12个anammox细菌属的核心anammox氧化还原反应系统及其演化和应用含义
Pengfei Hu1, Mark van Loosdrecht2, Ji-Dong Gu3
1Environmental Science and Engineering Research Group, Guangdong Technion-Israel Institute of Technology, 241 Daxue Road, Shantou, Guangdong 515063, PR China; Civil and Environmental Engineering, Technion - Israel Institute of Technology, Haifa 320003, Israel.
Water research
|April 5, 2025
概括
无氧氨氧化 (anammox) 细菌进化了复杂的电子转移系统,适应不断变化的环境化物水平. 这些由地质事件驱动的适应是了解anammox功能和废水处理应用的关键.
科学领域:
- 微生物生态学与进化
- 生物化学和分子生物学
- 环境微生物学 环境微生物学
背景情况:
- 无氧氨氧化 (anammox) 是一种由膜电子转化驱动的关键氧化还原过程.
- 精确的电子转移机制和anammox反应的进化历史仍然不完全理解.
- 亚纳莫克斯细菌在循环中起着重要作用,并用于废水处理.
研究的目的:
- 为了研究电子转移在anammox细菌的进化起源和机制.
- 分析anammox氧化回氧系统在应对重大地质事件,如大氧化事件 (GOE) 和新新生态氧化事件 (NOE) 的适应.
- 确定影响废水处理系统 (WWTPs) 中的anammox细菌丰富性的核心基因转录活动.
主要方法:
- 对来自12个属的64个anammox细菌基因组进行比较基因组分析.
- 检查参与anammox反应的酶和电子载体蛋白质.
- 在两个全面的WWTP中分析核心基因转录活动.
主要成果:
- 亚纳莫克斯酶共享保存的催化模式,但电子穿蛋白在各个谱系之间存在显著差异.
- 早期分支的阿纳莫克斯细菌具有更简单的电子穿系统,而后期分支的细菌群体表现出复杂的结构.
- 亚酸还原酶 (NIR),细胞染色体c复合体 (NaxL/NaxS) 和亚酸氧还原酶 (NxrC/NxrT) 的进化招募与GOE和NOE后的亚酸可用性增加有关.
- 在WWTP中核心基因转录与布罗卡地亚科家族的丰富性和特定的环境因素相关.
结论:
- 该研究阐明了anammox电子转移系统的动态演变,由主要的地质和氧化事件形成.
- 了解这些进化途径,可以深入了解anammox细菌的功能适应.
- 这些发现为优化基于anammox的废水处理过程提供了潜在的策略.
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