NDLI: Novel Major Bacterial Candidate Division within a Municipal Anaerobic Sludge Digester

Content Provider	PubMed Central
Author	Chouari, Rakia Le, Paslier Denis Dauga, Catherine Patrick, Daegelen Weissenbach, Jean Sghir, Abdelghani
Copyright Year	2005
Abstract	In a previous study, we analyzed the molecular diversity of Planctomycetales by PCR amplification and sequencing of 16S rRNA clone libraries generated from a municipal wastewater plant, using planctomycete-specific and universal primer sets (R. Chouari, D. Le Paslier, P. Daegelen, P. Ginestet, J. Weissenbach, and A. Sghir, Appl. Environ. Microbiol. 69:7354-7363, 2003). Only a small fraction (4%) of the 16S rRNA gene sequences of the digester clone library corresponded to the Planctomycetales division. Importantly, 85.9% of the digester clone sequences are grouped into two different clusters named WWE1 (81.4% of the sequences) and WWE2 (4.5%) and are distantly affiliated with unidentified bacterial sequences retrieved from a methanogenic reactor community and from a termite gut, respectively. In phylogenetic analysis using 16S rRNA gene sequence representatives of the main phylogenetic bacterial divisions, the two clusters are monophyletic, branch apart from each other, and are distantly related to Planctomycetales and other bacterial divisions. A novel candidate division is proposed for WWE1, while the WWE2 cluster strongly affiliates with the recently proposed Lentisphearae phylum. We designed and validated a 16S rRNA probe targeting WWE1 16S rRNA sequences by both fluorescent in situ hybridization (FISH) and dot blot hybridization (DBH). Results of FISH analysis show that WWE1 representative microorganisms are rods or filamentous shaped, while DBH shows that WWE1 accounts for 12% of the total bacterial rRNA within the anaerobic digester. The remaining 16S rRNA gene sequences are affiliated with Verrucomicrobia or recently described candidate divisions with no known pure culture representatives, such as OD1, BRC1, or NBL-UPA2, making up less than 3.5% of the clone library, respectively. This inventory expands the known diversity of the latter bacterial division-level lineages.
Related Links	http://dx.doi.org/10.1128/aem.71.4.2145-2153.2005
Ending Page	2153
Page Count	9
Starting Page	2145
File Format	PDF
ISSN	00992240
e-ISSN	10985336
Journal	Applied and Environmental Microbiology
Issue Number	4
Volume Number	71
Language	English
Publisher	American Society for Microbiology
Publisher Date	2005-04-01
Access Restriction	Open
Rights Holder	American Society for Microbiology
Subject Keyword	Biotechnology Food Science Ecology Applied Microbiology and Biotechnology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Ecology Food Science Applied Microbiology and Biotechnology Biotechnology

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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