51
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Lohans CT, Wang DY, Jorgensen C, Cahill ST, Clifton IJ, McDonough MA, Oswin HP, Spencer J, Domene C, Claridge TDW, Brem J, Schofield CJ. 13C-Carbamylation as a mechanistic probe for the inhibition of class D β-lactamases by avibactam and halide ions. Org Biomol Chem 2018; 15:6024-6032. [PMID: 28678295 DOI: 10.1039/c7ob01514c] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The class D (OXA) serine β-lactamases are a major cause of resistance to β-lactam antibiotics. The class D enzymes are unique amongst β-lactamases because they have a carbamylated lysine that acts as a general acid/base in catalysis. Previous crystallographic studies led to the proposal that β-lactamase inhibitor avibactam targets OXA enzymes in part by promoting decarbamylation. Similarly, halide ions are proposed to inhibit OXA enzymes via decarbamylation. NMR analyses, in which the carbamylated lysines of OXA-10, -23 and -48 were 13C-labelled, indicate that reaction with avibactam does not ablate lysine carbamylation in solution. While halide ions did not decarbamylate the 13C-labelled OXA enzymes in the absence of substrate or inhibitor, avibactam-treated OXA enzymes were susceptible to decarbamylation mediated by halide ions, suggesting halide ions may inhibit OXA enzymes by promoting decarbamylation of acyl-enzyme complex. Crystal structures of the OXA-10 avibactam complex were obtained with bromide, iodide, and sodium ions bound between Trp-154 and Lys-70. Structures were also obtained wherein bromide and iodide ions occupy the position expected for the 'hydrolytic water' molecule. In contrast with some solution studies, Lys-70 was decarbamylated in these structures. These results reveal clear differences between crystallographic and solution studies on the interaction of class D β-lactamases with avibactam and halides, and demonstrate the utility of 13C-NMR for studying lysine carbamylation in solution.
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Affiliation(s)
| | - David Y Wang
- Department of Chemistry, University of Oxford, Oxford, OX1 3TA, UK.
| | | | - Samuel T Cahill
- Department of Chemistry, University of Oxford, Oxford, OX1 3TA, UK.
| | - Ian J Clifton
- Department of Chemistry, University of Oxford, Oxford, OX1 3TA, UK.
| | | | - Henry P Oswin
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, BS8 1TD, UK
| | - James Spencer
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, BS8 1TD, UK
| | - Carmen Domene
- Department of Chemistry, University of Oxford, Oxford, OX1 3TA, UK. and Department of Chemistry, King's College London, London, SE1 1DB, UK
| | | | - Jürgen Brem
- Department of Chemistry, University of Oxford, Oxford, OX1 3TA, UK.
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Streptomyces clavuligerus shows a strong association between TCA cycle intermediate accumulation and clavulanic acid biosynthesis. Appl Microbiol Biotechnol 2018. [PMID: 29523936 DOI: 10.1007/s00253-018-8841-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Clavulanic acid (CA) is produced by Streptomyces clavuligerus (S. clavuligerus) as a secondary metabolite. Knowledge about the carbon flux distribution along the various routes that supply CA precursors would certainly provide insights about metabolic performance. In order to evaluate metabolic patterns and the possible accumulation of tricarboxylic acid (TCA) cycle intermediates during CA biosynthesis, batch and subsequent continuous cultures with steadily declining feed rates were performed with glycerol as the main substrate. The data were used to in silico explore the metabolic capabilities and the accumulation of metabolic intermediates in S. clavuligerus. While clavulanic acid accumulated at glycerol excess, it steadily decreased at declining dilution rates; CA synthesis stopped when glycerol became the limiting substrate. A strong association of succinate, oxaloacetate, malate, and acetate accumulation with CA production in S. clavuligerus was observed, and flux balance analysis (FBA) was used to describe the carbon flux distribution in the network. This combined experimental and numerical approach also identified bottlenecks during the synthesis of CA in a batch and subsequent continuous cultivation and demonstrated the importance of this type of methodologies for a more advanced understanding of metabolism; this potentially derives valuable insights for future successful metabolic engineering studies in S. clavuligerus.
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53
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Ge Y, Zhou YJ, Yang KW, Zhang YL, Xiang Y, Zhang YJ. Real-time activity assays of β-lactamases in living bacterial cells: application to the inhibition of antibiotic-resistant E. coli strains. MOLECULAR BIOSYSTEMS 2017; 13:2323-2327. [PMID: 28906528 DOI: 10.1039/c7mb00487g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The emergence of antibiotic resistance caused by β-lactamases, including serine β-lactamases (SβLs) and metallo-β-lactamases (MβLs), is a global public health threat. L1, a B3 subclass MβL, hydrolyzes almost all of known β-lactam antibiotics. We report a simple and straightforward UV-Vis approach for real-time activity assays of β-lactamases inside living bacterial cells, and this method has been exemplified by choosing antibiotics, L1 enzyme, Escherichia coli expressing L1 (L1 E. coli), Escherichia coli expressing extended-spectrum β-lactamases (ESBL-E. coli), clinical bacterial strains, and reported MβL and SβL inhibitors. The cell-based studies demonstrated that cefazolin was hydrolyzed by L1 E. coli and clinical strains, and confirmed the hydrolysis to be inhibited by two known L1 inhibitors EDTA and azolylthioacetamide (ATAA), with an IC50 value of 1.6 and 18.9 μM, respectively. Also, it has been confirmed that the breakdown of cefazolin caused by ESBL-E. coli was inhibited by clavulanic acid, the first SβL inhibitor approved by FDA. The data gained through this approach are closely related to the biological function of the target enzyme in its physiological environment. The UV-Vis method proposed here can be applied to target-based whole-cell screening to search for potent β-lactamase inhibitors, and to assays of reactions in complex biological systems, for instance in medical assays.
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Affiliation(s)
- Ying Ge
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Chemical Biology Innovation Lab, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, P. R. China.
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54
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Synthesis and biological evaluation of Aspergillomarasmine A derivatives as novel NDM-1 inhibitor to overcome antibiotics resistance. Bioorg Med Chem 2017; 25:5133-5141. [DOI: 10.1016/j.bmc.2017.07.025] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Revised: 07/11/2017] [Accepted: 07/12/2017] [Indexed: 02/08/2023]
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55
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Zidan A, Garrec J, Cordier M, El-Naggar AM, Abd El-Sattar NEA, Ali AK, Hassan MA, El Kaim L. β-Lactam Synthesis through Diodomethane Addition to Amide Dianions. Angew Chem Int Ed Engl 2017; 56:12179-12183. [DOI: 10.1002/anie.201706315] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Affiliation(s)
- Alaa Zidan
- Laboratoire de Synthèse Organique; CNRS, Ecole Polytechnique, ENSTA ParisTech-UMR 7652; Université Paris-Saclay; 828 Bd des Maréchaux 91128 Palaiseau France
- Chemistry Department; Faculty of Science; Ain Shams University; Abbasia Cairo Egypt
| | - Julian Garrec
- Unité Chimie et Procédés; ENSTA ParisTech; Université Paris-Saclay; 828 Bd des Maréchaux 91128 Palaiseau France
| | - Marie Cordier
- Laboratoire de Chimie Moléculaire; UMR 9168; Department of Chemistry; Ecole Polytechnique; CNRS; 91128 Palaiseau Cedex France
| | - Abeer M. El-Naggar
- Chemistry Department; Faculty of Science; Ain Shams University; Abbasia Cairo Egypt
| | | | - Ali Khalil Ali
- Chemistry Department; Faculty of Science; Ain Shams University; Abbasia Cairo Egypt
| | - Mohamed Ali Hassan
- Chemistry Department; Faculty of Science; Ain Shams University; Abbasia Cairo Egypt
| | - Laurent El Kaim
- Laboratoire de Synthèse Organique; CNRS, Ecole Polytechnique, ENSTA ParisTech-UMR 7652; Université Paris-Saclay; 828 Bd des Maréchaux 91128 Palaiseau France
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56
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A general reaction mechanism for carbapenem hydrolysis by mononuclear and binuclear metallo-β-lactamases. Nat Commun 2017; 8:538. [PMID: 28912448 PMCID: PMC5599593 DOI: 10.1038/s41467-017-00601-9] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 07/12/2017] [Indexed: 12/16/2022] Open
Abstract
Carbapenem-resistant Enterobacteriaceae threaten human health, since carbapenems are last resort drugs for infections by such organisms. Metallo-β-lactamases (MβLs) are the main mechanism of resistance against carbapenems. Clinically approved inhibitors of MBLs are currently unavailable as design has been limited by the incomplete knowledge of their mechanism. Here, we report a biochemical and biophysical study of carbapenem hydrolysis by the B1 enzymes NDM-1 and BcII in the bi-Zn(II) form, the mono-Zn(II) B2 Sfh-I and the mono-Zn(II) B3 GOB-18. These MβLs hydrolyse carbapenems via a similar mechanism, with accumulation of the same anionic intermediates. We characterize the Michaelis complex formed by mono-Zn(II) enzymes, and we identify all intermediate species, enabling us to propose a chemical mechanism for mono and binuclear MβLs. This common mechanism open avenues for rationally designed inhibitors of all MβLs, notwithstanding the profound differences between these enzymes’ active site structure, β-lactam specificity and metal content. Carbapenem-resistant bacteria pose a major health threat by expressing metallo-β-lactamases (MβLs), enzymes able to hydrolyse these life-saving drugs. Here the authors use biophysical and computational methods and show that different MβLs share the same reaction mechanism, suggesting new strategies for drug design.
