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在Archaeoglobaceae中,从陆地温泉中丰富的Mcr-依赖的甲基生成
Steffen Buessecker1, Grayson L Chadwick2, Melanie E Quan3
1Department of Earth System Science, Stanford University, Stanford, CA, USA. sbuessecker@stanford.edu.
The ISME journal
|July 14, 2023
概括
生物甲的生产主要来自使用甲基辅酶M减少酶 (Mcr) 的古生物. 这项研究证实了Archaeoglobaceae新型物种的Mcr依赖甲生成,扩大了已知的甲来源.
科学领域:
- 微生物学和地球化学
- 古代生物和甲循环循环.
背景情况:
- 甲基共酶M减少酶 (Mcr) 是古生物的生物甲生产的核心.
- 在不同的考古系中,基于Mcr的甲基生成的实验证据是有限的.
- 了解Mcr的功能对于确定生物甲来源至关重要.
研究的目的:
- 实验验证一种基于Mcr的功能性甲基生成途径在一个新的古物种中.
- 调查草甘及其衍生物在推动甲基生成中的作用.
- 描述Mcr酶及其在新发现的古生物中的遗传学背景.
主要方法:
- 从一个温泉中丰富和隔离一个新型的Archaeoglobaceae成员Methanoglobus nevadensis.
- 化试验测量甲产量,消耗和分离.
- 基因组组合的基因组恢复和Mcr酶的基因组学分析.
主要成果:
- 在M. nevadensis中证实了甲的产生,对Mcr抑制敏感,并受到xyloglucan的刺激.
- 的消耗和特有的分离表明变性和甲基变性甲基生成.
- 在M. nevadensis基因组中发现了一种不同的Mcr,它与其他研究不足的考古群体有遗传学联系.
结论:
- 在M. nevadensis中,甲基生成依赖于Mcr,并且可能由交叉养发酵副产品提供燃料.
- 不同的Mcr编码古生物,包括与M. nevadensis相关的古生物,可能是显著的,低估的甲来源.
- 这项研究验证了Mcr功能在一个新的考古遗迹中,扩大了我们对全球甲循环的理解.
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