Effect of waaL ligase gene deletion on motility and stress adaptation reactions of Y. enterocolitica 6471/76

Shevchenko, J. I.; Shilina, J. V.; Позур, В. К.; Skurnik, Mikael

doi:10.3103/s0095452715060092

Cited by 1 publication

(1 citation statement)

References 19 publications

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“…Several SNVs in the genes waaL and wcaJ were observed under both mono‐culture and co‐culture conditions, with no obvious differences in selection pressure observed (Figure 3). The non‐essential WaaL transfers O‐antigen, a lipopolysaccharide found in the outer membrane of Gram‐negative bacteria, from its carrier lipid to the lipid A‐core oligosaccharide (Abeyrathne et al, 2005; Pei et al, 2015; Pérez et al, 2008; Shevchenko et al, 2015). WcaJ is predicted to initiate the biosynthesis of colanic acid, an exopolysaccharide that forms a capsule around the cell surface to protect the cell under stressful conditions and also assists in the formation of biofilms (Hanna et al, 2003).…”

Section: Discussionmentioning

confidence: 99%

The impact of interspecific competition on the genomic evolution of Phaeobacter inhibens and Pseudoalteromonas tunicata during biofilm growth

Song,

Zhang,

Majzoub

et al. 2023

Environmental Microbiology

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Interspecific interactions in biofilms have been shown to cause the emergence of community‐level properties. To understand the impact of interspecific competition on evolution, we deep‐sequenced the dispersal population of mono‐ and co‐culture biofilms of two antagonistic marine bacteria (Phaeobacter inhibens 2.10 and Pseudoalteromononas tunicata D2). Enhanced phenotypic and genomic diversification was observed in the P. tunicata D2 populations under both mono‐ and co‐culture biofilms in comparison to P. inhibens 2.10. The genetic variation was exclusively due to single nucleotide variants and small deletions, and showed high variability between replicates, indicating their random emergence. Interspecific competition exerted an apparent strong positive selection on a subset of P. inhibens 2.10 genes (e.g., luxR, cobC, argH, and sinR) that could facilitate competition, while the P. tunicata D2 population was genetically constrained under competition conditions. In the absence of interspecific competition, the P. tunicata D2 replicate populations displayed high levels of mutations affecting the same genes involved in cell motility and biofilm formation. Our results show that interspecific biofilm competition has a complex impact on genomic diversification, which likely depends on the nature of the competing strains and their ability to generate genetic variants due to their genomic constraints.

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