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57
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Mojica MF, Bonomo RA, Fast W. B1-Metallo-β-Lactamases: Where Do We Stand? Curr Drug Targets 2017; 17:1029-50. [PMID: 26424398 DOI: 10.2174/1389450116666151001105622] [Citation(s) in RCA: 146] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Revised: 12/31/1969] [Accepted: 09/14/2015] [Indexed: 11/22/2022]
Abstract
Metallo-β-Lactamases (MBLs) are class Bβ-lactamases that hydrolyze almost all clinically-availableβ-lactam antibiotics. MBLs feature the distinctive αβ/βα sandwich fold of the metallo-hydrolase/oxidoreductase superfamily and possess a shallow active-site groove containing one or two divalent zinc ions, flanked by flexible loops. According to sequence identity and zinc ion dependence, MBLs are classified into three subclasses (B1, B2 and B3), of which the B1 subclass enzymes have emerged as the most clinically significant. Differences among the active site architectures, the nature of zinc ligands, and the catalytic mechanisms have limited the development of a common inhibitor. In this review, we will describe the molecular epidemiology and structural studies of the most prominent representatives of class B1 MBLs (NDM-1, IMP-1 and VIM-2) and describe the implications for inhibitor design to counter this growing clinical threat.
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Affiliation(s)
| | - Robert A Bonomo
- Medical Service, Louis Stokes Cleveland Department of Veterans Affairs Medical Center, 10701 East Blvd., Cleveland, OH 44106, USA.
| | - Walter Fast
- Division of Medicinal Chemistry, College of Pharmacy, University of Texas, Austin TX, 78712, USA.
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58
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Zidan A, Garrec J, Cordier M, El-Naggar AM, Abd El-Sattar NEA, Ali AK, Hassan MA, El Kaim L. β-Lactam Synthesis through Diodomethane Addition to Amide Dianions. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201706315] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Alaa Zidan
- Laboratoire de Synthèse Organique; CNRS, Ecole Polytechnique, ENSTA ParisTech-UMR 7652; Université Paris-Saclay; 828 Bd des Maréchaux 91128 Palaiseau France
- Chemistry Department; Faculty of Science; Ain Shams University; Abbasia Cairo Egypt
| | - Julian Garrec
- Unité Chimie et Procédés; ENSTA ParisTech; Université Paris-Saclay; 828 Bd des Maréchaux 91128 Palaiseau France
| | - Marie Cordier
- Laboratoire de Chimie Moléculaire; UMR 9168; Department of Chemistry; Ecole Polytechnique; CNRS; 91128 Palaiseau Cedex France
| | - Abeer M. El-Naggar
- Chemistry Department; Faculty of Science; Ain Shams University; Abbasia Cairo Egypt
| | | | - Ali Khalil Ali
- Chemistry Department; Faculty of Science; Ain Shams University; Abbasia Cairo Egypt
| | - Mohamed Ali Hassan
- Chemistry Department; Faculty of Science; Ain Shams University; Abbasia Cairo Egypt
| | - Laurent El Kaim
- Laboratoire de Synthèse Organique; CNRS, Ecole Polytechnique, ENSTA ParisTech-UMR 7652; Université Paris-Saclay; 828 Bd des Maréchaux 91128 Palaiseau France
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59
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Decuyper L, Jukič M, Sosič I, Žula A, D'hooghe M, Gobec S. Antibacterial and β-Lactamase Inhibitory Activity of Monocyclic β-Lactams. Med Res Rev 2017; 38:426-503. [DOI: 10.1002/med.21443] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 01/16/2017] [Accepted: 02/08/2017] [Indexed: 01/06/2023]
Affiliation(s)
- Lena Decuyper
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering; Ghent University; Ghent Belgium
| | - Marko Jukič
- Faculty of Pharmacy; University of Ljubljana; Ljubljana Slovenia
| | - Izidor Sosič
- Faculty of Pharmacy; University of Ljubljana; Ljubljana Slovenia
| | - Aleš Žula
- Faculty of Pharmacy; University of Ljubljana; Ljubljana Slovenia
| | - Matthias D'hooghe
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering; Ghent University; Ghent Belgium
| | - Stanislav Gobec
- Faculty of Pharmacy; University of Ljubljana; Ljubljana Slovenia
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60
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Cardoso MH, de Almeida KC, Cândido EDS, Murad AM, Dias SC, Franco OL. Comparative NanoUPLC-MS E analysis between magainin I-susceptible and -resistant Escherichia coli strains. Sci Rep 2017. [PMID: 28646205 PMCID: PMC5482854 DOI: 10.1038/s41598-017-04181-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
In recent years the antimicrobial peptides (AMPs) have been prospected and designed as new alternatives to conventional antibiotics. Indeed, AMPs have presented great potential toward pathogenic bacterial strains by means of complex mechanisms of action. However, reports have increasingly emerged regarding the mechanisms by which bacteria resist AMP administration. In this context, we performed a comparative proteomic study by using the total bacterial lysate of magainin I-susceptible and –resistant E. coli strains. After nanoUPLC-MSE analyses we identified 742 proteins distributed among the experimental groups, and 25 proteins were differentially expressed in the resistant strains. Among them 10 proteins involved in bacterial resistance, homeostasis, nutrition and protein transport were upregulated, while 15 proteins related to bacterial surface modifications, genetic information and β-lactams binding-protein were downregulated. Moreover, 60 exclusive proteins were identified in the resistant strains, among which biofilm and cell wall formation and multidrug efflux pump proteins could be observed. Thus, differentially from previous studies that could only associate single proteins to AMP bacterial resistance, data here reported show that several metabolic pathways may be related to E. coli resistance to AMPs, revealing the crucial role of multiple “omics” studies in order to elucidate the global molecular mechanisms involved in this resistance.
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Affiliation(s)
- Marlon H Cardoso
- Centro de Análises Proteômicas e Bioquímicas, Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília-DF, 70.790-160, Brazil.,Programa de Pós-Graduação em Patologia Molecular, Faculdade de Medicina, Universidade de Brasília, Brasília-DF, 70.910-900, Brazil.,S-Inova Biotech, Pós-graduação em Biotecnologia, Universidade Católica Dom Bosco, Campo Grande-MS, 79.117-900, Brazil
| | - Keyla C de Almeida
- Centro de Análises Proteômicas e Bioquímicas, Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília-DF, 70.790-160, Brazil.,Programa de Pós-Graduação em Patologia Molecular, Faculdade de Medicina, Universidade de Brasília, Brasília-DF, 70.910-900, Brazil
| | - Elizabete de S Cândido
- Centro de Análises Proteômicas e Bioquímicas, Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília-DF, 70.790-160, Brazil.,S-Inova Biotech, Pós-graduação em Biotecnologia, Universidade Católica Dom Bosco, Campo Grande-MS, 79.117-900, Brazil
| | - André M Murad
- Embrapa Recursos Genéticos e Biotecnologia, Laboratório de Biologia Sintética, Parque Estação Biológica, Brasília-DF, 70.770-917, Brazil
| | - Simoni C Dias
- Centro de Análises Proteômicas e Bioquímicas, Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília-DF, 70.790-160, Brazil
| | - Octávio L Franco
- Centro de Análises Proteômicas e Bioquímicas, Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília-DF, 70.790-160, Brazil. .,Programa de Pós-Graduação em Patologia Molecular, Faculdade de Medicina, Universidade de Brasília, Brasília-DF, 70.910-900, Brazil. .,S-Inova Biotech, Pós-graduação em Biotecnologia, Universidade Católica Dom Bosco, Campo Grande-MS, 79.117-900, Brazil.
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61
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Lewandowski EM, Szczupak Ł, Wong S, Skiba J, Guśpiel A, Solecka J, Vrček V, Kowalski K, Chen Y. Antibacterial Properties of Metallocenyl-7-ADCA Derivatives and Structure in Complex with CTX-M β-Lactamase. Organometallics 2017; 36:1673-1676. [PMID: 29051683 PMCID: PMC5642929 DOI: 10.1021/acs.organomet.6b00888] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A series of six novel metallocenyl-7-ADCA (metallocenyl = ferrocenyl or ruthenocenyl; 7-ADCA = 7-aminodesacetoxycephalosporanic acid) conjugates were synthesized and their antibacterial properties evaluated by biochemical and microbiological assays. The ruthenocene derivatives showed a higher level of inhibition of DD-carboxypeptidase 64-575, a Penicillin Binding Protein (PBP), than the ferrocene derivatives and the reference compound penicillin G. Protein X-ray crystallographic analysis revealed a covalent acyl-enzyme complex of a ruthenocenyl compound with CTX-M β-lactamase E166A mutant, corresponding to a similar complex with PBPs responsible for the bactericidal activities of these compounds. Most interestingly, an intact compound was captured at the crystal-packing interface, elucidating for the first time the structure of a metallocenyl β-lactam compound that previously eluded small molecule crystallography. We propose that protein crystals, even from biologically unrelated molecules, can be utilized to determine structures of small molecules.
