• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The ISME journal emultidisciplinary journal of microbial ecology >Comparative genomics sheds light on niche differentiation and the evolutionary history of comammox Nitrospira
【24h】

Comparative genomics sheds light on niche differentiation and the evolutionary history of comammox Nitrospira

机译：比较基因组学揭示了利基分化和Commomx Nitrospira的进化史

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The description of comammox Nitrospira spp., performing complete ammonia-to-nitrate oxidation, and their co-occurrence with canonical beta-proteobacterial ammonia oxidizing bacteria (beta-AOB) in the environment, calls into question the metabolic potential of comammox Nitrospira and the evolutionary history of their ammonia oxidation pathway. We report four new comammox Nitrospira genomes, constituting two novel species, and the first comparative genomic analysis on comammox Nitrospira. Unlike canonical Nitrospira, comammox Nitrospira genomes lack genes for assimilatory nitrite reduction, suggesting that they have lost the potential to use external nitrite nitrogen sources. By contrast, compared to canonical Nitrospira, comammox Nitrospira harbor a higher diversity of urea transporters and copper homeostasis genes and lack cyanate hydratase genes. Additionally, the two comammox clades differ in their ammonium uptake systems. Contrary to beta-AOB, comammox Nitrospira genomes have single copies of the two central ammonia oxidation pathway operons. Similar to ammonia oxidizing archaea and some oligotrophic AOB strains, they lack genes involved in nitric oxide reduction. Furthermore, comammox Nitrospira genomes encode genes that might allow efficient growth at low oxygen concentrations. Regarding the evolutionary history of comammox Nitrospira, our analyses indicate that several genes belonging to the ammonia oxidation pathway could have been laterally transferred from beta-AOB to comammox Nitrospira. We postulate that the absence of comammox genes in other sublineage II Nitrospira genomes is the result of subsequent loss.
机译：Commomox Nitrospira SPP的描述，进行完全氨 - 硝酸盐氧化，及其在环境中氧化细菌（Beta-Aob）的氧化细菌（Beta-Aob），调查Commamx Nitrospira的代谢潜力和氨氧化途径的进化史。我们报告了四种新的Commammox Nitrospira基因组，构成了两种新种类，以及对Commomx Nitrospira的第一个比较基因组分析。与规范尼硝基菌不同，Commamx氮血清基因组缺乏用于减少同化亚硝酸盐的基因，表明它们失去了使用外部亚硝酸盐氮源的可能性。相比之下，与典型氮虫，Commamx Nitrospira患有更高的尿素转运蛋白和铜稳态基因的多样性，并且缺乏氰酸酯水溶酶基因。另外，两种Commammox含有其铵的摄取系统不同。与β-AOB相反，commammox nitrospira基因组有两个中央氨氧化途径的单一拷贝。与氨氧化古物和一些寡营养的AOB菌株类似，它们缺乏参与一氧化氮的基因。此外，Commomx Nitrospira Genomes编码可能在低氧浓度下有效生长的基因。关于Commomox Nitrospira的进化史，我们的分析表明，属于氨氧化途径的几个基因可以从β-Aob横向转移到Commamx Nitrospira。我们假设在其他Sublineage II nitrospira基因组中没有Commamx基因是随后损失的结果。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号