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- W2152598367 abstract "ABSTRACT Daptomycin is a cyclic lipopeptide antibiotic approved for the treatment of skin and skin structure infections caused by Gram-positive pathogens and for that of bacteremia and right-sided endocarditis caused by Staphylococcus aureus . Daptomycin failed to meet noninferiority criteria for the treatment of community-acquired pneumonia, likely due to sequestration in pulmonary surfactant. Many analogues of daptomycin have been generated by combinatorial biosynthesis, but only two displayed improved activity in the presence of bovine surfactant, and neither was as active as daptomycin in vitro . In the present study, we generated hybrid molecules of the structurally related lipopeptide A54145 in Streptomyces fradiae and tested them for antibacterial activity in the presence of bovine surfactant. Hybrid A54145 nonribosomal peptide synthetase (NRPS) biosynthetic genes were constructed by genetic engineering and were expressed in combination with a deletion of the lptI methyltransferase gene, which is involved in the formation of the 3-methyl-glutamic acid (3mGlu) residue at position 12. Some of the compounds were very active against S. aureus and other Gram-positive pathogens; one compound was also highly active in the presence of bovine surfactant, had low acute toxicity, and showed some efficacy against Streptococcus pneumoniae in a mouse model of pulmonary infection." @default.
- W2152598367 created "2016-06-24" @default.
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- W2152598367 date "2010-04-01" @default.
- W2152598367 modified "2023-10-16" @default.
- W2152598367 title "Genetically Engineered Lipopeptide Antibiotics Related to A54145 and Daptomycin with Improved Properties" @default.
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- W2152598367 doi "https://doi.org/10.1128/aac.01307-09" @default.
- W2152598367 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2849371" @default.
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