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Affiliation(s)
- Eric M. Lewandowski
- Department of Molecular Medicine, University of South Florida Morsani College of Medicine, 12901 Bruce B. Downs Blvd., Tampa, Florida 33612, United States
| | - Łukasz Szczupak
- Department of Organic Chemistry, Faculty of Chemistry, University of Łódź, Tamka 12, PL-91403 Łódź, Poland
| | - Stephanie Wong
- Department of Molecular Medicine, University of South Florida Morsani College of Medicine, 12901 Bruce B. Downs Blvd., Tampa, Florida 33612, United States
| | - Joanna Skiba
- Department of Organic Chemistry, Faculty of Chemistry, University of Łódź, Tamka 12, PL-91403 Łódź, Poland
| | - Adam Guśpiel
- National Institute of Public Health-National Institute of Hygiene, Chocimska 24, PL-00791, Warsaw, Poland
| | - Jolanta Solecka
- National Institute of Public Health-National Institute of Hygiene, Chocimska 24, PL-00791, Warsaw, Poland
| | - Valerije Vrček
- Faculty of Pharmacy and Biochemistry, University of Zagreb, Ante Kovačića 1, Zagreb, Croatia
| | - Konrad Kowalski
- Department of Organic Chemistry, Faculty of Chemistry, University of Łódź, Tamka 12, PL-91403 Łódź, Poland
| | - Yu Chen
- Department of Molecular Medicine, University of South Florida Morsani College of Medicine, 12901 Bruce B. Downs Blvd., Tampa, Florida 33612, United States
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Magalhães S, Aroso M, Roxo I, Ferreira S, Cerveira F, Ramalheira E, Ferreira R, Vitorino R. Proteomic profile of susceptible and multidrug-resistant clinical isolates of Escherichia coli and Klebsiella pneumoniae using label-free and immunoproteomic strategies. Res Microbiol 2016; 168:222-233. [PMID: 28040467 DOI: 10.1016/j.resmic.2016.12.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 11/12/2016] [Accepted: 12/18/2016] [Indexed: 01/13/2023]
Abstract
Infectious diseases caused by multidrug-resistant (MDR) Enterobacteriaceae have exponentially increased in the past decade, and are a major concern in hospitals. In the first part of the work, we compared the proteome profile of MDR and susceptible clinical isolates of Escherichia coli and Klebsiella pneumoniae in order to identify possible biological processes associated with drug resistance and susceptible phenotypes, using a label-free approach. In the second part, we used an immunoproteomics approach to identify immunoreactive proteins in the same isolates. A total of 388 and 377 proteins were identified in MDR and susceptible E. coli, respectively, evidencing that biological processes related to translation are upregulated in E. coli MDR, while there is an upregulation of processes related to catalytic activity in K. pneumoniae MDR. Both MDR strains show downregulation of processes related to amino acid activation and tRNA amino-acylation. Our data also suggest that MDR strains have higher immunoreactivity than the susceptible strains. The application of high-throughput mass spectrometry (MS) and bioinformatics to the study of modulation of biological processes might shed light on the characterization of multidrug resistance in bacteria.
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Affiliation(s)
- Sandra Magalhães
- QOPNA, Mass Spectrometry Center, Department of Chemistry, University of Aveiro, Aveiro, Portugal; iBiMED - Institute for Biomedicine, University of Aveiro, Aveiro, Portugal
| | - Miguel Aroso
- iBiMED - Institute for Biomedicine, University of Aveiro, Aveiro, Portugal
| | - Inês Roxo
- Clinical Pathology, Centro Hospitalar do Baixo Vouga, Oliveira do Bairro, Portugal
| | - Sónia Ferreira
- Clinical Pathology, Centro Hospitalar do Baixo Vouga, Oliveira do Bairro, Portugal; Institute of Education and Citizenship, Oliveira do Bairro, Portugal
| | - Frederico Cerveira
- Clinical Pathology, Centro Hospitalar do Baixo Vouga, Oliveira do Bairro, Portugal
| | - Elmano Ramalheira
- Clinical Pathology, Centro Hospitalar do Baixo Vouga, Oliveira do Bairro, Portugal
| | - Rita Ferreira
- QOPNA, Mass Spectrometry Center, Department of Chemistry, University of Aveiro, Aveiro, Portugal
| | - Rui Vitorino
- iBiMED - Institute for Biomedicine, University of Aveiro, Aveiro, Portugal; Department of Physiology and Cardiothoracic Surgery, Faculty of Medicine, University of Porto, Porto, Portugal.
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63
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Cortina GA, Kasson PM. Excess positional mutual information predicts both local and allosteric mutations affecting beta lactamase drug resistance. Bioinformatics 2016; 32:3420-3427. [PMID: 27466622 PMCID: PMC6078173 DOI: 10.1093/bioinformatics/btw492] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 06/30/2016] [Accepted: 07/18/2016] [Indexed: 11/14/2022] Open
Abstract
MOTIVATION Bacterial resistance to antibiotics, particularly plasmid-encoded resistance to beta lactam drugs, poses an increasing threat to human health. Point mutations to beta-lactamase enzymes can greatly alter the level of resistance conferred, but predicting the effects of such mutations has been challenging due to the large combinatorial space involved and the subtle relationships of distant residues to catalytic function. Therefore we desire an information-theoretic metric to sensitively and robustly detect both local and distant residues that affect substrate conformation and catalytic activity. RESULTS Here, we report the use of positional mutual information in multiple microsecond-length molecular dynamics (MD) simulations to predict residues linked to catalytic activity of the CTX-M9 beta lactamase. We find that motions of the bound drug are relatively isolated from motions of the protein as a whole, which we interpret in the context of prior theories of catalysis. In order to robustly identify residues that are weakly coupled to drug motions but nonetheless affect catalysis, we utilize an excess mutual information metric. We predict 31 such residues for the cephalosporin antibiotic cefotaxime. Nine of these have previously been tested experimentally, and all decrease both enzyme rate constants and empirical drug resistance. We prospectively validate our method by testing eight high-scoring mutations and eight low-scoring controls in bacteria. Six of eight predicted mutations decrease cefotaxime resistance greater than 2-fold, while only one control shows such an effect. The ability to prospectively predict new variants affecting bacterial drug resistance is of great interest to clinical and epidemiological surveillance. AVAILABILITY AND IMPLEMENTATION Excess mutual information code is available at https://github.com/kassonlab/positionalmi CONTACT: kasson@virginia.edu.
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Affiliation(s)
- George A Cortina
- Departments of Biomedical Engineering and Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, VA 22908, USA
| | - Peter M Kasson
- Departments of Biomedical Engineering and Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, VA 22908, USA
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64
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Crystal Structure of the Metallo-β-Lactamase GOB in the Periplasmic Dizinc Form Reveals an Unusual Metal Site. Antimicrob Agents Chemother 2016; 60:6013-22. [PMID: 27458232 DOI: 10.1128/aac.01067-16] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Accepted: 07/17/2016] [Indexed: 11/20/2022] Open
Abstract
Metallo-beta-lactamases (MBLs) are broad-spectrum, Zn(II)-dependent lactamases able to confer resistance to virtually every β-lactam antibiotic currently available. The large diversity of active-site structures and metal content among MBLs from different sources has limited the design of a pan-MBL inhibitor. GOB-18 is a divergent MBL from subclass B3 that is expressed by the opportunistic Gram-negative pathogen Elizabethkingia meningoseptica This MBL is atypical, since several residues conserved in B3 enzymes (such as a metal ligand His) are substituted in GOB enzymes. Here, we report the crystal structure of the periplasmic di-Zn(II) form of GOB-18. This enzyme displays a unique active-site structure, with residue Gln116 coordinating the Zn1 ion through its terminal amide moiety, replacing a ubiquitous His residue. This situation contrasts with that of B2 MBLs, where an equivalent His116Asn substitution leads to a di-Zn(II) inactive species. Instead, both the mono- and di-Zn(II) forms of GOB-18 are active against penicillins, cephalosporins, and carbapenems. In silico docking and molecular dynamics simulations indicate that residue Met221 is not involved in substrate binding, in contrast to Ser221, which otherwise is conserved in most B3 enzymes. These distinctive features are conserved in recently reported GOB orthologues in environmental bacteria. These findings provide valuable information for inhibitor design and also posit that GOB enzymes have alternative functions.
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Raf-kinase inhibitor GW5074 shows antibacterial activity against methicillin-resistant Staphylococcus aureus and potentiates the activity of gentamicin. Future Med Chem 2016; 8:1941-1952. [PMID: 27652456 DOI: 10.4155/fmc-2016-0104] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
AIM Increasing antimicrobial resistance has compromised the effectiveness of many antibiotics, including those used to treat staphylococcal infections like methicillin-resistant Staphylococcus aureus. The development of combination therapies, where antimicrobial agents are used with compounds that inhibit resistance pathways is a promising strategy. Results/methodology: The Raf kinase inhibitor GW5074 exhibited selective in vitro activity against Gram-positive bacteria, including clinical isolates of S. aureus with a minimum inhibitory concentration (MIC) of 2-8 µg/ml. GW5074 was effective in vivo in the Galleria mellonella infection model. The compound showed synergy with gentamicin by lowering MIC by fourfold, compared with gentamicin MIC alone. CONCLUSION This work demonstrates the antimicrobial properties of GW5074 and supports further investigation of the kinase inhibitors as antibiotic adjuvants.
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In Vitro and In Vivo Synergy of the Oxadiazole Class of Antibacterials with β-Lactams. Antimicrob Agents Chemother 2016; 60:5581-8. [PMID: 27401567 DOI: 10.1128/aac.00787-16] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 07/05/2016] [Indexed: 02/02/2023] Open
Abstract
The oxadiazole antibacterials target the bacterial cell wall and are bactericidal. We investigated the synergism of ND-421 with the commonly used β-lactams and non-β-lactam antibiotics by the checkerboard method and by time-kill assays. ND-421 synergizes well with β-lactam antibiotics, and it also exhibits a long postantibiotic effect (4.7 h). We also evaluated the in vivo efficacy of ND-421 in a murine neutropenic thigh infection model alone and in combination with oxacillin. ND-421 has in vivo efficacy by itself in a clinically relevant infection model (1.49 log10 bacterial reduction for ND-321 versus 0.36 log10 for linezolid with NRS119) and acts synergistically with β-lactam antibiotics in vitro and in vivo, and the combination of ND-421 with oxacillin is efficacious in a mouse neutropenic thigh methicillin-resistant Staphylococcus aureus (MRSA) infection model (1.60 log10 bacterial reduction). The activity of oxacillin was potentiated in the presence of ND-421, as the strain would have been resistant to oxacillin otherwise.
