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The core genome evolution of Lactobacillus crispatus as a driving force for niche competition in the human vaginal tract
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The core genome evolution of Lactobacillus crispatus as a driving force for niche competition in the human vaginal tract
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Journal Article
The core genome evolution of Lactobacillus crispatus as a driving force for niche competition in the human vaginal tract
2023
Overview
The lower female reproductive tract is notoriously dominated by Lactobacillus species, among which Lactobacillus crispatus emerges for its protective and health‐promoting activities. Although previous comparative genome analyses highlighted genetic and phenotypic diversity within the L. crispatus species, most studies have focused on the presence/absence of accessory genes. Here, we investigated the variation at the single nucleotide level within protein‐encoding genes shared across a human‐derived L. crispatus strain selection, which includes 200 currently available human‐derived L. crispatus genomes as well as 41 chromosome sequences of such taxon that have been decoded in the framework of this study. Such data clearly pointed out the presence of intra‐species micro‐diversities that could have evolutionary significance contributing to phenotypical diversification by affecting protein domains. Specifically, two single nucleotide variations in the type II pullulanase gene sequence led to specific amino acid substitutions, possibly explaining the substantial differences in the growth performances and competition abilities observed in a multi‐strain bioreactor culture simulating the vaginal environment. Accordingly, L. crispatus strains display different growth performances, suggesting that the colonisation and stable persistence in the female reproductive tract between the members of this taxon is highly variable. Within the lower female reproductive tract, Lactobacillus crispatus emerged for its protective and health‐promoting activities. The data presented here clearly pointed out the presence of intra‐species micro‐diversities that could have evolutionary significance contributing to phenotypical diversification by affecting protein domains.
Publisher
John Wiley & Sons, Inc,John Wiley and Sons Inc,Wiley
