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Inediibacterium massiliense gen. nov., sp. nov., a new bacterial species isolated from the gut microbiota of a severely malnourished infant

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Abstract

A novel strain, Mt12T (=CSUR P1907 = DSM 100590), was isolated from the fecal sample of a 7-month-old girl from Senegal afflicted with severe acute malnutrition. This bacterium is a strictly anaerobic, spore-forming Gram-stain positive bacillus. The major cellular fatty acid was identified as tetradecanoic acid. Its 16S rRNA gene sequence exhibited 94.9% similarity with that of Crassaminicella profunda strain Ra1766HT, currently the closest species with a validly published name. The draft genome of strain Mt12T is 3,497,275-bp long with a 30.45% of G+C content. 3397 genes were predicted, including 3268 protein-coding genes and 129 RNAs, including eight 16S rRNAs. Genomic comparison with closely related species with an available genome showed a lower quantitative genomic content. The phylogenetic analysis alongside the dDDH values under 30% and phenotypic characteristics suggest that strain Mt12T represents a new genus within the family Clostridiaceae, for which the name Inediibacterium massiliense gen. nov., sp. nov. is proposed.

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Abbreviations

AGIOS:

Average of genomic identity of orthologous gene sequences

bp:

Base pairs

COG:

Clusters of orthologous groups

CSUR:

Collection de souches de l’Unité des Rickettsies

DDH:

DNA–DNA hybridization

DSM:

Deutsche Sammlung von Mikroorganismen

FAME:

Fatty acid methyl ester

GC/MS:

Gas chromatography/mass spectrometry

kb:

Kilobases

MALDI-TOF MS:

Matrix-assisted laser-desorption/ionization time-of-flight mass spectrometry

ORF:

Open reading frame

TE buffer:

Tris-EDTA buffer

SDS:

Sodium dodecyl sulfate

URMITE:

Unité de Recherche sur les Maladies Infectieuses et Tropicales Emergent

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Acknowledgements

The authors thank the Xegen Company (www.xegen.fr) for automating the genomic annotation process. This study was funded by the “Fondation Méditerranée Infection”. We thank TradOnline for English reviewing.

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Correspondence to Pierre-Edouard Fournier.

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Supplementary Fig. 1

Gram staining of Inediibacterium massiliense strain Mt12T (TIFF 4273 kb)

Supplementary Table 1 (DOCX 12 kb)

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Alou, M.T., Rathored, J., Michelle, C. et al. Inediibacterium massiliense gen. nov., sp. nov., a new bacterial species isolated from the gut microbiota of a severely malnourished infant. Antonie van Leeuwenhoek 110, 737–750 (2017). https://doi.org/10.1007/s10482-017-0843-5

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