以为依赖的异样化酸盐降解为可以使坎皮洛巴克托拉菌株分离物生长
Hokwan Heo1, Thanh Nguyen-Dinh2, Man-Young Jung3,4
1Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST) Daejeon, 34141, Republic of Korea.
The ISME journal
|May 14, 2025
概括
分离性酸盐降解为 (DNRA) 可以仅通过 (H2) 氧化来推动,正如新分离的细菌所证明的那样. 这一发现突显了性DNRA在环境和循环中的重要性.
科学领域:
- 微生物学 微生物学
- 生物地质化学生物地质化学
- 环境科学 环境科学
背景情况:
- 溶解性酸盐降解为 (DNRA) 是全球循环中的一个关键的微生物过程.
- 虽然经常被认为是有机性,但DNRA可以由无机电子捐赠者支持,包括分子 (H2).
- 依赖的DNRA的生理学仍然不完全理解.
研究的目的:
- 隔离和描述能够使用H2作为DNRA的唯一电子捐赠者的微生物.
- 阐明性DNRA背后的生理和分子机制.
- 评估性DNRA的生态分布和潜在意义.
主要方法:
- 用H2用于DNRA的微生物菌株的隔离和培养.
- 在批量和连续培养中进行生理实验,以评估DNRA率和静脉测量.
- 基因组和转录组分析以确定涉及性DNRA的关键酶.
- 超基因组调查以确定环境样本中性DNRA细菌的流行率.
主要成果:
- 有两种菌株,即阿里亚科巴克特 (Aliarcobacter butzleri) hDNRA1和硫 (Sulfurospirillum) sp. 这两种菌株. hDNRA2,被分离出来,并显示使用H2作为DNRA的唯一电子捐赠者来生长.
- DNRA严格依赖H2并与H2氧化结合,证实H2是电子源.
- 性DNRA在营养有限的条件下 (NO3-) 是可行的,证明了其生态潜力.
- 鉴定出1b组[NiFe]-酶和cytochrome c552酸盐减少酶是关键酶.
- 能够产生性DNRA的细菌在分类学上是多样化的,在各种生态系统中大量存在,特别是在深海热水喷口附近.
结论:
- H2可以作为DNRA的唯一,增长支持的电子捐赠者.
- 性DNRA被特定的基酶和酸盐还原酶催化.
- 这一过程在不同环境中的和循环中具有潜在的意义.
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