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在温泉中同时进行有氧和无氧呼吸的化学石质培养细菌

Lisa M Keller¹, Daniel R Colman¹, Eric S Boyd²

¹Department of Microbiology and Cell Biology, Montana State University, Bozeman, MT, USA.

Nature communications

|January 27, 2025

概括

一种新型细菌,Hydrogenobacter,可以同时进行有氧和无氧呼吸,增强生长. 这挑战了微生物中这些代谢策略的严格分离.

科学领域:

微生物学微生物学
生物化学生物化学
环境科学环境科学

背景情况:

由于资源竞争和氧气不相容,有氧和无氧代谢通常是不同的.
微生物生命通常在时间或空间上将使用氧和不使用氧的过程分开.

研究的目的:

为了研究黄石国家公园的一种细菌Hydrogenobacter的代谢能力.
确定是否可能同时有氧和无氧呼吸及其对生长的影响.

主要方法:

从温泉环境中分离和培养Hydrogenobacter的方法.
气相色谱用于测量氧气消耗.
转录组分析以检测参与呼吸的基因.

主要成果:

水素菌证明了使用,硫和氧的同时有氧和无氧呼吸.
与单个模式相比,这种双重呼吸增强了生长率和细胞产量.
发现了同时发生的氧和硫减少途径的证据.

结论:

同时有氧和无氧呼吸在氧气水平波动的环境中提供了竞争优势.
这种混合代谢可能在细菌和古生物中广泛存在,但以前被忽视.
这些发现挑战了不同有氧和无氧微生物新陈代谢的既定范式.

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