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• W4312124003 startingPage "15713" @default.
• W4312124003 abstract "Glycopeptide antibiotics (GPAs) are among the most clinically successful antimicrobials. GPAs inhibit cell-wall biosynthesis in Gram-positive bacteria via binding to lipid II. Natural GPAs are produced by various actinobacteria. Being themselves Gram-positives, the GPA producers evolved sophisticated mechanisms of self-resistance to avoid suicide during antibiotic production. These self-resistance genes are considered the primary source of GPA resistance genes actually spreading among pathogenic enterococci and staphylococci. The GPA-resistance mechanism in Actinoplanes teichomyceticus—the producer of the last-resort-drug teicoplanin—has been intensively studied in recent years, posing relevant questions about the role of Tei3 sensor histidine kinase. In the current work, the molecular properties of Tei3 were investigated. The setup of a GPA-responsive assay system in the model Streptomyces coelicolor allowed us to demonstrate that Tei3 functions as a non-inducible kinase, conferring high levels of GPA resistance in A. teichomyceticus. The expression of different truncated versions of tei3 in S. coelicolor indicated that both the transmembrane helices of Tei3 are crucial for proper functioning. Finally, a hybrid gene was constructed, coding for a chimera protein combining the Tei3 sensor domain with the kinase domain of VanS, with the latter being the inducible Tei3 ortholog from S. coelicolor. Surprisingly, such a chimera did not respond to teicoplanin, but indeed to the related GPA A40926. Coupling these experimental results with a further in silico analysis, a novel scenario on GPA-resistance and biosynthetic genes co-evolution in A. teichomyceticus was hereby proposed." @default.
• W4312124003 created "2023-01-04" @default.
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• W4312124003 date "2022-12-11" @default.
• W4312124003 modified "2023-10-16" @default.
• W4312124003 title "Heterologous Expression Reveals Ancient Properties of Tei3—A VanS Ortholog from the Teicoplanin Producer Actinoplanes teichomyceticus" @default.
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• W4312124003 doi "https://doi.org/10.3390/ijms232415713" @default.
• W4312124003 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36555354" @default.
• W4312124003 hasPublicationYear "2022" @default.
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