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Showing 1 to 12 of 12 for “"RpoN"”.
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Estudio de genómica comparada de genes bacterianos relacionados con la proliferación en la rizosfera
… in the different stages of colonization. The RpoN and FliA genes have been described as genes involved in biosynthesis, the RelA gene is related to stress adaptation and the GalU gene is described as involved in the later stages of colonization. This work carries out a study on selection by …
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Novel pleiotropic regulators of flotation, secondary metabolite production, and virulence in Serratia sp. ATCC 39006
… O-antigen ligase (waaL), the sigma factor σ54 (rpoN), and a transcription factor (dksA). The waaL mutant exhibited increased transcription and expression of GV genes but was unable to float. Pleiotropic effects of the transposon insertion included an increase in carbapenem production and a …
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Functional analysis of the role of alternative sigma factors in Vibrio parahaemolyticus host pathogen interactions
… genes were shown to be upregulated in an rpoN mutant strain, as was VP0055. The rpoN mutant strain was a hypercolonizer of an adult streptomycin treated mouse model compared to wild-type and carbon catabolism differences may be involved in this phenotype. The role of VP0055 and RpoN in the …
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A Molecular Genetic Investigation of the Regulation of Outer Surface Protein C in Borrelia Burgdorferi: Identification and Characterization of the Novel Regulatory Protein BBD18
… It has been shown that the central Rrp2/RpoN/RpoS pathway is essential for the upregulation of OspC and other genes important for mammalian infection. However, many key aspects in the strict regulation of OspC remain undefined. In order to investigate the complex regulatory mechanisms …
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A Molecular Genetic Investigation of the Regulation of Outer Surface Protein C in Borrelia Burgdorferi: Identification and Characterization of the Novel Regulatory Protein BBD18
… It has been shown that the central Rrp2/RpoN/RpoS pathway is essential for the upregulation of OspC and other genes important for mammalian infection. However, many key aspects in the strict regulation of OspC remain undefined. In order to investigate the complex regulatory mechanisms …
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Regulación simbiótica de la expresión del sistema hidrogenasa por NifA en R. leguminosarum bv. viciae
… de tipo -24/-12 cuya expresión es dependiente de RpoN, de IHF y del activador transcripcional NifA. La activación dependiente de NifA de P1, fue corroborada en el fondo genético de K.pneumoniae mediante experimentos de inhibición de la nitrogenasa por múltiples copias de P1, y en el fondo de …
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Characterization of major virulence regulators of Erwinia amylovora
… Other sigma factors characterized included RpoN, a nitrogen limitation σ54 factor, and its modulation protein YhbH. Our results showed that mutations in hrpS, hrpL, rpoN and yhbH resulted in nonpathogenic phenotype in host plant and no hypersensitive response in non-host tobacco. …
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Untersuchungen zur Regulation Motilitäts-assoziierter Gene in Helicobacter pylori
… die beiden alternativen Sigma-Faktoren FliA und RpoN, der Anti-Sigma28-Faktor FlgM, das RpoN-spezifische Zwei-Komponenten System FlgS/FlgR und die Flagellen-Basalkörperkomponenten FlhA und FlhF. Bis auf die fliA- und flgM-Mutanten, die, in Übereinstimmung mit ihrer antagonistischen Funktion, …
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Developing In Vitro and In Vivo Models for Lyme Neuroborreliosis (LNB)
… With these models, we discovered that the Rrp2-RpoN-RpoS pathway in B. burgdorferi is essential for B. burgdorferi to cross the BBB and that the outer surface protein C (OspC) controlled by this pathway plays a vital role in crossing the BBB. We found that B. burgdorferi is detectable in the …
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Alternative regulation of the alginate algD operon by an activated AlgB in nonmucoid Pseudomonas aeruginosa is dependent on Sigma 54
… mutant. In contrast, introduction of an rpoN mutation showed that alginate production mediated by AlgBwt and AlgBE125K was σ54 dependent. The increase in expression of alginate by AlgBwt in the presence of σ54 and the absence of σ22 suggested a competition between the sigma factors for …
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Molecular mechanisms underlying regulation of type III secretion system upstream of the master regulator HrpL in Erwinia amylovora
… the control of sigma 54 complex, including σ54 (RpoN), its modulation protein YhbH and σ54-enhancer binding protein HrpS. In this study, we investigated the role of integration host factors (IHFs) in regulating σ54-dependent hrpL and other T3SS gene expression. IHFs are nucleoid-associated …
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Genome-wide studies of virulence-associated mechanisms in Erwinia amylovora
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-05-01