Low genome content diversity of marine planktonic Thaumarchaeota
Publication in refereed journal

香港中文大學研究人員
替代計量分析
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其它資訊
摘要Members of Thaumarchaeota are responsible for much of the ammonia oxidation occurring in the ocean. Recent studies showed that marine Thaumarchaeota have versatile metabolic capabilities, but sequencing additional genomes has not significantly increased the gene content ascribed to this group. We used the assembly-free dN pipeline software in combination with phylogenetic analyses to interrogate shotgun metagenomic data sets to gain a better understanding of the genomic diversity of Thaumarchaeota populations. The program confidently assigned ∼3,000 paired-end reads to Thaumarchaeota, independent of homologies to any known Thaumarchaeota genome sequence. Only 2% of these reads potentially harbor new genes that were absent from the genome of ‘Candidatus Nitrosopumilus maritimus’ str. SCM1, even though this strain was isolated from a marine aquarium rather than directly from the ocean. One of these novel genes encode proteins associated with the CRISPR/Cas system, Cas1, suggesting that phage defense through CRISPR may be also present in planktonic Thaumarchaeota lineages. Our results suggest that marine Thaumarchaeota populations have very low diversity in genome content, which is corroborated using computer simulation analyses of two bacterial lineages with known genome content diversity.
著者Luo H., Sun Y., Hollibaugh J.T., Moran M.A.
期刊名稱Environmental Microbiology Reports
出版年份2016
月份8
日期1
卷號8
期次4
出版社Wiley-Blackwell
出版地United States
頁次501 - 507
國際標準期刊號1758-2229
語言英式英語

上次更新時間 2021-19-02 於 00:45