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tipuana tipu/antibiotikum

Odkaz je uložen do schránky
ČlánkyKlinické testyPatenty
Strana 1 z 22 Výsledek

Structural basis for antibiotic recognition by the TipA class of multidrug-resistance transcriptional regulators.

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Přihlášení Registrace
The TipAL protein, a bacterial transcriptional regulator of the MerR family, is activated by numerous cyclic thiopeptide antibiotics. Its C-terminal drug-binding domain, TipAS, defines a subfamily of broadly distributed bacterial proteins including Mta, a central regulator of multidrug resistance in
One of the challenges in antibiotic lead discovery is the difficulty and time-consuming task of determining the mechanism of action (MOA) of antibacterial compounds. In this report, we describe the development and validation of a facile and inexpensive assay system utilizing disk diffusion of

Global changes in gene expression related to antibiotic synthesis in Streptomyces hygroscopicus.

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Two-dimensional gel electrophoresis was used to follow changes in gene expression associated with antibiotic (bialaphos) biosynthesis in Streptomyces hygroscopicus. Cultures were pulse-labelled with [35S]-methionine before, during, and after the switch from primary to secondary metabolism in order

Identification of a regulator that controls stationary-phase expression of catalase-peroxidase in Caulobacter crescentus.

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Přihlášení Registrace
Expression of the catalase-peroxidase of Caulobacter crescentus, a gram-negative member of the alpha subdivision of the Proteobacteria, is 50-fold higher in stationary-phase cultures than in exponential cultures. To identify regulators of the starvation response, Tn5 insertion mutants were isolated

Molecular interactions between thiostrepton and the TipAS protein from Streptomyces lividans.

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Přihlášení Registrace
In Streptomyces lividans, the expression of several proteins is stimulated by the thiopeptide antibiotic thiostrepton. Two of these, TipAL and TipAS, autoregulate their expression after covalently binding to thiostrepton; this irreversibly sequesters the antibiotic and desensitizes the organism to

Identification of cellular targets of a series of boron heterocycles using TIPA II-A sensitive target identification platform.

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One of the hurdles in the discovery of antibiotics is the difficulty of linking antibacterial compounds to their cellular targets. Our laboratory has employed a genome-wide approach of over-expressing essential genes in order to identify cellular targets of antibacterial inhibitors. Our objective in

Thiostrepton, a natural compound that triggers heat shock response and apoptosis in human cancer cells: a proteomics investigation.

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Přihlášení Registrace
Thiostrepton is a natural antibiotic produced by bacteria of Streptomyces genus. We identified Thiostrepton as a strong hit in a cell-based small molecule screen for DIAP1 stability modulators. It was shown previously that Thiostrepton induces upregulation of several gene products in Streptomyces

Characterization of the covalent binding of thiostrepton to a thiostrepton-induced protein from Streptomyces lividans.

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Thiostrepton is a highly modified multicyclic peptide antibiotic synthesized by diverse bacteria. Although best known as an inhibitor of protein synthesis, thiostrepton is also a potent activator of gene expression in Streptomyces lividans. In these studies, we characterize the nature of the

Thiostrepton-induced gene expression in Streptomyces lividans.

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Přihlášení Registrace
Thiostrepton induced the expression of four proteins (17, 19, 30, and 56 kilodaltons) of unknown function in Streptomyces lividans. The chromosomal gene which encoded the 19-kilodalton protein (tipA) was cloned and sequenced. Transcription of the tipA promoter was induced at least 200-fold by
TipAL is a Streptomyces transcriptional activator assigned to the MerR/SoxR family based both on homology within its putative DNA recognition domain and the fact that its operator binding sites lie within a region of its promoter normally occupied by RNA polymerase. The tipA gene is also

Structural basis and dynamics of multidrug recognition in a minimal bacterial multidrug resistance system.

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Přihlášení Registrace
TipA is a transcriptional regulator found in diverse bacteria. It constitutes a minimal autoregulated multidrug resistance system against numerous thiopeptide antibiotics. Here we report the structures of its drug-binding domain TipAS in complexes with promothiocin A and nosiheptide, and a model of

Radamycin, a novel thiopeptide produced by streptomyces sp. RSP9. I. Taxonomy, fermentation, isolation and biological activities.

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Přihlášení Registrace
The newly isolated strain Streptomyces sp. RSP9 produces two thiopeptides; one of them is methylsulfomycin I, which shows potent antibiotic activity against several gram-positive bacteria such as Micrococcus luteus and Staphylococcus aureus. The other is a new thiopeptide named radamycin. In the

Promoinducin, a novel thiopeptide produced by Streptomyces sp. SF2741.

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Přihlášení Registrace
Our continued screening to find tipA promoter-inducing substances resulted in the isolation of promoinducin from a mycelial extract of Streptomyces sp. SF2741. Based on various 1D- and 2D-NMR studies, including field gradient (FG)-COSY, HSQC, FG-HMBC, phase-sensitive 13C-decoupled HMBC and NOESY

Charged acrylamide copolymer gels as media for weak alignment.

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The use of mechanically strained acrylamide/acrylate copolymers is reported as a new alignment medium for biomacromolecules. Compared to uncharged, strained polyacrylamide gels, the negative charges of the acrylamide/acrylate copolymer strongly alter the alignment tensor and lead to pronounced

A gene cloning system for the siomycin producer Streptomyces sioyaensis NRRL-B5408.

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Přihlášení Registrace
Streptomyces sioyaensis NRRL-B5408 produces a siomycin complex (a group of thiopeptide antibiotics structurally related to thiostrepton). Development of genetic tools for the detection of siomycin production and DNA transfer into this strain is described. The existing tipA-based reporter system for
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