Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"genetic competence"”.
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Functional Characterization of the Streptococcus sanguinis com Regulon
… of the cardiac valves. S. sanguinis possesses genetic competence, the ability to acquire exogenous DNA into its genome. In the well characterized system of S. pneumoniae, genetic competence requires a quorum sensing system encoded by the early comCDE genes, as well as late genes controlled by …
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Regulation and production of extracellular signaling molecules in Bacillus subtilis
… subtilis uses cell-cell signals to control genetic competence, sporulation, degradative enzyme production and antibiotic synthesis. A family of peptide signals controls gene expression in B. subtilis by regulating transcription factors. I showed that the transcription of these peptide …
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Regulation of horizontal gene transfer by intercellular peptide signaling in Bacillus subtilis
… competitive advantage. Similarly, several mobile genetic elements possess mechanisms that regulate transfer. This regulation maintains stability and promotes dissemination of the element, thereby ensuring its survival. Elucidating the mechanisms that regulate transfer should provide insights into …
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Quorum Sensing and Virulence Regulation in Commensal and Pathogenic Bacteria
… that regulates collective behaviors including genetic competence, biofilm formation, virulence, and horizontal gene transfer. In streptococci, QS commonly occurs through the ComABCDE and ComRS signaling pathways, which coordinate transcriptional responses through competence-associated …
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The regulation of bacterial virulence by mucin glycans
… formation, quorum sensing, toxin production, and genetic competence. Next, we leveraged this knowledge to create glycan-bearing materials that selectively prevent Streptococcus mutans biofilm formation. Finally, we reproduce this workflow in a second niche, where we identify glycans that can …
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Effects of Quorum Quenchers on Aspergillus fumigatus Conidia Aggregation, Adhesion to Surfaces, and Biofilm Formation
… Microbial quorum sensing (QS) system regulates genetic competence and biofilm formation. Notwithstanding, triclosan, as a synthetic antimicrobial, disrupts QS signal in some bacteria, yeasts, and dermatophytes through blocking the biosynthesis of amino acid and fatty acids in the microbes. In …
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Characterisation of Streptococcus pneumoniae opacity phase variation
… upregulation of proteins and genes related to genetic competence in the O variants. However, mutagenesis of one such gene, encoding the competence stimulating peptide receptor (comD), did not alter opacity phenotype. There were also inconsistencies between genes identified as differentially …
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How did Listeria monocytogenes become pathogenic?
… been clearly resolved due to a scarcity of phylogenetically informative characters within the 16S and 23S rRNA molecules. The genus Listeria contains six species: L. monocytogenes, L. ivanovii, L. innocua, L. seeligeri, L. welshimeri, and L. grayi; of these, L. monocytogenes and L. ivanovii are …