Apr 16, 2020

Comprehensive genome analyses of Sellimonas intestinalis, a potential biomarker of homeostasis gut recovery

BioRxiv : the Preprint Server for Biology
M. MunozDaniel Paredes-Sabja

Abstract

Sellimonas intestinalis is a Gram positive and anaerobic bacterial species previously considered as uncultivable. Although little is known about this Lachnospiraceae family member, its increased abundance has been reported in patients who recovered intestinal homeostasis after dysbiosis events. In this context, the aim of this work was taken advantage of a culturomics protocol that allowed the recovery species extremely oxygen-sensitive from faecal samples, which led to the establishment of an S. intestinalis isolate. Whole genome sequencing and taxonomic allocation confirmation were the base to develop comparative analyses including 11 public genomes closely related. Phylogeographic analysis revealed the existence of three lineages (linage-I including isolates from Chile and France, linage-II from South Korea and Finland, and linage-III from China and one isolate from USA). Pangenome analysis on the established dataset revealed that although S. intestinalis seems to have a highly conserved genome (with 50.1% of its coding potential being part of the coregenome), some recombination signals were evidenced. The identification of cluster of orthologous groups revealed a high number of genes involved in metabolism, including amino ...Continue Reading

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