Rk Action
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Antibacterial efficacy of Nisin, Pediocin 34 and Enterocin FH99 against Listeria monocytogenes and cross resistance of its bacteriocin resistant variants to common food preservatives
Antilisterial efficiency of three bacteriocins, viz, Nisin, Pediocin 34 and Enterocin FH99 was tested individually and in combination against Listeria mononcytogenes ATCC 53135. A greater antibacterial effect was observed when the bacteriocins were combined in pairs, indicating that the use of more than one LAB bacteriocin in combination have a higher antiba
Braz. J. Microbiol.. Publicado em: 14/05/2013
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2. ASYMPTOTIC LINKING INVARIANTS FOR RKACTIONS IN COMPACT RIEMANNIAN MANIFOLDS / ÍNDICES DE ENLAÇAMENTO ASSINTÓTICO PARA AÇÕES DE RK EM VARIEDADES RIEMANNIANAS COMPACTAS
V.I. Arnold, in his paper The algebraic Hopf invariant and its applications published in 1986, considered a compact domain (ômega maiúsculo) in R3 with a smooth boundary and trivial homology and two divergence free vector fields X and Y in (ômega maiúsculo) tangent to the boundary. He defined an asymptotic linking invariant lk(X; Y ) and a Hopf invariant
Publicado em: 2005
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3. Detergent-Like Activity and α-Helical Structure of Warnericin RK, an Anti-Legionella Peptide
Warnericin RK is the first antimicrobial peptide known to be active against Legionella pneumophila, a pathogen bacterium that is responsible for severe pneumonia. Strikingly, this peptide displays a very narrow range of antimicrobial activity, almost limited to the Legionella genus, and a hemolytic activity. A similar activity has been described for δ-lysin
The Biophysical Society.
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4. Essential genes of plasmid RK2 in Escherichia coli: trfB region controls a kil gene near trfA.
Plasmid RK2 encodes several kil determinants whose lethal action on Escherichia coli host cells is prevented by RK2 kor genes. Here we show that the mini-RK2 plasmid, pRK248, specifies a kilB component (kilB1) in the region of the replication gene trfA. kilB1 is different from trfA and is completely encoded within the pRK248 HaeII A fragment. Transformation
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5. Action of Interferon: Kinetics and Differential Effects on Viral Functions
A highly purified rabbit interferon was tested for its capacity to inhibit various manifestations of infection of primary rabbit kidney (RK) cells with vesicular stomatitis (VS) virus. A kinetic analysis of the actinomycin-sensitive phase of interferon-induced cellular resistance revealed that RK cells could transcribe virtually all of the hypothetical antiv
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6. Sensitivity of Ribonucleic Acid and Deoxyribonucleic Acid Viruses to Different Species of Interferon in Cell Cultures
Although two deoxyribonucleic acid (DNA) viruses, pseudorabies (PsRV) and vaccinia, are as susceptible as a ribonucleic acid (RNA) virus, vesicular stomatitis (VSV), to interferon when tested in chicken or mouse cells, they are refractory to inhibition in interferon-treated primary rabbit kidney cells and in a continuous line (RK-13) of rabbit kidney cells.
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7. IncC of Broad-Host-Range Plasmid RK2 Modulates KorB Transcriptional Repressor Activity In Vivo and Operator Binding In Vitro
The korAB operon of broad-host-range plasmid RK2 encodes five genes, two of which, incC and korB, belong to the parA and parB families, respectively, of genome partitioning functions. Both korB and a third gene, korA, are responsible for coordinate regulation of operons encoding replication, transfer, and stable inheritance functions. Overexpression of incC
American Society for Microbiology.
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8. Gene regulation on broad host range plasmid RK2: identification of three novel operons whose transcription is repressed by both KorA and KorC.
The product of the korA gene of broad host range plasmid RK2 is a key transcriptional repressor which regulates not only the expression of the essential replication gene trfA but also its own expression and that of the kilA operon. It has previously been proposed that korA also encodes a positive activator of transcription of the korC gene, which may act as
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9. The phenotypes of temperature-sensitive mini-RK2 replicons carrying mutations in the replication control gene trfA are suppressed nonspecifically by intragenic cop mutations.
The minimal replicon of the broad-host-range plasmid RK2 consists of the origin of vegetative replication (oriV) and a gene (trfA) encoding an essential replication protein that binds to short repeats in oriV. We report here the results of a DNA sequence analysis of seven unique mutants that are temperature sensitive for replication in Escherichia coli. The
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10. ParB of Pseudomonas aeruginosa: Interactions with Its Partner ParA and Its Target parS and Specific Effects on Bacterial Growth
The par genes of Pseudomonas aeruginosa have been studied to increase the understanding of their mechanism of action and role in the bacterial cell. Key properties of the ParB protein have been identified and are associated with different parts of the protein. The ParB- ParB interaction domain was mapped in vivo and in vitro to the C-terminal 56 amino acids
American Society for Microbiology.