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Article: Metagenomic and Metatranscriptomic Analyses Reveal the Structure and Dynamics of a Dechlorinating Community Containing Dehalococcoides mccartyi and Corrinoid-Providing Microorganisms under Cobalamin-Limited Conditions

TitleMetagenomic and Metatranscriptomic Analyses Reveal the Structure and Dynamics of a Dechlorinating Community Containing Dehalococcoides mccartyi and Corrinoid-Providing Microorganisms under Cobalamin-Limited Conditions
Authors
KeywordsChloroflexi
Gene Expression Profiling
metagenomics
Microbial Consortia
Vitamin B 12
Issue Date2017
PublisherAmerican Society for Microbiology. The Journal's web site is located at http://aem.asm.org/
Citation
Applied and Environmental Microbiology, 2017, v. 83 n. 8, p. article no. e03508-16 How to Cite?
AbstractThe 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. IMPORTANCE The key chloroethene-dechlorinating bacterium Dehalococcoides mccartyi is a cobalamin auxotroph, thus acquiring corrinoids from other community members. Therefore, it is important to investigate the microbe-microbe interactions between Dehalococcoides and the corrinoid-providing microorganisms in a community. This study provides systems-level information, i.e., taxonomic and functional compositions and dynamics of the supportive microorganisms in dechlorinating communities under different cobalamin conditions. The findings shed light on the important roles of Veillonellaceae species in the communities compared to other coexisting community members in producing and providing corrinoids for Dehalococcoides species under cobalamin-limited conditions.
Persistent Identifierhttp://hdl.handle.net/10722/293150
ISSN
2023 Impact Factor: 3.9
2023 SCImago Journal Rankings: 1.016
PubMed Central ID
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorMen, Y-
dc.contributor.authorYu, K-
dc.contributor.authorBælum, J-
dc.contributor.authorGao, Y-
dc.contributor.authorTremblay, J-
dc.contributor.authorPrestat, E-
dc.contributor.authorStenuit, B-
dc.contributor.authorTringe, SG-
dc.contributor.authorJansson, J-
dc.contributor.authorZhang, T-
dc.contributor.authorAlvarez-Cohen, L-
dc.date.accessioned2020-11-23T08:12:32Z-
dc.date.available2020-11-23T08:12:32Z-
dc.date.issued2017-
dc.identifier.citationApplied and Environmental Microbiology, 2017, v. 83 n. 8, p. article no. e03508-16-
dc.identifier.issn0099-2240-
dc.identifier.urihttp://hdl.handle.net/10722/293150-
dc.description.abstractThe 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. IMPORTANCE The key chloroethene-dechlorinating bacterium Dehalococcoides mccartyi is a cobalamin auxotroph, thus acquiring corrinoids from other community members. Therefore, it is important to investigate the microbe-microbe interactions between Dehalococcoides and the corrinoid-providing microorganisms in a community. This study provides systems-level information, i.e., taxonomic and functional compositions and dynamics of the supportive microorganisms in dechlorinating communities under different cobalamin conditions. The findings shed light on the important roles of Veillonellaceae species in the communities compared to other coexisting community members in producing and providing corrinoids for Dehalococcoides species under cobalamin-limited conditions.-
dc.languageeng-
dc.publisherAmerican Society for Microbiology. The Journal's web site is located at http://aem.asm.org/-
dc.relation.ispartofApplied and Environmental Microbiology-
dc.rightsApplied and Environmental Microbiology. Copyright © American Society for Microbiology.-
dc.subjectChloroflexi-
dc.subjectGene Expression Profiling-
dc.subjectmetagenomics-
dc.subjectMicrobial Consortia-
dc.subjectVitamin B 12-
dc.titleMetagenomic and Metatranscriptomic Analyses Reveal the Structure and Dynamics of a Dechlorinating Community Containing Dehalococcoides mccartyi and Corrinoid-Providing Microorganisms under Cobalamin-Limited Conditions-
dc.typeArticle-
dc.identifier.emailZhang, T: zhangt@hkucc.hku.hk-
dc.identifier.authorityZhang, T=rp00211-
dc.description.naturelink_to_OA_fulltext-
dc.identifier.doi10.1128/aem.03508-16-
dc.identifier.pmid28188205-
dc.identifier.pmcidPMC5377501-
dc.identifier.scopuseid_2-s2.0-85016546285-
dc.identifier.hkuros319373-
dc.identifier.volume83-
dc.identifier.issue8-
dc.identifier.spagearticle no. e03508-
dc.identifier.epage16-
dc.identifier.isiWOS:000398771200021-
dc.publisher.placeUnited States-
dc.identifier.issnl0099-2240-

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