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在海洋中微生物介导的有机化物化和脱化循环
Na Zhou1, Qihao Li1, Zhiwei Liang1
1Environmental Microbiomics Research Center, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, China.
海洋微生物驱动有机化物循环,对全球生物地质化学至关重要. 这项研究在全球范围内绘制了这些微生物及其基因的地图,揭示了新的多样性和独特的海洋脱模式.
科学领域:
- 环境微生物学 环境微生物学
- 生物地质化学生物地质化学
- 基因组学就是基因组学.
背景情况:
- 微生物有机化物循环显著影响海洋生态化学循环和气候.
- 参与这些过程的微生物的全球分布和多样性在很大程度上是未知的.
研究的目的:
- 构建一个全面的数据库 (HaloCycDB) 的有机化物循环基因.
- 探索海洋微生物和参与化和脱的基因的全球地图.
- 描述这些微生物群落的多样性和分布.
主要方法:
- 构建了有机化物循环基因数据库 (HaloCycDB).
- 对1473个海洋元基因组和15252个元基因组组装基因组 (MAG) 的分析.
- 微生物培养,蛋白质结构预测和分子对接的整合.
主要成果:
- 6204个MAG携带有机化物循环基因,其中84.30%是脱种群.
- 伪虫在化和脱化中广泛存在,并且在化和脱化中占主导地位.
- 80.91%的减少性脱酶 (RDase) 基因和91.35%的含有RDase的核细胞属于未表征的血统,扩大已知的脱酶多样性.
- 确定了四种独特的海洋"微生物-RDase-organohalide"模式,与陆地模式不同,与碳/硫循环有关.
结论:
- 这项研究提供了第一个海洋有机化物循环微生物和基因的全球地图.
- 这些发现揭示了海洋脱路径的大量未知的多样性.
- 独特的海洋脱模式及其生物地化学合提供了对海洋过程的新见解.
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