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 9 of 9 for “"SIGB"”.
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Experiència de migració a Koha : Informe del procés d'implementació del SIGB Koha a la biblioteca de la Universidade Portucalense
… del sistema integrat gestor de biblioteques (SIGB) Koha amb la corresponent migració de registres bibliogràfics en una biblioteca universitària. S'hi tracten els problemes amb què s'ha topat i les solucions adoptades.
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Molecular investigation of the influence of environmental factors and subinhibitory antibiotic concentrations on the biofilm formation in Staphylococcus epidermidis
… as well as in B. subtilis. For this purpose, a sigB knockout mutant had been constructed in a biofilm-forming S. aureus. This mutant showed a markedly decrease of the ica transcription and biofilm-production, whereas a complement strain carrying the sigB gene on an expression vector completely …
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CONTRIBUTIONS OF SIGMA-B AND PRFA TO STRESS RESPONSE AND VIRULENCE GENE EXPRESSION IN LISTERIA MONOCYTOGENES
… of lmo1433 (delta-lmo1433), as well as a delta-sigB delta-lmo1433 strain, showed no difference in the strains' abilities to survive oxidative stress when compared to their respective parent strains, although presence of an intact sigB allele was important for survival. Likewise, the …
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Epidemiologische und molekulare Untersuchungen zur Biofilmbildung in Staphylococcus epidermidis und Staphylococcus aureus
… einhergingen. Die Nukleotidsequenzierung des sigB-Systems ergab in den Varianten mehrere Punktmutationen in den SigB-Regulatorgenen rsbU und rsbW. Dies legt nahe, daß der SigB-Genlokus einer starken genetischen Variabilität unterliegt, die wiederum pleiotrope Effekte auf die Genexpression in …
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Investigation of molecular mechanisms of biofilm formation by <i>Listeria monocytogenes</i>
… rsbU and rmlA. RsbU is the upstream regulator of SigB, a sigma factor. Either ΔrsbU or ΔsigB mutant strains had an ‘enhanced’ profile of biofilm formation. On the other hand, removing RmlA, which is the first enzyme for TDP-L-rhamnose biosynthesis, displayed a reduction in the amount of biofilm …
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Investigating the Prevalence, Persistence, and Diversity of Listeria monocytogenes and Listeria species in Produce Packinghouses
… Species and allelic type (AT) were identified by sigB sequencing. Among the 1,584 samples tested, 3.2%, 2.7%, and 0.6% of the samples were positive for LM, LS, and both LM and LS, respectively. Five different species of Listeria were identified with L. monocytogenes being the most prevalent …
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Essential features of a PrfA-dependent : promoter of Listeria monocytogenes
… with RNA polymerase loaded with purified SigB. Addition of purified PrfA protein has no effect on the SigB-dependent transcription. These in vitro transcription results indicate that the in vivo observed PrfA effect on the expression of most of the new genes is either indirect or …
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How did Listeria monocytogenes become pathogenic?
… possess surprisingly few sigma factors: SigA, SigB, SigH, SigL, and an extra-cytoplasmic function type sigma factor (SigECF). The stationary phase genes of L. monocytogenes is compared to the well-studied, complex, stationary phase networks of B. subtilis. This showed that while genetic …
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Charakterisierung neuer Zielstrukturen für die Antibiotikatherapie gegen Staphylococcus aureus und Entwicklung eines konditionalen In-vivo-Expressionssystems
… erfolgt unabhängig vom alternativen Sigmafaktor SigB. Durch Primer Extension-Experimente wurde eine putative PerR-Box vor dem nfrA-Gen identifiziert. Diese könnte für die Regulation von nfrA wichtig sein. Außerdem wird nfrA während des gesamten Wachstumszyklus von einem SigAabhängigen Promotor …