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一氧化碳脱酶编码的微生物在火山天体生物学类型:一个酶系统来研究生命的进化

Vito Latorre¹, Xabier Vázquez-Campos², Belinda Ferrari²

¹School of Biological Sciences, University of East Anglia, NR4 7TJ, UK.

FEMS microbiology ecology

|February 25, 2026

概括

火山土壤中的微生物使用一氧化碳 (CO) 作为能量,这对生命至关重要.

科学领域:

天体生物学天体生物学
地质微生物学的生物.
生物地质化学生物地质化学

背景情况:

火山环境是早期地球和外星生命的类比.
使用一氧化碳 (CO) 等无机气体的微生物是主要的初级殖民者.
类似的条件存在于火星,金星和冰冷的卫星上,这表明二氧化碳是潜在的代谢基质.

研究的目的:

审查一氧化碳脱酶 (CODH) 的进化意义.
将地球化学能量流与生物碳的起源联系起来.
研究在火山环境中的微生物生存策略及其对天体生物学的影响.

主要方法:

来自全球八个火山遗址的微生物群落的基因组分析.
对为有氧 (coxL) 和无氧 (cdh-, coo-) 途径编码CO脱酶 (CODH) 的基因的检查.
在不同的火山环境中对基因分布和丰富性的比较分析.

主要成果:

在所有采样的火山遗址中检测到CODH的基因.
有氧CO氧化基因 (coxL) 丰富且保存.
厌氧CO氧化基因显示了特定地点的模式,反映了微生物社区和环境变异.
波阿斯火山的Desulfobacterota族群在CO代谢中表现出显著的遗传适应性.

结论:

微量气体代谢,特别是CO氧化,支持火山土壤中的微生物生命.
CODH基因的存在和多样性表明微生物广泛适应CO作为能源.
这些发现提供了对其他具有火山活动和二氧化碳可用性的行星天体的潜在可居住性的见解.

关键词:

在CO脱水酶中.一氧化碳的一氧化碳.太阳系外行星是外行星.维护能维护能维护能土壤微生物土壤微生物火山沉积物的火山沉积物.

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