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Patzelt C, Pöthig A, Gulder T. Iodine(III)-Catalyzed Cascade Reactions Enabling a Direct Access to β-Lactams and α-Hydroxy-β-amino Acids. Org Lett 2016; 18:3466-9. [DOI: 10.1021/acs.orglett.6b01658] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christoph Patzelt
- Department of Chemistry and
Catalysis Research Center (CRC), Technical University of Munich, Lichtenbergstrasse 4, 85747 Garching, Germany
| | - Alexander Pöthig
- Department of Chemistry and
Catalysis Research Center (CRC), Technical University of Munich, Lichtenbergstrasse 4, 85747 Garching, Germany
| | - Tanja Gulder
- Department of Chemistry and
Catalysis Research Center (CRC), Technical University of Munich, Lichtenbergstrasse 4, 85747 Garching, Germany
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Janardhanan J, Chang M, Mobashery S. The oxadiazole antibacterials. Curr Opin Microbiol 2016; 33:13-17. [PMID: 27239942 DOI: 10.1016/j.mib.2016.05.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 05/09/2016] [Accepted: 05/11/2016] [Indexed: 01/22/2023]
Abstract
The oxadiazoles are a class of antibacterials discovered by in silico docking and scoring of compounds against the X-ray structure of a penicillin-binding protein. These antibacterials exhibit activity against Gram-positive bacteria, including against methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant Enterococcus (VRE). They show in vivo efficacy in murine models of peritonitis/sepsis and neutropenic thigh MRSA infection. They are bactericidal and orally bioavailable. The oxadiazoles show promise in treatment of MRSA infection.
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Affiliation(s)
- Jeshina Janardhanan
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, United States
| | - Mayland Chang
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, United States.
| | - Shahriar Mobashery
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, United States.
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Affiliation(s)
- R. F. Pratt
- Department
of Chemistry, Wesleyan University, Lawn Avenue, Middletown, Connecticut 06459, United States
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70
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Meini MR, Llarrull LI, Vila AJ. Evolution of Metallo-β-lactamases: Trends Revealed by Natural Diversity and in vitro Evolution. Antibiotics (Basel) 2016; 3:285-316. [PMID: 25364574 PMCID: PMC4212336 DOI: 10.3390/antibiotics3030285] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The production of β-lactamase enzymes is one of the most distributed resistance mechanisms towards β-lactam antibiotics. Metallo-β-lactamases constitute a worrisome group of these kinds of enzymes, since they present a broad spectrum profile, being able to hydrolyze not only penicillins, but also the latest generation of cephalosporins and carbapenems, which constitute at present the last resource antibiotics. The VIM, IMP, and NDM enzymes comprise the main groups of clinically relevant metallo-β-lactamases. Here we present an update of the features of the natural variants that have emerged and of the ones that have been engineered in the laboratory, in an effort to find sequence and structural determinants of substrate preferences. This knowledge is of upmost importance in novel drug design efforts. We also discuss the advances in knowledge achieved by means of in vitro directed evolution experiments, and the potential of this approach to predict natural evolution of metallo-β-lactamases.
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Affiliation(s)
- María-Rocío Meini
- Authors to whom correspondence should be addressed; E-Mails: (M.-R.M.); (L.I.L.); (A.J.V.); Tel.: +54-341-423-7070 (ext. 611 M.-R.M.; 637 L.I.L.; 632 A.J.V.); Fax: 54-341-423-7070 (ext. 607)
| | - Leticia I. Llarrull
- Authors to whom correspondence should be addressed; E-Mails: (M.-R.M.); (L.I.L.); (A.J.V.); Tel.: +54-341-423-7070 (ext. 611 M.-R.M.; 637 L.I.L.; 632 A.J.V.); Fax: 54-341-423-7070 (ext. 607)
| | - Alejandro J. Vila
- Authors to whom correspondence should be addressed; E-Mails: (M.-R.M.); (L.I.L.); (A.J.V.); Tel.: +54-341-423-7070 (ext. 611 M.-R.M.; 637 L.I.L.; 632 A.J.V.); Fax: 54-341-423-7070 (ext. 607)
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71
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Matsumoto Y, Yasukawa J, Ishii M, Hayashi Y, Miyazaki S, Sekimizu K. A critical role of mevalonate for peptidoglycan synthesis in Staphylococcus aureus. Sci Rep 2016; 6:22894. [PMID: 26961421 PMCID: PMC4790635 DOI: 10.1038/srep22894] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Accepted: 02/23/2016] [Indexed: 11/16/2022] Open
Abstract
3-hydroxy-3-methyl-glutaryl-CoA (HMG-CoA) reductase, a mevalonate synthetase, is required for the growth of Staphylococcus aureus. However, the essential role of the enzyme in cell growth has remained unclear. Here we show that three mutants possessed single-base substitutions in the mvaA gene, which encodes HMG-CoA reductase, show a temperature-sensitive phenotype. The phenotype was suppressed by the addition of mevalonate or farnesyl diphosphate, which is a product synthesized from mevalonate. Farnesyl diphosphate is a precursor of undecaprenyl phosphate that is required for peptidoglycan synthesis. The rate of peptidoglycan synthesis was decreased in the mvaA mutants under the non-permissive conditions and the phenotype was suppressed by the addition of mevalonate. HMG-CoA reductase activities of mutant MvaA proteins in the temperature sensitive mutants were lower than that of wild-type MvaA protein. Our findings from genetic and biochemical analyses suggest that mevalonate produced by HMG-CoA reductase is required for peptidoglycan synthesis for S. aureus cell growth.
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Affiliation(s)
- Yasuhiko Matsumoto
- Laboratory of Microbiology, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 111-0033, Japan
| | - Jyunichiro Yasukawa
- Laboratory of Microbiology, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 111-0033, Japan
| | - Masaki Ishii
- Laboratory of Microbiology, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 111-0033, Japan
| | - Yohei Hayashi
- Laboratory of Microbiology, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 111-0033, Japan
| | - Shinya Miyazaki
- Laboratory of Microbiology, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 111-0033, Japan
| | - Kazuhisa Sekimizu
- Laboratory of Microbiology, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 111-0033, Japan
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Ramirez-Malule H, Restrepo A, Cardona W, Junne S, Neubauer P, Rios-Estepa R. Inversion of the stereochemical configuration (3S, 5S)-clavaminic acid into (3R, 5R)-clavulanic acid: A computationally-assisted approach based on experimental evidence. J Theor Biol 2016; 395:40-50. [PMID: 26835563 DOI: 10.1016/j.jtbi.2016.01.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 01/19/2016] [Accepted: 01/21/2016] [Indexed: 11/17/2022]
Abstract
Clavulanic acid (CA), a potent inhibitor of β-lactamase enzymes, is produced by Streptomyces clavuligerus (Sc) cultivation processes, for which low yields are commonly obtained. Improved knowledge of the clavam biosynthetic pathway, especially the steps involved in the inversion of 3S-5S into 3R-5R stereochemical configuration, would help to eventually identify bottlenecks in the pathway. In this work, we studied the role of acetate in CA biosynthesis by a combined continuous culture and computational simulation approach. From this we derived a new model for the synthesis of N-acetyl-glycyl-clavaminic acid (NAG-clavam) by Sc. Acetylated compounds, such as NAG-clavam and N-acetyl-clavaminic acid, have been reported in the clavam pathway. Although the acetyl group is present in the β-lactam intermediate NAG-clavam, it is unknown how this group is incorporated. Hence, under the consideration of the experimentally proven accumulation of acetate during CA biosynthesis, and the fact that an acetyl group is present in the NAG-clavam structure, a computational evaluation of the tentative formation of NAG-clavam was performed for the purpose of providing further understanding. The proposed reaction mechanism consists of two steps: first, acetate reacts with ATP to produce a reactive acylphosphate intermediate; second, a direct nucleophilic attack of the terminal amino group of N-glycyl-clavaminic on the carbonyl carbon of the acylphosphate intermediate leads to a tetrahydral intermediate, which collapses and produces ADP and N-acetyl-glycyl-clavaminic acid. The calculations suggest that for the proposed reaction mechanism, the reaction proceeds until completion of the first step, without the direct action of an enzyme, where acetate and ATP are involved. For this step, the computed activation energy was ≅2.82kcal/mol while the reaction energy was ≅2.38kcal/mol. As this is an endothermic chemical process with a relatively small activation energy, the reaction rate should be considerably high. The calculations offered in this work should not be considered as a definite characterization of the potential energy surface for the reaction between acetate and ATP, but rather as a first approximation that provides valuable insight about the reaction mechanism. Finally, a complete route for the inversion of the stereochemical configuration from (3S, 5S)-clavaminic acid into (3R, 5R)-clavulanic acid is proposed, including a novel alternative for the double epimerization using proline racemase and NAG-clavam formation.
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Affiliation(s)
- Howard Ramirez-Malule
- Grupo de Bioprocesos, Departamento de Ingeniería Química, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia
| | - Albeiro Restrepo
- Grupo de Química Física Teórica, Instituto de Química, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia
| | - Wilson Cardona
- Grupo de Química de Plantas Colombianas, Instituto de Química, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia
| | - Stefan Junne
- Chair of Bioprocess Engineering, Department of Biotechnology, Technische Universität Berlin, Ackerstr. 76, ACK 24, 13355 Berlin, Germany
| | - Peter Neubauer
- Chair of Bioprocess Engineering, Department of Biotechnology, Technische Universität Berlin, Ackerstr. 76, ACK 24, 13355 Berlin, Germany
| | - Rigoberto Rios-Estepa
- Grupo de Bioprocesos, Departamento de Ingeniería Química, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia.
