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• W3045707462 abstract "Abstract Genes that confer antibiotic resistance can rapidly be disseminated from one microorganism to another by mobile genetic elements, thus transferring resistance to previously susceptible bacterial strains. The misuse of antibiotics in health care and agriculture has provided a powerful evolutionary pressure to accelerate the spread of resistance genes, including those encoding β-lactamases. These are enzymes that are highly efficient in inactivating most of the commonly used β-lactam antibiotics. However, genes that confer antibiotic resistance are not only associated with pathogenic microorganisms, but are also found in non-pathogenic (i.e. environmental) microorganisms. Two recent examples are metal-dependent β-lactamases (MBLs) from the marine organisms Novosphingobium pentaromativorans and Simiduia agarivorans. Previous studies have demonstrated that their β-lactamase activity is comparable to those of well-known MBLs from pathogenic sources (e.g. NDM-1, AIM-1) but that they also possess efficient lactonase activity, an activity associated with quorum sensing. Here, we probed the structure and mechanism of these two enzymes using crystallographic, spectroscopic and fast kinetics techniques. Despite highly conserved active sites both enzymes demonstrate significant variations in their reaction mechanisms, highlighting both the extraordinary ability of MBLs to adapt to changing environmental conditions and the rather promiscuous acceptance of diverse substrates by these enzymes." @default.
• W3045707462 created "2020-08-03" @default.
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• W3045707462 date "2020-07-30" @default.
• W3045707462 modified "2023-10-18" @default.
• W3045707462 title "Structure and mechanism of potent bifunctional β-lactam- and homoserine lactone-degrading enzymes from marine microorganisms" @default.
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• W3045707462 doi "https://doi.org/10.1038/s41598-020-68612-z" @default.
• W3045707462 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7392888" @default.
• W3045707462 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/32732933" @default.
• W3045707462 hasPublicationYear "2020" @default.
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