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在微空气条件下的化应激会触发Pseudomonas extremaustralis中的内醇代谢
Esmeralda C Solar Venero1, Lucia Giambartolomei2, Ezequiel Sosa3
1IQUIBICEN-CONICET, Buenos Aires, Argentina.
PloS one
|May 2, 2024
概括
极端虫利用伊诺西托尔来对抗化压力,提高生存率并产生皮奥维丁. 这项研究揭示了内醇代谢是细菌对抗氧化和化合物的关键防御机制.
科学领域:
- 微生物学 微生物学
- 细菌生理学 细菌生理学
- 压力反应应激反应
背景情况:
- 细菌面临来自反应性氧和物种的氧化和化压力,可能会损害细胞巨分子.
- 适应压力涉及细胞反应来应对代谢挑战.
研究的目的:
- 研究Pseudomonas extremaustralis对由S-nitrosoglutathione (GSNO) 诱导的化应激的全球转录基因反应.
- 探索伊诺西代谢在细菌应激耐受性和适应性中的作用.
主要方法:
- 在微空气条件下暴露于GSNO的P. extremaustralis的全球转录组分析 (RNAseq).
- 生理学测试以评估内醇利用率和应激耐受性.
- 测量pyoverdine生产的情况.
主要成果:
- 参与伊诺西代谢,转录,翻译,氨基酸代谢和抗压力 (例如,超氧化物失调酶,硫素) 的基因的升级.
- 编码化位蛋白的基因的差异表达和铁代谢基因的激活 (例如,pyoverdine合成).
- P. extremaustralis有效地利用内醇,从而提高了对氧化-化应激的耐受性,并增加了pyoverdine的产量.
结论:
- 化应激会影响易于化的蛋白质,并影响P. extremaustralis中的铁代谢.
- 肌肉中性醇 (myo-inositol) 代谢被激活,作为对化压力的保护机制,有助于细菌适应不利条件.
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