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Kumar Y, Singh P, Bhargava G. Cu(i) mediated Kinugasa reactions of α,β-unsaturated nitrones: a facile, diastereoselective route to 3-(hydroxy/bromo)methyl-1-aryl-4-(-styryl)azetidin-2-ones. NEW J CHEM 2016. [DOI: 10.1039/c6nj01747a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A facile and highly diastereoselective synthesis ofcis-3-(hydroxyl/bromo)methyl-1-aryl-4-(-styryl)azetidin-2-onesviacopper(i) mediated Kinugasa reactions of previously unexplored functionalized α,β-unsaturated nitrones.
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Affiliation(s)
- Yogesh Kumar
- I. K. Gujral Punjab Technical University
- Kapurthala
- India
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74
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Ramirez-Malule H, Junne S, López C, Zapata J, Sáez A, Neubauer P, Rios-Estepa R. An improved HPLC-DAD method for clavulanic acid quantification in fermentation broths of Streptomyces clavuligerus. J Pharm Biomed Anal 2015; 120:241-7. [PMID: 26760242 DOI: 10.1016/j.jpba.2015.12.035] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 12/15/2015] [Accepted: 12/16/2015] [Indexed: 10/22/2022]
Abstract
Clavulanic acid (CA) is an important secondary metabolite commercially produced by cultivation of Streptomyces clavuligerus (Sc). It is a potent inhibitor of bacterial β-lactamases. In this work, a specific and improved high performance liquid chromatography (HPLC) method, using a C-18 reversed phase column, diode array detector and gradient elution for CA quantification in fermentation broths of Sc, was developed and successfully validated. Samples were imidazole-derivatized for the purpose of creating a stable chromophore (clavulanate-imidazole). The calibration curve was linear over a typical range of CA concentration between 0.2 and 400mg/L. The detection and quantification limits were 0.01 and 0.02mg/L, respectively. The precision of the method was evaluated for CA spiked into production media and a recovery of 103.8%, on average, was obtained. The clavulanate-imidazole complex was not stable when the samples were not cooled during the analysis. The recovery rate was 39.3% on average. This assay was successfully tested for CA quantification in samples from Sc fermentation, using both, a chemically defined and a complex medium.
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Affiliation(s)
- Howard Ramirez-Malule
- Grupo de Bioprocesos, Departamento de Ingeniería Química, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia
| | - Stefan Junne
- Chair of Bioprocess Engineering, Department of Biotechnology, Technische Universität Berlin, Ackerstr. 76, ACK 24, D-13355 Berlin, Germany
| | - Carlos López
- Laboratorio de Análisis de Residuos, Instituto de Química, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia
| | - Julian Zapata
- Laboratorio de Análisis de Residuos, Instituto de Química, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia
| | - Alex Sáez
- Grupo CIBIOP, Escuela de Ciencias, Universidad EAFIT, Carrera 49 No. 7 sur-50, Medellín, Colombia
| | - Peter Neubauer
- Chair of Bioprocess Engineering, Department of Biotechnology, Technische Universität Berlin, Ackerstr. 76, ACK 24, D-13355 Berlin, Germany
| | - Rigoberto Rios-Estepa
- Grupo de Bioprocesos, Departamento de Ingeniería Química, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia.
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Novel Penicillin-Type Analogues Bearing a Variable Substituted 2-Azetidinone Ring at Position 6: Synthesis and Biological Evaluation. Molecules 2015; 20:22044-57. [PMID: 26690391 PMCID: PMC6332199 DOI: 10.3390/molecules201219828] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 11/20/2015] [Accepted: 12/02/2015] [Indexed: 11/16/2022] Open
Abstract
The synthesis and the biological activity of novel semi-synthetic β-lactam compounds containing an azetidinone moiety joined to the amino-nitrogen of the (+)-6-aminopenicillanic acid (6-APA) as new antibacterial agents is reported. The synthesized compounds were screened for their in vitro antimicrobial activity against a panel of Gram positive and Gram negative pathogens and environmental bacteria. Tested compounds displayed good antimicrobial activity against all tested Gram positive bacteria and for Staphylococcus aureus and Staphylococcus epidermidis antimicrobial activity resulted higher than that of the reference antibiotic. Additionally, in vitro cytotoxic screening was also carried out indicating that the compounds do not cause a cell vitality reduction effective at concentration next to and above those shown to be antimicrobial.
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76
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Lewandowski EM, Skiba J, Torelli NJ, Rajnisz A, Solecka J, Kowalski K, Chen Y. Antibacterial properties and atomic resolution X-ray complex crystal structure of a ruthenocene conjugated β-lactam antibiotic. Chem Commun (Camb) 2015; 51:6186-9. [PMID: 25753149 DOI: 10.1039/c5cc00904a] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
We have determined a 1.18 Å resolution X-ray crystal structure of a novel ruthenocenyle-6-aminopenicillinic acid in complex with CTX-M β-lactamase, showing unprecedented details of interactions between ruthenocene and protein. As the first product complex with an intact catalytic serine, the structure also offers insights into β-lactamase catalysis and inhibitor design.
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Affiliation(s)
- Eric M Lewandowski
- Department of Molecular Medicine, University of South Florida, Tampa, Florida 33612, USA.
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Majewski MW, Watson KD, Cho S, Miller PA, Franzblau SG, Miller MJ. Syntheses and Biological Evaluations of Highly Functionalized Hydroxamate Containing and N-Methylthio Monobactams as Anti-Tuberculosis and β-Lactamase Inhibitory Agents. MEDCHEMCOMM 2015; 7:141-147. [PMID: 26918106 DOI: 10.1039/c5md00340g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Both the resurgence of tuberculosis (TB) and antibiotic resistance continue to threaten modern healthcare and new means of combating pathogenic bacterial infections are needed. The syntheses of monobactams possessing hydroxamate and N-methylthio functionality are described, as well as their anti-TB, in vitro β-lactamase inhibitory, and general antimicrobial evaluations. A number of compounds exhibited significant anti-TB and β-lactamase inhibitory activity, with MIC values in the range of 25 to < 0.19 μM against Mycobacteria tuberculosis (M.tb), and Ki values in the range of 25-0.03 μM against purified NDM-1 and VIM-1 lystate metallo β-lactamases. This work suggests that these scaffolds may serve as promising leads in developing new antibiotics and/or β-lactamase inhibitors.
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Affiliation(s)
- Mark W Majewski
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Kyle D Watson
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Sanghyun Cho
- Institute for Tuberculosis Research, College of Pharmacy, MIC 964, Rm. 412, University of Illinois at Chicago, IL, 60612, USA
| | - Patricia A Miller
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Scott G Franzblau
- Institute for Tuberculosis Research, College of Pharmacy, MIC 964, Rm. 412, University of Illinois at Chicago, IL, 60612, USA
| | - Marvin J Miller
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, 46556, USA
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McKinney DC, Zhou F, Eyermann CJ, Ferguson AD, Prince DB, Breen J, Giacobbe RA, Lahiri S, Verheijen JC. 4,5-Disubstituted 6-Aryloxy-1,3-dihydrobenzo[c][1,2]oxaboroles Are Broad-Spectrum Serine β-Lactamase Inhibitors. ACS Infect Dis 2015; 1:310-6. [PMID: 27622821 DOI: 10.1021/acsinfecdis.5b00031] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Bacterially expressed β-lactamases are rapidly eroding the clinical utility of the important β-lactam class of antibacterials, significantly impairing our ability to fight serious bacterial infections. This paper describes a study of oxaborole-derived β-lactamase inhibitors in which crystal structures and computational modeling aided in the rational design of analogues with improved spectrum of activity against class A, C, and D enzymes. Crystal structures of two of these inhibitors covalently bound to two different serine β-lactamases, class C Pseudomonas aeruginosa AmpC and class D OXA-10, are described herein. Improved physicochemical properties as well as increased activity against an array of β-lactamases resulted in substantial restoration of susceptibility to ceftazidime in Escherichia coli and Klebsiella pneumoniae.
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Affiliation(s)
- David C. McKinney
- Infection Innovative Medicines, AstraZeneca R&D Boston, 35 Gatehouse Drive, Waltham Massachusetts 02451, United States
| | - Fei Zhou
- Infection Innovative Medicines, AstraZeneca R&D Boston, 35 Gatehouse Drive, Waltham Massachusetts 02451, United States
| | - Charles J. Eyermann
- Infection Innovative Medicines, AstraZeneca R&D Boston, 35 Gatehouse Drive, Waltham Massachusetts 02451, United States
| | | | | | | | - Robert A. Giacobbe
- Infection Innovative Medicines, AstraZeneca R&D Boston, 35 Gatehouse Drive, Waltham Massachusetts 02451, United States
| | - Sushmita Lahiri
- Infection Innovative Medicines, AstraZeneca R&D Boston, 35 Gatehouse Drive, Waltham Massachusetts 02451, United States
| | - Jeroen C. Verheijen
- Infection Innovative Medicines, AstraZeneca R&D Boston, 35 Gatehouse Drive, Waltham Massachusetts 02451, United States
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79
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Yada A, Okajima S, Murakami M. Palladium-Catalyzed Intramolecular Insertion of Alkenes into the Carbon-Nitrogen Bond of β-Lactams. J Am Chem Soc 2015; 137:8708-11. [PMID: 26119993 DOI: 10.1021/jacs.5b05308] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The carbon-nitrogen bond of β-lactams is cleaved by palladium(0), and an alkene is intramolecularly inserted therein. The following reductive elimination produces nitrogen-containing benzo-fused tricycles in good to high yields.
