Bacterial niche-specific genome expansion is coupled with highly frequent gene disruptions in deep-sea sediments.
The complexity and dynamics of microbial metagenomes may be evaluated by genome size, gene duplication and the disruption rate between lineages. In this study, we pyrosequenced the metagenomes of microbes obtained from the brine and sediment of a deep-sea brine pool in the Red Sea to explore the pos...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2011-01-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC3244439?pdf=render |
| _version_ | 1818562257755308032 |
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| author | Yong Wang Jiang Ke Yang On On Lee Tie Gang Li Abdulaziz Al-Suwailem Antoine Danchin Pei-Yuan Qian |
| author_facet | Yong Wang Jiang Ke Yang On On Lee Tie Gang Li Abdulaziz Al-Suwailem Antoine Danchin Pei-Yuan Qian |
| author_sort | Yong Wang |
| collection | DOAJ |
| description | The complexity and dynamics of microbial metagenomes may be evaluated by genome size, gene duplication and the disruption rate between lineages. In this study, we pyrosequenced the metagenomes of microbes obtained from the brine and sediment of a deep-sea brine pool in the Red Sea to explore the possible genomic adaptations of the microbes in response to environmental changes. The microbes from the brine and sediments (both surface and deep layers) of the Atlantis II Deep brine pool had similar communities whereas the effective genome size varied from 7.4 Mb in the brine to more than 9 Mb in the sediment. This genome expansion in the sediment samples was due to gene duplication as evidenced by enrichment of the homologs. The duplicated genes were highly disrupted, on average by 47.6% and 70% for the surface and deep layers of the Atlantis II Deep sediment samples, respectively. The disruptive effects appeared to be mainly due to point mutations and frameshifts. In contrast, the homologs from the Atlantis II Deep brine sample were highly conserved and they maintained relatively small copy numbers. Likely, the adaptation of the microbes in the sediments was coupled with pseudogenizations and possibly functional diversifications of the paralogs in the expanded genomes. The maintenance of the pseudogenes in the large genomes is discussed. |
| first_indexed | 2024-12-14T01:01:20Z |
| format | Article |
| id | doaj.art-050a55827d4c444b8b3ba3ac1c78272f |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-14T01:01:20Z |
| publishDate | 2011-01-01 |
| publisher | Public Library of Science (PLoS) |
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| spelling | doaj.art-050a55827d4c444b8b3ba3ac1c78272f2022-12-21T23:23:13ZengPublic Library of Science (PLoS)PLoS ONE1932-62032011-01-01612e2914910.1371/journal.pone.0029149Bacterial niche-specific genome expansion is coupled with highly frequent gene disruptions in deep-sea sediments.Yong WangJiang Ke YangOn On LeeTie Gang LiAbdulaziz Al-SuwailemAntoine DanchinPei-Yuan QianThe complexity and dynamics of microbial metagenomes may be evaluated by genome size, gene duplication and the disruption rate between lineages. In this study, we pyrosequenced the metagenomes of microbes obtained from the brine and sediment of a deep-sea brine pool in the Red Sea to explore the possible genomic adaptations of the microbes in response to environmental changes. The microbes from the brine and sediments (both surface and deep layers) of the Atlantis II Deep brine pool had similar communities whereas the effective genome size varied from 7.4 Mb in the brine to more than 9 Mb in the sediment. This genome expansion in the sediment samples was due to gene duplication as evidenced by enrichment of the homologs. The duplicated genes were highly disrupted, on average by 47.6% and 70% for the surface and deep layers of the Atlantis II Deep sediment samples, respectively. The disruptive effects appeared to be mainly due to point mutations and frameshifts. In contrast, the homologs from the Atlantis II Deep brine sample were highly conserved and they maintained relatively small copy numbers. Likely, the adaptation of the microbes in the sediments was coupled with pseudogenizations and possibly functional diversifications of the paralogs in the expanded genomes. The maintenance of the pseudogenes in the large genomes is discussed.http://europepmc.org/articles/PMC3244439?pdf=render |
| spellingShingle | Yong Wang Jiang Ke Yang On On Lee Tie Gang Li Abdulaziz Al-Suwailem Antoine Danchin Pei-Yuan Qian Bacterial niche-specific genome expansion is coupled with highly frequent gene disruptions in deep-sea sediments. PLoS ONE |
| title | Bacterial niche-specific genome expansion is coupled with highly frequent gene disruptions in deep-sea sediments. |
| title_full | Bacterial niche-specific genome expansion is coupled with highly frequent gene disruptions in deep-sea sediments. |
| title_fullStr | Bacterial niche-specific genome expansion is coupled with highly frequent gene disruptions in deep-sea sediments. |
| title_full_unstemmed | Bacterial niche-specific genome expansion is coupled with highly frequent gene disruptions in deep-sea sediments. |
| title_short | Bacterial niche-specific genome expansion is coupled with highly frequent gene disruptions in deep-sea sediments. |
| title_sort | bacterial niche specific genome expansion is coupled with highly frequent gene disruptions in deep sea sediments |
| url | http://europepmc.org/articles/PMC3244439?pdf=render |
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