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Novel Acquired Metallo-β-Lactamase Gene, blaSIM-1, in a Class 1 Integron from Acinetobacter baumannii Clinical Isolates from Korea
ABSTRACT Carbapenem resistance mediated by acquired carbapenemase genes has been increasingly reported, particularly for clinical isolates of Pseudomonas aeruginosa and Acinetobacter spp. Of 1,234Expand
The three-dimensional structure of VIM-2, a Zn-beta-lactamase from Pseudomonas aeruginosa in its reduced and oxidised form.
TLDR
The crystal structures of the universally widespread metallo-beta-lactamase (MBL) Verona integron-encoded MBL (VIM)-2 from Pseudomonas aeruginosa have been solved in their native form as well as in an unexpected oxidised form to explain the different activities and antibiotic specificities. Expand
Crystal structure of the OXA-48 beta-lactamase reveals mechanistic diversity among class D carbapenemases.
TLDR
Molecular dynamics pointed to the functional relevance of residues located in or close to the beta5-beta6 loop and allowed us to propose a mechanism for carbapenem hydrolysis by OXA-48. Expand
Structural Insight into Potent Broad-Spectrum Inhibition with Reversible Recyclization Mechanism: Avibactam in Complex with CTX-M-15 and Pseudomonas aeruginosa AmpC β-Lactamases
TLDR
The structures of two clinically important β-lactamase enzymes bound to avibactam are described and the structures reveal similar binding modes in both enzymes and thus provide a rationale for the broad-spectrum inhibitory activity of avibactsam, which has recently been shown to be a reversible inhibitor. Expand
Emergence in Klebsiella pneumoniae and Enterobacter cloacae Clinical Isolates of the VIM-4 Metallo-β-Lactamase Encoded by a Conjugative Plasmid
TLDR
Enterobacteria appear to increasingly contribute to the spread of VIM-type enzymes as resistance to carbapenems is an emerging problem among gram-negative hospital pathogens. Expand
IMP-12, a New Plasmid-Encoded Metallo-β-Lactamase from a Pseudomonas putida Clinical Isolate
TLDR
Kinetic analysis revealed that, like other IMP variants, IMP-12 exhibits an overall preference for cephalosporins and carbapenems rather than for penicillins and does not hydrolyze temocillin and aztreonam. Expand
Molecular basis of selective inhibition and slow reversibility of avibactam against class D carbapenemases: a structure-guided study of OXA-24 and OXA-48.
TLDR
Mechanisms for acylation and deacylation of avibactam by class D enzymes are proposed, and the likely extent of inhibition of class D β-lactamases by avibactsam is discussed. Expand
Nosocomial Infections Caused by Multidrug-Resistant Isolates of Pseudomonas putida Producing VIM-1 Metallo-β-Lactamase
TLDR
PCRs showed that the blaVIM-1-containing cassette was identical to that previously found in strains of different species from other Italian hospitals and that the cassette array of In110 was not identical but clearly related to that of In70, pointing to a common origin of this cassette and to a related evolutionary history of their cognate integrons. Expand
Metallo-beta-lactamases as emerging resistance determinants in Gram-negative pathogens: open issues.
TLDR
A number of European experts in the field met to review the current knowledge on this phenomenon, to point out open issues and to reinforce and relate to one another the existing activities set forth by research institutes, scientific societies and European Union-driven networks. Expand
Biochemical and Structural Characterization of the Subclass B1 Metallo-β-Lactamase VIM-4
TLDR
Study of the thermal stability and the activity of the holo- and apo-VIM-4 enzymes revealed that Zn2+ ions have a pronounced stabilizing effect on the enzyme and are necessary for preserving the structure. Expand
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