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Affiliation(s)
- Akira Yada
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Satoshi Okajima
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto 615-8510, Japan
| | - Masahiro Murakami
- Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto 615-8510, Japan
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80
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Diastereoselective synthesis of a hydroxamate containing bicyclo-[3.2.0] β-lactam aminal via ruthenium alkene isomerization and Pd(II)-catalyzed oxidative amidation. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2014.12.072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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81
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Ma J, Cao Q, McLeod SM, Ferguson K, Gao N, Breeze AL, Hu J. Target-based whole-cell screening by ¹H NMR spectroscopy. Angew Chem Int Ed Engl 2015; 54:4764-7. [PMID: 25693499 PMCID: PMC4471574 DOI: 10.1002/anie.201410701] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Revised: 01/09/2015] [Indexed: 11/05/2022]
Abstract
An NMR-based approach marries the two traditional screening technologies (phenotypic and target-based screening) to find compounds inhibiting a specific enzymatic reaction in bacterial cells. Building on a previous study in which it was demonstrated that hydrolytic decomposition of meropenem in living Escherichia coli cells carrying New Delhi metallo-β-lactamase subclass 1 (NDM-1) can be monitored in real time by NMR spectroscopy, we designed a cell-based NMR screening platform. A strong NDM-1 inhibitor was identified with cellular IC50 of 0.51 μM, which is over 300-fold more potent than captopril, a known NDM-1 inhibitor. This new screening approach has great potential to be applied to targets in other cell types, such as mammalian cells, and to targets that are only stable or functionally competent in the cellular environment.
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Affiliation(s)
- Junhe Ma
- Discovery Sciences, AstraZeneca R&D BostonWaltham, Massachusetts 02451 (USA)
| | - Qing Cao
- Discovery Sciences, AstraZeneca R&D BostonWaltham, Massachusetts 02451 (USA)
| | - Sarah M McLeod
- Infection Innovative Medicines, AstraZeneca R&D BostonWaltham, Massachusetts 02451 (USA)
| | - Keith Ferguson
- Infection Innovative Medicines, AstraZeneca R&D BostonWaltham, Massachusetts 02451 (USA)
| | - Ning Gao
- Discovery Sciences, AstraZeneca R&D BostonWaltham, Massachusetts 02451 (USA)
| | - Alexander L Breeze
- Discovery Sciences, AstraZeneca R&D, Alderley ParkMacclesfield, Cheshire, SK10 4TG (UK)
- Astbury Centre for Structural Molecular Biology, Faculty of Biological Sciences, University of LeedsLeeds, LS2 9JT (UK)
| | - Jun Hu
- Discovery Sciences, AstraZeneca R&D BostonWaltham, Massachusetts 02451 (USA)
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82
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Murphy-Benenato KE, Bhagunde PR, Chen A, Davis HE, Durand-Réville TF, Ehmann DE, Galullo V, Harris JJ, Hatoum-Mokdad H, Jahić H, Kim A, Manjunatha MR, Manyak EL, Mueller J, Patey S, Quiroga O, Rooney M, Sha L, Shapiro AB, Sylvester M, Tan B, Tsai AS, Uria-Nickelsen M, Wu Y, Zambrowski M, Zhao SX. Discovery of Efficacious Pseudomonas aeruginosa-Targeted Siderophore-Conjugated Monocarbams by Application of a Semi-mechanistic Pharmacokinetic/Pharmacodynamic Model. J Med Chem 2015; 58:2195-205. [DOI: 10.1021/jm501506f] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | - M. R. Manjunatha
- Infection
Innovative Medicines, AstraZeneca India Pvt. Ltd., Bellary Road, Bangalore 560024, India
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83
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Ma J, Cao Q, McLeod SM, Ferguson K, Gao N, Breeze AL, Hu J. Target-Based Whole-Cell Screening by1H NMR Spectroscopy. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201410701] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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84
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Santoro S, Liao RZ, Marcelli T, Hammar P, Himo F. Theoretical Study of Mechanism and Stereoselectivity of Catalytic Kinugasa Reaction. J Org Chem 2015; 80:2649-60. [DOI: 10.1021/jo502838p] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Stefano Santoro
- Department
of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106
91 Stockholm, Sweden
| | - Rong-Zhen Liao
- Department
of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106
91 Stockholm, Sweden
| | - Tommaso Marcelli
- Department
of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106
91 Stockholm, Sweden
| | - Peter Hammar
- Department
of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106
91 Stockholm, Sweden
| | - Fahmi Himo
- Department
of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106
91 Stockholm, Sweden
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85
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Bouley R, Kumarasiri M, Peng Z, Otero LH, Song W, Suckow MA, Schroeder VA, Wolter WR, Lastochkin E, Antunes NT, Pi H, Vakulenko S, Hermoso JA, Chang M, Mobashery S. Discovery of antibiotic (E)-3-(3-carboxyphenyl)-2-(4-cyanostyryl)quinazolin-4(3H)-one. J Am Chem Soc 2015; 137:1738-41. [PMID: 25629446 DOI: 10.1021/jacs.5b00056] [Citation(s) in RCA: 99] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In the face of the clinical challenge posed by resistant bacteria, the present needs for novel classes of antibiotics are genuine. In silico docking and screening, followed by chemical synthesis of a library of quinazolinones, led to the discovery of (E)-3-(3-carboxyphenyl)-2-(4-cyanostyryl)quinazolin-4(3H)-one (compound 2) as an antibiotic effective in vivo against methicillin-resistant Staphylococcus aureus (MRSA). This antibiotic impairs cell-wall biosynthesis as documented by functional assays, showing binding of 2 to penicillin-binding protein (PBP) 2a. We document that the antibiotic also inhibits PBP1 of S. aureus, indicating a broad targeting of structurally similar PBPs by this antibiotic. This class of antibiotics holds promise in fighting MRSA infections.
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Affiliation(s)
- Renee Bouley
- Department of Chemistry and Biochemistry, University of Notre Dame , Notre Dame, Indiana 46556, United States
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86
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Spink E, Ding D, Peng Z, Boudreau MA, Leemans E, Lastochkin E, Song W, Lichtenwalter K, O'Daniel PI, Testero SA, Pi H, Schroeder VA, Wolter WR, Antunes NT, Suckow MA, Vakulenko S, Chang M, Mobashery S. Structure-activity relationship for the oxadiazole class of antibiotics. J Med Chem 2015; 58:1380-9. [PMID: 25590813 DOI: 10.1021/jm501661f] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The structure-activity relationship (SAR) for the newly discovered oxadiazole class of antibiotics is described with evaluation of 120 derivatives of the lead structure. This class of antibiotics was discovered by in silico docking and scoring against the crystal structure of a penicillin-binding protein. They impair cell-wall biosynthesis and exhibit activities against the Gram-positive bacterium Staphylococcus aureus, including methicillin-resistant S. aureus (MRSA) and vancomycin-resistant and linezolid-resistant S. aureus. 5-(1H-Indol-5-yl)-3-(4-(4-(trifluoromethyl)phenoxy)phenyl)-1,2,4-oxadiazole (antibiotic 75b) was efficacious in a mouse model of MRSA infection, exhibiting a long half-life, a high volume of distribution, and low clearance. This antibiotic is bactericidal and is orally bioavailable in mice. This class of antibiotics holds great promise in recourse against infections by MRSA.
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Affiliation(s)
- Edward Spink
- Department of Chemistry and Biochemistry, University of Notre Dame , Notre Dame, Indiana 46556, United States
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87
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Boggián DB, Cornier PG, Mata EG, Blank VC, Cárdenas MG, Roguin LP. A solid- and solution-phase-based library of 2β-methyl substituted penicillin derivatives and their effects on growth inhibition of tumor cell lines. MEDCHEMCOMM 2015. [DOI: 10.1039/c4md00430b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We described the design, synthesis and antiproliferative properties of a series of twenty 2β-methyl substituted penicillin derivatives.
