| DOI | Resolve DOI: https://doi.org/10.1128/AEM.03508-16 |
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| Author | Search for: Men, Yujie; Search for: Yu, Ke; Search for: Bælum, Jacob; Search for: Gao, Ying; Search for: Tremblay, Julien1; Search for: Prestat, Emmanuel; Search for: Stenuit, Ben; Search for: Tringe, Susannah G.; Search for: Jansson, Janet; Search for: Zhang, Tong; Search for: Alvarez-Cohen, Lisa |
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| Editor | Search for: Liu, Shuang-Jiang |
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| Affiliation | - National Research Council of Canada. Energy, Mining and Environment
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| Format | Text, Article |
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| Abstract | The aim of this study is to obtain a systems-level understanding of the interactions between Dehalococcoides and corrinoid-supplying microorganisms by analyzing community structures and functional compositions, activities, and dynamics in trichloroethene (TCE)-dechlorinating enrichments. Metagenomes and metatranscriptomes of the dechlorinating enrichments with and without exogenous cobalamin were compared. Seven putative draft genomes were binned from the metagenomes. At an early stage (2 days), more transcripts of genes in the Veillonellaceae bin-genome were detected in the metatranscriptome of the enrichment without exogenous cobalamin than in the one with the addition of cobalamin. Among these genes, sporulation-related genes exhibited the highest differential expression when cobalamin was not added, suggesting a possible release route of corrinoids from corrinoid producers. Other differentially expressed genes include those involved in energy conservation and nutrient transport (including cobalt transport). The most highly expressed corrinoid de novo biosynthesis pathway was also assigned to the Veillonellaceae bin-genome. Targeted quantitative PCR (qPCR) analyses confirmed higher transcript abundances of those corrinoid biosynthesis genes in the enrichment without exogenous cobalamin than in the enrichment with cobalamin. Furthermore, the corrinoid salvaging and modification pathway of Dehalococcoides was upregulated in response to the cobalamin stress. This study provides important insights into the microbial interactions and roles played by members of dechlorinating communities under cobalamin-limited conditions. |
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| Publication date | 2017-04-15 |
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| Publisher | American Society for Microbiology |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 23003200 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 4b3c389a-6f3e-437f-8d92-5dc68d853860 |
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| Record created | 2018-05-07 |
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| Record modified | 2020-03-16 |
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