Journal ArticleDOI
Metallo-β-lactamases in the Age of Multidrug Resistance: From Structure and Mechanism to Evolution, Dissemination, and Inhibitor Design.
TLDR
In this article, a review of the active site and catalytic mechanism of Metallo-β-lactamases (MBLs) is presented, and the success of MBLs in conferring resistance to carbapenems, penicillins, and cephalosporins.Abstract:
Antimicrobial resistance is one of the major problems in current practical medicine. The spread of genes coding for resistance determinants among bacteria challenges the use of approved antibiotics, narrowing the options for treatment. Resistance to carbapenems, last resort antibiotics, is a major concern. Metallo-β-lactamases (MBLs) hydrolyze carbapenems, penicillins, and cephalosporins, becoming central to this problem. These enzymes diverge with respect to serine-β-lactamases by exhibiting a different fold, active site, and catalytic features. Elucidating their catalytic mechanism has been a big challenge in the field that has limited the development of useful inhibitors. This review covers exhaustively the details of the active-site chemistries, the diversity of MBL alleles, the catalytic mechanism against different substrates, and how this information has helped developing inhibitors. We also discuss here different aspects critical to understand the success of MBLs in conferring resistance: the molecular determinants of their dissemination, their cell physiology, from the biogenesis to the processing involved in the transit to the periplasm, and the uptake of the Zn(II) ions upon metal starvation conditions, such as those encountered during an infection. In this regard, the chemical, biochemical and microbiological aspects provide an integrative view of the current knowledge of MBLs.read more
Citations
More filters
Journal ArticleDOI
β-Lactam antibiotic targets and resistance mechanisms: from covalent inhibitors to substrates.
TL;DR: This tutorial-style review of the β-lactam antibiotics provides an overview of their covalent interactions with their target proteins and resistance mechanisms, and introduces the l,d-transpeptidases, a group of bacterial enzymes involved in peptidoglycan synthesis which are also targeted by β- lactams.
Journal ArticleDOI
Metallo-β-lactamases and a tug-of-war for the available zinc at the host–pathogen interface
TL;DR: Metallo-β-lactamases (MBLs) are zinc-dependent hydrolases that inactivate virtually all β lactam antibiotics as discussed by the authors , and metal starvation is a driving force acting on MBL evolution.
Journal ArticleDOI
1,2,4-Triazole-3-thione compounds with a 4-ethyl alkyl/aryl sulfide substituent are broad-spectrum metallo-β-lactamase inhibitors with re-sensitization activity.
Alice Legru,Federica Verdirosa,Jean-François Hernandez,G. Tassone,Filomena Sannio,Manuela Benvenuti,Pierre-Alexis Conde,Guillaume Bossis,Caitlyn A. Thomas,Michael W. Crowder,Melissa Dillenberger,Katja Becker,Cecilia Pozzi,Stefano Mangani,Jean Denis Docquier,Jean Denis Docquier,Laurent Gavara +16 more
TL;DR: In this paper, the potential of compounds based on the 1,2,4-triazole-3-thione scaffold as an original ligand of the di-zinc active sites of MBLs was explored.
Journal ArticleDOI
Deciphering the evolution of metallo-β-lactamases: a journey from the test tube to the bacterial periplasm.
TL;DR: In this paper , the evolutionary traits acquired by different clinical variants of MBLs in conditions mimicking their native environment (the bacterial periplasm) and considering whether they are soluble or membrane-bound proteins are discussed.
Journal ArticleDOI
Antimicrobial Activity of Aztreonam in Combination with Old and New β-Lactamase Inhibitors against MBL and ESBL Co-Producing Gram-Negative Clinical Isolates: Possible Options for the Treatment of Complicated Infections
Gianluca Morroni,Raffaela Bressan,Simona Fioriti,Gloria D’Achille,Marina Mingoia,Oscar Cirioni,Stefano Di Bella,Aurora Piazza,Francesco Comandatore,Carola Mauri,Roberta Migliavacca,Francesco Luzzaro,Luigi Principe,Cristina Lagatolla +13 more
TL;DR: In this paper, the authors assessed the activity of the combination of Aztreonam (ATM) with old and new β-lactamases inhibitors (BLIs) against MBL and ESBL co-producing Gram-negative clinical isolates.
References
More filters
Journal ArticleDOI
The Twin-Arginine Translocation Pathway of Mycobacterium smegmatis Is Functional and Required for the Export of Mycobacterial β-Lactamases
TL;DR: P phenotypic analyses of DeltatatA and Delt atatC deletion mutants of M. smegmatis demonstrated that t atA and tatC encode components of a functional Tat system capable of exporting characteristic Tat substrates, and it was demonstrated that 'BlaC can be used as a genetic reporter for Tat-dependent export in mycobacteria.
Journal ArticleDOI
Phenotypic Detection of Carbapenemase-Producing Organisms from Clinical Isolates.
TL;DR: Although there is no single phenotypic test that meets all specifications of the ideal test, there are a number of tests that are user-friendly, affordable, accurate, and feasible for implementation in clinical microbiology laboratories of all sizes.
Journal ArticleDOI
A structural view of the antibiotic degradation enzyme NDM-1 from a superbug
Yu Guo,Jing Wang,Niu Guojun,Wenqing Shui,Yuna Sun,Honggang Zhou,Yaozhou Zhang,Cheng Yang,Zhiyong Lou,Zihe Rao +9 more
TL;DR: Biological and mass spectroscopy results revealed that D-captopril can effectively inhibit the enzymatic activity of NDM-1 by binding to its active site with high binding affinity, and unique features concerning the primary sequence and structural conformation of the active site distinguish N DM-1 from other reported metallo-β-lactamases and implicate its role in wide spectrum drug resistance.
Journal ArticleDOI
Bacterial natural transformation by highly fragmented and damaged DNA.
Søren Overballe-Petersen,Klaus Harms,Ludovic Orlando,J. Victor Moreno Mayar,Simon Rasmussen,Tais W. Dahl,Minik T. Rosing,Anthony M. Poole,Thomas Sicheritz-Pontén,Søren Brunak,Sabrina Inselmann,Johann de Vries,Wilfried Wackernagel,Oliver G. Pybus,Rasmus Nielsen,Pål Jarle Johnsen,Kaare Magne Nielsen,Eske Willerslev +17 more
TL;DR: The findings reveal that short and damaged, including truly ancient, DNA molecules, which are present in large quantities in the environment, can be acquired by bacteria through natural transformation, suggesting that natural genetic exchange of DNA from dead and even extinct organisms to contemporary bacteria can take place over hundreds of thousands of years.
Journal ArticleDOI
Epidemiology and Mechanisms of Resistance of Extensively Drug Resistant Gram-Negative Bacteria
TL;DR: The mechanisms and global epidemiology of antibiotic resistance in some of the most clinically important resistance phenotypes, including carbapenem resistant Enterobacteriaceae, extensively drug resistant (XDR) Pseudomonas aeruginosa, and XDR Acinetobacter baumannii are reviewed.