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Affiliation(s)
- Dora B. Boggián
- Instituto de Química Rosario (CONICET – UNR)
- Facultad de Ciencias Bioquímicas y Farmacéuticas
- Universidad Nacional de Rosario
- Suipacha 531
- 2000 Rosario
| | - Patricia G. Cornier
- Instituto de Química Rosario (CONICET – UNR)
- Facultad de Ciencias Bioquímicas y Farmacéuticas
- Universidad Nacional de Rosario
- Suipacha 531
- 2000 Rosario
| | - Ernesto G. Mata
- Instituto de Química Rosario (CONICET – UNR)
- Facultad de Ciencias Bioquímicas y Farmacéuticas
- Universidad Nacional de Rosario
- Suipacha 531
- 2000 Rosario
| | - Viviana C. Blank
- Instituto de Química y Fisicoquímica Biológicas (UBA – CONICET)
- Facultad de Farmacia y Bioquímica. Universidad de Buenos Aires
- Junín 956
- Argentina
| | - Mariano G. Cárdenas
- Instituto de Química y Fisicoquímica Biológicas (UBA – CONICET)
- Facultad de Farmacia y Bioquímica. Universidad de Buenos Aires
- Junín 956
- Argentina
| | - Leonor P. Roguin
- Instituto de Química y Fisicoquímica Biológicas (UBA – CONICET)
- Facultad de Farmacia y Bioquímica. Universidad de Buenos Aires
- Junín 956
- Argentina
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88
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Tran QT, Pearlstein RA, Williams S, Reilly J, Krucker T, Erdemli G. Structure-kinetic relationship of carbapenem antibacterials permeating throughE. coliOmpC porin. Proteins 2014; 82:2998-3012. [DOI: 10.1002/prot.24659] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 06/24/2014] [Accepted: 07/21/2014] [Indexed: 11/08/2022]
Affiliation(s)
- Que-Tien Tran
- Center for Proteomic Chemistry; Novartis Institutes for BioMedical Research; Cambridge Massachusetts 02139
| | - Robert A. Pearlstein
- Global Discovery Chemistry; Novartis Institutes for BioMedical Research; Cambridge Massachusetts 02139
| | - Sarah Williams
- Global Discovery Chemistry; Novartis Institutes for BioMedical Research; Cambridge Massachusetts 02139
| | - John Reilly
- Global Discovery Chemistry; Novartis Institutes for BioMedical Research; Cambridge Massachusetts 02139
| | - Thomas Krucker
- Infectious Diseases; Novartis Institutes for BioMedical Research; Emeryville California 94608
| | - Gül Erdemli
- Center for Proteomic Chemistry; Novartis Institutes for BioMedical Research; Cambridge Massachusetts 02139
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89
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Miller MD, Kale M, Reddy K, Tentarelli S, Zambrowski M, Zhang M, Palmer T, Breen J, Lahiri S, Shirude PS, Verheijen JC. Alkylidene Oxapenem β-Lactamase Inhibitors Revisited: Potent Broad Spectrum Activity but New Stability Challenges. ACS Med Chem Lett 2014; 5:915-20. [PMID: 25147614 DOI: 10.1021/ml5001855] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Accepted: 06/20/2014] [Indexed: 11/29/2022] Open
Abstract
We present a comprehensive study of C6-alkylidene containing oxapenems. We show that this class of β-lactamase inhibitors possesses an unprecedented spectrum with activity against class A, C, and D enzymes. Surprisingly, this class of compounds displayed significant photolytic instability in addition to the known hydrolytic instability. Quantum mechanical calculations were used to develop models to predict the stability of new analogues.
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Affiliation(s)
- Matthew D. Miller
- Infection
iMed, AstraZeneca, 35 Gatehouse Drive, Waltham, Massachusetts 02451, United States
| | - Manoj Kale
- Department
of Medicinal Chemistry, AstraZeneca India Pvt. Ltd, Avishkar, Bellary
Road, Bangalore 560024, India
| | - Kishore Reddy
- Department
of Medicinal Chemistry, AstraZeneca India Pvt. Ltd, Avishkar, Bellary
Road, Bangalore 560024, India
| | - Sharon Tentarelli
- Infection
iMed, AstraZeneca, 35 Gatehouse Drive, Waltham, Massachusetts 02451, United States
| | - Mark Zambrowski
- Infection
iMed, AstraZeneca, 35 Gatehouse Drive, Waltham, Massachusetts 02451, United States
| | - Minli Zhang
- Infection
iMed, AstraZeneca, 35 Gatehouse Drive, Waltham, Massachusetts 02451, United States
| | - Tiffany Palmer
- Infection
iMed, AstraZeneca, 35 Gatehouse Drive, Waltham, Massachusetts 02451, United States
| | - John Breen
- Infection
iMed, AstraZeneca, 35 Gatehouse Drive, Waltham, Massachusetts 02451, United States
| | - Sushmita Lahiri
- Infection
iMed, AstraZeneca, 35 Gatehouse Drive, Waltham, Massachusetts 02451, United States
| | - Pravin S. Shirude
- Department
of Medicinal Chemistry, AstraZeneca India Pvt. Ltd, Avishkar, Bellary
Road, Bangalore 560024, India
| | - Jeroen C. Verheijen
- Infection
iMed, AstraZeneca, 35 Gatehouse Drive, Waltham, Massachusetts 02451, United States
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90
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Mohebbi M, Salehi P, Bararjanian M, Aliahmadi A, Safavi-Sohi R, Ghasemi JB. Synthesis, antibacterial activity, and CoMFA study of new 1,2,3-triazolyl 7-carboxamidodesacetoxy cephalosporanic acid derivatives. Med Chem Res 2014. [DOI: 10.1007/s00044-014-1014-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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91
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Qin W, Panunzio M, Biondi S. β-Lactam Antibiotics Renaissance. Antibiotics (Basel) 2014; 3:193-215. [PMID: 27025744 PMCID: PMC4790388 DOI: 10.3390/antibiotics3020193] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Revised: 04/30/2014] [Accepted: 05/04/2014] [Indexed: 11/16/2022] Open
Abstract
Since the 1940s β-lactam antibiotics have been used to treat bacterial infections. However, emergence and dissemination of β-lactam resistance has reached the point where many marketed β-lactams no longer are clinically effective. The increasing prevalence of multidrug-resistant bacteria and the progressive withdrawal of pharmaceutical companies from antibiotic research have evoked a strong reaction from health authorities, who have implemented initiatives to encourage the discovery of new antibacterials. Despite this gloomy scenario, several novel β-lactam antibiotics and β-lactamase inhibitors have recently progressed into clinical trials, and many more such compounds are being investigated. Here we seek to provide highlights of recent developments relating to the discovery of novel β-lactam antibiotics and β-lactamase inhibitors.
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Affiliation(s)
- Wenling Qin
- ISOF-CNR Department of Chemistry "G. Ciamician", Via Selmi, 2 I-40126 Bologna, Italy.
| | - Mauro Panunzio
- ISOF-CNR Department of Chemistry "G. Ciamician", Via Selmi, 2 I-40126 Bologna, Italy.
| | - Stefano Biondi
- Allecra Therapeutics SAS, 13, rue de Village-Neuf, F-68300 St-Louis, France.
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92
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Xiao ZP, Wang XD, Wang PF, Zhou Y, Zhang JW, Zhang L, Zhou J, Zhou SS, Ouyang H, Lin XY, Mustapa M, Reyinbaike A, Zhu HL. Design, synthesis, and evaluation of novel fluoroquinolone-flavonoid hybrids as potent antibiotics against drug-resistant microorganisms. Eur J Med Chem 2014; 80:92-100. [PMID: 24769347 DOI: 10.1016/j.ejmech.2014.04.037] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 04/10/2014] [Accepted: 04/11/2014] [Indexed: 12/15/2022]
Abstract
Based on a rationally conceived pharmacophore model to build a multi-target bacterial topoisomerase inhibitor, twenty-one fluoroquinolone-flavonoid hybrids were synthesized. Some obtained hybrids show excellent antibacterial activity against drug-resistant microorganisms with narigenin-ciprofloxacin being the most active, showing 8, 43, 23 and 88 times better activity than ciprofloxacin against Escherichia coli ATCC 35218, Bacillus subtilis ATCC 6633, Staphylococcus aureus ATCC 25923 and Candida albicans ATCC 90873, respectively. Drug accumulation and DNA supercoiling assays of two active analogues revealed potent inhibition of both the DNA gyrase and efflux pump, confirming the desired dual mode of action. Molecular docking study disclosed that the introduced flavonoid moiety not only provides several additional interactions but also does not disturb the binding mode of the floxacin moiety. Our data also demonstrated that development of antifungals is possible from fluoroquinolones modified at C-7 position.
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Affiliation(s)
- Zhu-Ping Xiao
- College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, PR China; State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing 210093, PR China.
| | - Xu-Dong Wang
- College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, PR China
| | - Peng-Fei Wang
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing 210093, PR China
| | - Yin Zhou
- College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, PR China
| | - Jing-Wen Zhang
- College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, PR China
| | - Lei Zhang
- College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, PR China
| | - Jiao Zhou
- College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, PR China
| | - Sha-Sha Zhou
- College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, PR China
| | - Hui Ouyang
- College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, PR China
| | - Xiao-Yi Lin
- College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, PR China
| | - Manzira Mustapa
- College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, PR China
| | - Asaimuguli Reyinbaike
- College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, PR China
| | - Hai-Liang Zhu
- College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, PR China; State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing 210093, PR China.
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93
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Molecular Targets of β-Lactam-Based Antimicrobials: Beyond the Usual Suspects. Antibiotics (Basel) 2014; 3:128-42. [PMID: 27025739 PMCID: PMC4790389 DOI: 10.3390/antibiotics3020128] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2013] [Revised: 02/24/2014] [Accepted: 02/25/2014] [Indexed: 12/20/2022] Open
Abstract
The common practice in antibacterial drug development has been to rapidly make an attempt to find ever-more stable and broad-spectrum variants for a particular antibiotic, once a drug resistance for that antibiotic is detected. We are now facing bacterial resistance toward our clinically relevant antibiotics of such a magnitude that the conversation for antimicrobial drug development ought to include effective new antibiotics with alternative mechanisms of action. The electrophilic β-lactam ring is amenable for the inhibition of different enzyme classes by a suitable decoration of the core scaffold. Monocyclic β-lactams lacking an ionizable group at the lactam nitrogen exhibit target preferences toward bacterial enzymes important for resistance and virulence. The present review intends to draw attention to the versatility of the β-lactams as antimicrobials with "unusual" molecular targets.
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94
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Kataoka N, Vangnai AS, Ueda H, Tajima T, Nakashimada Y, Kato J. Enhancement of (R)-1,3-butanediol production by engineered Escherichia coli using a bioreactor system with strict regulation of overall oxygen transfer coefficient and pH. Biosci Biotechnol Biochem 2014; 78:695-700. [DOI: 10.1080/09168451.2014.891933] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Abstract
(R)-1,3-butanediol ((R)-1,3-BD) is an important substrate for the synthesis of industrial chemicals. Despite its large demand, a bioprocess for the efficient production of 1,3-BD from renewable resources has not been developed. We previously reported the construction of recombinant Escherichia coli that could efficiently produce (R)-1,3-BD from glucose. In this study, the fermentation conditions were optimized to further improve 1,3-BD production by the recombinant strain. A batch fermentation was performed with an optimized overall oxygen transfer coefficient (82.3 h−1) and pH (5.5); the 1,3-BD concentration reached 98.5 mM after 36 h with high-yield (0.444 mol (mol glucose)−1) and a high maximum production rate (3.63 mM h−1). In addition, a fed-batch fermentation enabled the recombinant strain to produce 174.8 mM 1,3-BD after 96 h cultivation with a yield of 0.372 mol (mol glucose)−1, a maximum production rate of 3.90 mM h−1, and a 98.6% enantiomeric excess (% ee) of (R)-1,3-BD.
