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• W2907291204 abstract "Lipoglycopeptide antibiotics, for example, teicoplanin (Tei) and A40926, are more potent than vancomycin against Gram-positive (Gram-(+)) drug-resistant pathogens, for example, methicillin-resistant Staphylococcus aureus (MRSA). To extend their therapeutic effectiveness on vancomycin-resistant S. aureus (VRSA), the biosynthetic pathway of the N-acyl glucosamine (Glc) pharmacophore at residue 4 (r4) of teicoplanin pseudoaglycone redirection to residue 6 (r6) was attempted. On the basis of crystal structures, two regioselective biocatalysts Orf2*T (a triple-mutation mutant S98A/V121A/F193Y) and Orf11*S (a single-mutation mutant W163A) were engineered, allowing them to act on GlcNAc at r6. New analogs thereby made show marked antimicrobial activity against MRSA and VRSA by 2-3 orders of magnitude better than teicoplanin and vancomycin. The lipid side chain of the Tei-analogs armed with a terminal mono- or diguanidino group extends the antimicrobial specificity from Gram-(+) to Gram-negative (Gram-(-)), comparable to that of kanamycin. In addition to low cytotoxicity and high safety, the Tei analogs exhibit new modes of action as a result of resensitization of VRSA and Acinetobacter baumannii. The redirection of the biosynthetic pathway for the N-acyl-Glc pharmacophore from r4 to r6 bodes well for large-scale production of selected r6,Tei congeners in an environmentally friendly synthetic biology approach." @default.
• W2907291204 created "2019-01-11" @default.
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• W2907291204 date "2019-01-01" @default.
• W2907291204 modified "2023-10-03" @default.
• W2907291204 title "Teicoplanin Reprogrammed with the N-Acyl-Glucosamine Pharmacophore at the Penultimate Residue of Aglycone Acquires Broad-Spectrum Antimicrobial Activities Effectively Killing Gram-Positive and -Negative Pathogens" @default.
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• W2907291204 doi "https://doi.org/10.1021/acsinfecdis.8b00317" @default.
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• W2907291204 hasPublicationYear "2019" @default.
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