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微生物合作分子策略使低pH含水层中的1,2-二乙烯解毒成为可能

Siyan Zhao¹, Matthew J Rogers¹, Guofang Xu¹

¹Department of Civil and Environmental Engineering, College of Design and Engineering, National University of Singapore, Singapore 117576, Singapore.

Environmental science & technology

|August 11, 2025

概括

耐酸性有机化物呼吸细菌 (OHRB) 通过改变电子转移和能量保存来适应低pH值. 这允许在酸性环境中对污染物进行至关重要的生物修复.

科学领域:

微生物生态学微生物生态学
环境微生物学环境微生物学
生物修复是一种生物修复.

背景情况:

有机化物呼吸细菌 (OHRB) 对于排毒化污染物至关重要.
酸性环境对OHRB造成显著的压力,限制了它们的生物修复效率.
在OHRB中,酸性耐受性的机制尚不清楚.

研究的目的:

研究OHRB *Desulfitobacterium* sp. 的酸耐受机制. 这是一种AusDCA菌株.
了解AusDCA菌株如何在低pH下保持脱活性.
确定适应在酸性条件下生存和功能.

主要方法:

在不同的pH条件下对AusDCA菌株进行蛋白质组学分析 (pH为5.5比pH为7.0).
在pH范围内评估1,2-二chloroethane的呼吸和脱率.
分析与电子转移,质子减轻和能量保存相关的基因表达.

主要成果:

在pH 5.0下,AusDCA菌株表现出降低但持久的脱活性.
蛋白质组学揭示了在酸性应激下 (pH5.5) 转移到NADH作为主要电子捐赠体,具有改变的酶和NADH-氨酸氧化还原酶活性.
酸耐受性涉及去碳酸酶,循环基因,基本氨基酸生产和尼古丁酸盐发酵的上调,以及减少乙醇胺消耗和鞭.

结论:

菌株AusDCA在电子转移,质子管理和节能方面采用了多方面的适应,以在酸性环境中壮成长.
这些发现为微生物适应低pH压力提供了关键的见解.
已识别的机制为加强酸性污染场所的生物修复提供了潜在的战略.

关键词:

耐酸性耐受性耐酸性耐受性脱硫杆菌 (desulfitobacterium) 是一种有毒的细菌.有机化物呼吸细菌有机化物降低性脱化降低性脱化

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