Genomic Insights into Niche Partitioning across Sediment Depth among Anaerobic Methane-Oxidizing Archaea in Global Methane Seeps | |
Chen, Jiawei1,4,5; Li, Yingdong1,4,5; Zhong, Cheng1,4,5; Xu, Zhimeng1,4,5; Lu, Guangyuan2,5; Jing, Hongmei3; Liu, Hongbin1,4,5 | |
刊名 | MSYSTEMS |
2023-03 | |
卷号 | 1页码:1 |
关键词 | ANME archaea AOM niche partitioning methane seep metagenome-assembled genome |
通讯作者 | Liu, Hongbin |
文献子类 | 期刊论文 |
英文摘要 | Marine sediments are important methane reservoirs. Methane efflux from the seabed is significantly restricted by anaerobic methanotrophic (ANME) archaea through a process known as anaerobic oxidation of methane (AOM). Different clades of ANME archaea occupy distinct niches in methane seeps, but their underlying molecular mechanisms still need to be fully understood. To provide genetic explanations for the niche partitioning of ANME archaea, we applied comparative genomic analysis to ANME archaeal genomes retrieved from global methane seeps. Our results showed that ANME-2 archaea are more prevalent than ANME-1 archaea in shallow sediments because they carry genes that encode a significantly higher number of outer membrane multiheme c-type cytochromes and flagellar proteins. These features make ANME-2 archaea perform direct interspecies electron transfer better and benefit more from electron acceptors in AOM. Besides, ANME-2 archaea carry genes that encode extra peroxidase compared to ANME-1 archaea, which may lead to ANME-2 archaea better tolerating oxygen toxicity. In contrast, ANME-1 archaea are more competitive in deep layers than ANME-2 archaea because they carry extra genes (mtb and mtt) for methylotrophic methanogenesis and a significantly higher number of frh and mvh genes for hydrogenotrophic methanogenesis. Additionally, ANME-1 archaea carry exclusive genes (sqr, TST, and mddA) involved in sulfide detoxification compared to ANME-2 archaea, leading to stronger sulfide tolerance. Overall, this study reveals the genomic mechanisms shaping the niche partitioning among ANME archaea in global methane seeps.IMPORTANCE Anaerobic methanotrophic (ANME) archaea are important methanotrophs in marine sediment, controlling the flux of biologically generated methane, which plays an essential role in the marine carbon cycle and climate change. So far, no strain of this lineage has been isolated in pure culture, which makes metagenomics one of the fundamental approaches to reveal their metabolic potential. Although the niche partitioning of ANME archaea was frequently reported in different studies, whether this pattern was consistent in global methane seeps had yet to be verified, and little was known about the genetic mechanisms underlying it. Here, we reviewed and analyzed the community structure of ANME archaea in global methane seeps and indicated that the niche partitioning of ANME archaea was statistically supported. Our comparative genomic analysis indicated that the capabilities of interspecies electron transfer, methanogenesis, and the resistance of oxygen and hydrogen sulfide could be critical in defining the distribution of ANME archaea in methane seep sediment. Anaerobic methanotrophic (ANME) archaea are important methanotrophs in marine sediment, controlling the flux of biologically generated methane, which plays an essential role in the marine carbon cycle and climate change. So far, no strain of this lineage has been isolated in pure culture, which makes metagenomics one of the fundamental approaches to reveal their metabolic potential. |
WOS研究方向 | Microbiology |
语种 | 英语 |
WOS记录号 | WOS:000949227600001 |
内容类型 | 期刊论文 |
版本 | 出版稿 |
源URL | [http://ir.idsse.ac.cn/handle/183446/10166] |
专题 | 深海科学研究部_深海生物学研究室_海洋微生物分子生态学研究组 |
通讯作者 | Liu, Hongbin |
作者单位 | 1.Hong Kong Univ Sci & Technol, Hong Kong Branch, Southern Marine Sci & Engn Guangdong Lab Guangzhou, Hong Kong, Peoples R China; 2.City Univ Hong Kong, Res Ctr Oceans & Human Hlth, Shenzhen Res Inst, Shenzhen, Peoples R China 3.Chinese Acad Sci, Inst Deep Sea Sci & Engn, CAS Key Lab Expt Study Deep Sea Extreme Condit, Sanya, Peoples R China; 4.Hong Kong Univ Sci & Technol, Dept Ocean Sci, Hong Kong, Peoples R China; 5.Southern Marine Sci & Engn Guangdong Lab Guangzhou, Guangzhou, Peoples R China; |
推荐引用方式 GB/T 7714 | Chen, Jiawei,Li, Yingdong,Zhong, Cheng,et al. Genomic Insights into Niche Partitioning across Sediment Depth among Anaerobic Methane-Oxidizing Archaea in Global Methane Seeps[J]. MSYSTEMS,2023,1:1. |
APA | Chen, Jiawei.,Li, Yingdong.,Zhong, Cheng.,Xu, Zhimeng.,Lu, Guangyuan.,...&Liu, Hongbin.(2023).Genomic Insights into Niche Partitioning across Sediment Depth among Anaerobic Methane-Oxidizing Archaea in Global Methane Seeps.MSYSTEMS,1,1. |
MLA | Chen, Jiawei,et al."Genomic Insights into Niche Partitioning across Sediment Depth among Anaerobic Methane-Oxidizing Archaea in Global Methane Seeps".MSYSTEMS 1(2023):1. |
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