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Staphylococcus xylosus strain:MH_18 | isolate:Chicken

ABSTRACT: Staphylococcus xylosus strain:MH_18 | isolate:Chicken Genome sequencing

PROVIDER: PRJNA1109637 | ENA |

REPOSITORIES: ENA

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Global transcriptome response of Staphylococcus xylosus in meat model

Project description:Staphylococcus xylosus is used as starter culture for sausage fermentation for a long time but the molecular mechanisms for its adaptation in meat remained unknown. A global transcriptomic approach was carried out to determine these molecular mechanisms. S. xylosus modulated the expression of about 30% of the total genes during its growth and survival in the meat model. The expression of many genes encoding enzymes involved in glucose and lactate catabolism was up regulated. In parallel, genes encoding transport of peptides and peptidases that could furnish amino acids were up expressed and thus concomitantly a lot of genes involved in amino acids synthesis were down regulated. Finally S. xylosus responded to salt added in the meat model by over expressing genes involved in transport and synthesis of osmoprotectants, Na+ and H+ extrusion and in production of energy through the F0F1-ATPase. Microarray was used to evaluate modification in the transcriptome of S. xylosus C2a strain in the inoculum (Mx) or in meat (V). Three biological replicates were collected on separate days for samples and labelled following a dye-switch design; for each condition one labeling in Cy3 and one in Cy5.

2016-01-04 | E-GEOD-69743 | biostudies-arrayexpress

Global transcriptome response of Staphylococcus xylosus in meat model

2016-01-04 | GSE69743 | GEO

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Characterization of biofilm associated protein (Bap) in Staphylococcus xylosus

Project description:The biofilm associated protein (Bap) is recognised as the essential component for biofilm formation in Staphylococcus aureus V329 and other species. Although Bap orthologs are also present in most S. xylosus strains, their contribution to biofilm formation has not yet been determined. In this study, different experimental approaches were used to elucidate the effect of Bap on biofilm formation in S. xylosus and the motif structure of two biofilm-forming S. xylosus strains TMW 2.1023 and TMW 2.1523 was compared to Bap of S. aureus V329. We found that despite an identical structural arrangement into four regions, Bap from S. xylosus differs in key factors to Bap of S. aureus i.e. isoelectric point of aggregation prone Region B, protein homology and type of repeats. Disruption of bap had no effect on aggregation behavior of selected S. xylosus strains and a significant reduction in biofilm was only observed for one strain (TMW 2.1523) under neutral conditions. Further we could not observe any typical characteristics of a S. aureus Bap positive phenotype such as functional impairment by calcium addition and rough colony morphology on CRA. A predominant role of Bap in cell aggregation and biofilm formation as reported for S. aureus V329 was not observed. We therefore suggest that biofilm formation follows different, multifactorial mechanisms, and cannot be referred to as the primary function of Bap in S. xylosus.

2022-01-20 | PXD029728 | Pride

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