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      Genome sequence and description of Blautia brookingsii SG772 sp. nov., a novel bacterial species isolated from human faeces

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          Abstract

          An anaerobic isolate SG772 belonging to the genus Blautia was isolated from a healthy human faecal sample. When compared using 16s rRNA sequence identity, SG772 showed only 94.46% similarity with its neighbour species Blautia stercoris. As strain SG772 showed both phenotypic and genomic differences from other members of the type species within the genus Blautia, we propose the designation of SG772 as novel species ‘ Blautia brookingsii SG772 T’.

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          Enterotypes in the landscape of gut microbial community composition

          Paul Costea, Falk Hildebrand, Arumugam Manimozhiyan … (2018)
          Population stratification is a useful approach towards a better understanding of complex biological problems in human health and well-being. The proposal that such stratification applies to the human gut microbiome, in the form of distinct community composition types, termed “enterotypes”, was met with both excitement and controversy. In view of accumulated data and re-analyses since the original work, we revisit the enterotype concept, discuss different methods of dividing up the landscape of possible microbiome configurations, and put these concepts into a functional, ecological and medical context. As enterotypes are of use in describing the gut microbial community landscape and may become relevant in clinical practice, we aim to reconcile differing views and encourage a balanced application of the concept.
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            A polyphasic strategy incorporating genomic data for the taxonomic description of novel bacterial species.

            Dhamodharan Ramasamy, Ajay Kumar Mishra, Jean-Christophe Lagier … (2014)
            Currently, bacterial taxonomy relies on a polyphasic approach based on the combination of phenotypic and genotypic characteristics. However, the current situation is paradoxical in that the genetic criteria that are used, including DNA-DNA hybridization, 16S rRNA gene sequence nucleotide similarity and phylogeny, and DNA G+C content, have significant limitations, but genome sequences that contain the whole genetic information of bacterial strains are not used for taxonomic purposes, despite the decreasing costs of sequencing and the increasing number of available genomes. Recently, we diversified bacterial culture conditions with the aim of isolating uncultivated bacteria. To classify the putative novel species that we cultivated, we used a polyphasic strategy that included phenotypic as well as genomic criteria (genome characteristics as well as genomic sequence similarity). Herein, we review the pros and cons of genome sequencing for taxonomy and propose that the incorporation of genome sequences in taxonomic studies has the advantage of using reliable and reproducible data. This strategy, which we name taxono-genomics, may contribute to the taxonomic classification of bacteria.
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              Reclassification of Clostridium coccoides, Ruminococcus hansenii, Ruminococcus hydrogenotrophicus, Ruminococcus luti, Ruminococcus productus and Ruminococcus schinkii as Blautia coccoides gen. nov., comb. nov., Blautia hansenii comb. nov., Blautia hydrogenotrophica comb. nov., Blautia luti comb. nov., Blautia producta comb. nov., Blautia schinkii comb. nov. and description of Blautia wexlerae sp. nov., isolated from human faeces.

              Chengxu Liu, Sydney M. Finegold, Yuli Song … (2008)
              Phenotypic and phylogenetic studies were performed on 15 isolates of an unidentified Gram-positive, anaerobic, non-sporulating coccobacillus-shaped bacterium isolated from human faeces. The novel organisms were catalase-negative, indole-negative and produced acetate and succinate as end products of metabolism. Comparative 16S rRNA gene sequencing demonstrated that the 15 isolates were highly related to each other and formed a hitherto unknown subline within the clostridial rRNA cluster XIVa. The novel isolates formed a robust phylogenetic group with a number of organisms which included Clostridium coccoides, Ruminococcus luti, Ruminococcus obeum and a number of other misclassified ruminococci. On the basis of these studies, a novel genus, Blautia gen. nov., is proposed. It is suggested that Clostridium coccoides, Ruminococcus hansenii, Ruminococcus hydrogenotrophicus, Ruminococcus luti, Ruminococcus productus, and Ruminococcus schinkii are transferred to this genus as Blautia coccoides gen. nov., comb. nov., Blautia hansenii comb. nov., Blautia hydrogenotrophica comb. nov., Blautia luti comb. nov., Blautia producta comb. nov. and Blautia schinkii comb. nov. One of the new isolates, the hitherto unknown coccus-shaped bacterial strain WAL 14507T (=ATCC BAA-1564T=DSM 19850T) is proposed as representing the type strain of a novel species, Blautia wexlerae sp. nov.
              Article 0 comments Cited 135 times – based on 0 reviews     Review now
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                Author and article information

                Contributors
                J. Scaria
                Journal
                Journal ID (nlm-ta): New Microbes New Infect
                Journal ID (iso-abbrev): New Microbes New Infect
                Title: New Microbes and New Infections
                Publisher: Elsevier
                ISSN (Electronic): 2052-2975
                Publication date PMC-release: 07 January 2020
                Publication date Collection: March 2020
                Publication date (Electronic): 07 January 2020
                Volume: 34
                Electronic Location Identifier: 100648
                Affiliations
                [1]Department of Veterinary & Biomedical Sciences, South Dakota State University, Brookings, SD, USA
                Author notes
                [∗ ] Corresponding author: J. Scaria, Department of Veterinary & Biomedical Sciences, South Dakota State University, Brookings, SD 57007, USA. joy.scaria@ 123456sdstate.edu
                Article
                Publisher ID: S2052-2975(19)30145-3 Publisher ID: 100648
                DOI: 10.1016/j.nmni.2019.100648
                PMC ID: 7005547
                SO-VID: da1e496a-c4e5-4f50-b240-9415d98947d8
                Copyright © © 2020 The Author(s)
                License:

                This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

                History
                Date received : 26 June 2019
                Date revision received : 2 December 2019
                Date accepted : 27 December 2019
                Categories
                Subject: Taxonogenomics: Genome of a New Organism

                Keywords: blautia brookingsii sg772t,culturomics,gut microbiota,new species,taxogenomics
                Data availability:
                Keywords: blautia brookingsii sg772t, culturomics, gut microbiota, new species, taxogenomics

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