方法阐明Fe2+介导的EPS生产背后的监管机制.

主要方法:

采用了结合转录组学,蛋白组学和代谢组学的多组学策略.
在Pediococcus acidilactici BCB1H中分析了基因,蛋白质和代谢物表达特征,有或没有Fe2+补充.
在不同的条件下量化EPS生产.

主要成果:

补充Fe2+ (0.6g/L) 显著增加了EPS产量,从225.5mg/L增加到271.5mg/L.
观察到光转移酶系统 (PTS) 的升级,这是EPS合成的关键途径.
确定了关键基因的差异表达 (例如,Gnd,AccD,EIIs上调;GlpK,AdhP下调) 和代谢途径 (酸,TCA循环,糖解/葡萄糖生成,糖脂代谢).

结论:

Fe2+通过调节中央碳代谢途径,增强了Pediococcus acidilactici BCB1H中的EPS合成.
这项研究提供了对儿科菌中EPS生物合成的调节机制的见解.
这些发现有助于更深入地了解乳酸细菌中EPS生产控制.

关键词:

生物合成生物合成外聚糖化物 (EPS) 是一种铁 (Fe2+) 是一种多个omics的多个omics.这种病原体是Pediococcus acidilactici.

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