在Oleidesulfovibrio alaskensis G20中依赖pH的基因型和表型变异性
Priya Saxena1,2, Dipayan Samanta1, Payal Thakur1,2
1Department of Chemical and Biological Engineering, South Dakota School of Mines and Technology, Rapid City, South Dakota, USA.
Applied and environmental microbiology
|March 26, 2025
概括
降硫酸盐细菌 (SRB) 通过改变生长和基因表达来适应pH值的变化. 这项研究揭示了SRB在极端pH值下生存的机制,有助于生物修复和无氧消化.
科学领域:
- 微生物学与环境科学 微生物学与环境科学
- 生物地质化学循环的过程
- 细菌生理学 细菌生理学
背景情况:
- 减少硫酸盐的细菌 (SRB) 对全球硫和碳循环至关重要.
- 在生物修复和无氧消化过程中,SRB至关重要.
- 对SRB对pH波动的基因型和表型反应的理解有限.
研究的目的:
- 研究pH值变化 (6,7和8) 对*Oleidesulfovibrio alaskensis* G20生长和基因表达的时间影响.
- 在SRB中阐明pH依赖的遗传和代谢适应.
- 为工业应用提供对SRB pH平衡机制的见解.
主要方法:
- 在pH 6,7和8下培养Oleidesulfovibrio alaskensis* G20 在pH 6,7和8.
- 监测生长动态,乳酸消耗和生产.
- 分析与ATPases,化酶和细胞分裂 (FtsZ) 相关的基因表达.
主要成果:
- 在pH 7下观察到最佳的生长和乳酸消耗;在pH 8下观察到减少的生长和消耗.
- 在酸性和性条件下都发生了显著的气生产.
- 对ATP酶,酶,氨基酸合成和细胞分裂蛋白的pH特定调节 (*FtsZ*).
结论:
- *O. alaskensis* G20在对pH的反应中表现出显著的代谢灵活性.
- 机制包括质子,可逆的质子转化和氨基酸调节.
- 这些发现支持在极端pH环境中使用*O. alaskensis* G20来增强生物修复和无氧消化.
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