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Affiliation(s)
- Naoya Kataoka
- Japan Society for the Promotion of Science, Hiroshima, Japan
- Department of Molecular Biotechnology, Graduate School of Advanced Science of Matter, Hiroshima University, Hiroshima, Japan
| | - Alisa S Vangnai
- Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
- Center of Excellence on Hazardous Substance Management (HSM), Chulalongkorn University, Bangkok, Thailand
| | - Hiromitsu Ueda
- Department of Molecular Biotechnology, Graduate School of Advanced Science of Matter, Hiroshima University, Hiroshima, Japan
| | - Takahisa Tajima
- Department of Molecular Biotechnology, Graduate School of Advanced Science of Matter, Hiroshima University, Hiroshima, Japan
| | - Yutaka Nakashimada
- Department of Molecular Biotechnology, Graduate School of Advanced Science of Matter, Hiroshima University, Hiroshima, Japan
| | - Junichi Kato
- Department of Molecular Biotechnology, Graduate School of Advanced Science of Matter, Hiroshima University, Hiroshima, Japan
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95
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Abstract
The production of β-lactamase is one of the primary resistance mechanisms used by Gram-negative bacterial pathogens to counter β-lactam antibiotics, such as penicillins, cephalosporins and carbapenems. There is an urgent need to develop novel β-lactamase inhibitors in response to ever evolving β-lactamases possessing an expanded spectrum of β-lactam hydrolyzing activity. Whereas traditional high-throughput screening has proven ineffective against serine β-lactamases, fragment-based approaches have been successfully employed to identify novel chemical matter, which in turn has revealed much about the specific molecular interactions possible in the active site of serine and metallo β-lactamases. In this review, we summarize recent progress in the field, particularly: the identification of novel inhibitor chemotypes through fragment-based screening; the use of fragment-protein structures to understand key features of binding hot spots and inform the design of improved leads; lessons learned and new prospects for β-lactamase inhibitor development using fragment-based approaches.
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Affiliation(s)
- Derek A Nichols
- University of South Florida College of Medicine, Department of Molecular Medicine, 12901 Bruce B. Downs Blvd, MDC 3522, Tampa, FL 33612, USA
| | - Adam R Renslo
- Department of Pharmaceutical Chemistry & Small Molecule Discovery Center, University of California San Francisco, 1700 4th Street, Byers Hall S504, San Francisco, CA 94158, USA
| | - Yu Chen
- University of South Florida College of Medicine, Department of Molecular Medicine, 12901 Bruce B. Downs Blvd, MDC 3522, Tampa, FL 33612, USA
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96
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Ma J, McLeod S, MacCormack K, Sriram S, Gao N, Breeze AL, Hu J. Real-time monitoring of New Delhi metallo-β-lactamase activity in living bacterial cells by 1H NMR spectroscopy. Angew Chem Int Ed Engl 2014; 53:2130-3. [PMID: 24458501 PMCID: PMC4232273 DOI: 10.1002/anie.201308636] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Revised: 11/19/2013] [Indexed: 11/13/2022]
Abstract
Disconnections between in vitro responses and those observed in whole cells confound many attempts to design drugs in areas of serious medical need. A method based on 1D 1H NMR spectroscopy is reported that affords the ability to monitor the hydrolytic decomposition of the carbapenem antibiotic meropenem inside Escherichia coli cells expressing New Delhi metallo-β-lactamase subclass 1 (NDM-1), an emerging antibiotic-resistance threat. Cell-based NMR studies demonstrated that two known NDM-1 inhibitors, L-captopril and ethylenediaminetetraacetic acid (EDTA), inhibit the hydrolysis of meropenem in vivo. NDM-1 activity in cells was also shown to be inhibited by spermine, a porin inhibitor, although in an in vitro assay, the influence of spermine on the activity of isolated NDM-1 protein is minimal. This new approach may have generic utility for monitoring reactions involving diffusible metabolites in other complex biological matrices and whole-cell settings, including mammalian cells.
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Affiliation(s)
- Junhe Ma
- Discovery Sciences, AstraZeneca Boston, Waltham, MA 02451 (USA)
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97
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Ma J, McLeod S, MacCormack K, Sriram S, Gao N, Breeze AL, Hu J. Real-Time Monitoring of New Delhi Metallo-β-Lactamase Activity in Living Bacterial Cells by1H NMR Spectroscopy. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201308636] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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98
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González LJ, Moreno DM, Bonomo RA, Vila AJ. Host-specific enzyme-substrate interactions in SPM-1 metallo-β-lactamase are modulated by second sphere residues. PLoS Pathog 2014; 10:e1003817. [PMID: 24391494 PMCID: PMC3879351 DOI: 10.1371/journal.ppat.1003817] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2013] [Accepted: 10/21/2013] [Indexed: 11/18/2022] Open
Abstract
Pseudomonas aeruginosa is one of the most virulent and resistant non-fermenting Gram-negative pathogens in the clinic. Unfortunately, P. aeruginosa has acquired genes encoding metallo-β-lactamases (MβLs), enzymes able to hydrolyze most β-lactam antibiotics. SPM-1 is an MβL produced only by P. aeruginosa, while other MβLs are found in different bacteria. Despite similar active sites, the resistance profile of MβLs towards β-lactams changes from one enzyme to the other. SPM-1 is unique among pathogen-associated MβLs in that it contains “atypical” second sphere residues (S84, G121). Codon randomization on these positions and further selection of resistance-conferring mutants was performed. MICs, periplasmic enzymatic activity, Zn(II) requirements, and protein stability was assessed. Our results indicated that identity of second sphere residues modulates the substrate preferences and the resistance profile of SPM-1 expressed in P. aeruginosa. The second sphere residues found in wild type SPM-1 give rise to a substrate selectivity that is observed only in the periplasmic environment. These residues also allow SPM-1 to confer resistance in P. aeruginosa under Zn(II)-limiting conditions, such as those expected under infection. By optimizing the catalytic efficiency towards β-lactam antibiotics, the enzyme stability and the Zn(II) binding features, molecular evolution meets the specific needs of a pathogenic bacterial host by means of substitutions outside the active site. The presence of Zn(II)-containing metallo-β-lactamases (MβLs) that confer resistance to all penicillins, cephalosporins and carbapenems in Pseudomonas aeruginosa adds significantly to the threat of this pathogen in our health care system. SPM-1 is an MβLs widely distributed in South America and only found in P. aeruginosa. In common with all MβLs, the active site residues are highly conserved. In this work we asked the following question: how would substrate specificity evolve in SPM-1 if the active site residues are highly uniform and do not permit substitutions. To this end, we explored the role of two amino acids (S84 and G121) that are outside the active site (second sphere) and are unique in the SPM-1 β-lactamase. We discovered that replacing these amino acids impacts resistance to cephalosporins and carbapenems and that this resistance profile depends on the enzymatic behavior and the availability of Zn(II) in the environment. This work demonstrates how protein evolution by means of subtle substitutions outside the active site meets the specific needs of a pathogenic bacterial host.
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Affiliation(s)
- Lisandro J. González
- Instituto de Biología Molecular y Celular de Rosario (IBR, CONICET-UNR) and Area Biofísica, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Rosario, Argentina
| | - Diego M. Moreno
- Instituto de Química Rosario (IQUIR, CONICET-UNR), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Rosario, Argentina
| | - Robert A. Bonomo
- Research Service, Louis Stokes Cleveland Department of Veterans Affairs Medical Center and Departments of Medicine, Pharmacology, Molecular Biology and Microbiology, Case Western Reserve University, School of Medicine, Cleveland, Ohio, United States of America
| | - Alejandro J. Vila
- Instituto de Biología Molecular y Celular de Rosario (IBR, CONICET-UNR) and Area Biofísica, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Rosario, Argentina
- * E-mail:
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P. Brown D, Zhao H, M. Khondoker J, R. Bhavsar J, C. Sigamoney C. Synthesis of Novel β-Lactam Hybrids of Phenstatin and Other Substituted Aromatics as New Bioactives. HETEROCYCLES 2014. [DOI: 10.3987/com-14-13085] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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100
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Lupoli TJ, Lebar MD, Markovski M, Bernhardt T, Kahne D, Walker S. Lipoprotein activators stimulate Escherichia coli penicillin-binding proteins by different mechanisms. J Am Chem Soc 2013; 136:52-5. [PMID: 24341982 DOI: 10.1021/ja410813j] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
In Escherichia coli , the bifunctional penicillin-binding proteins (PBPs), PBP1A and PBP1B, play critical roles in the final stage of peptidoglycan (PG) biosynthesis. These synthetic enzymes each possess a PG glycosyltransferase (PGT) domain and a transpeptidase (TP) domain. Recent genetic experiments have shown that PBP1A and PBP1B each require an outer membrane lipoprotein, LpoA and LpoB, respectively, to function properly in vivo. Here, we use complementary assays to show that LpoA and LpoB each increase the PGT and TP activities of their cognate PBPs, albeit by different mechanisms. LpoA directly increases the rate of the PBP1A TP reaction, which also results in enhanced PGT activity; in contrast, LpoB directly affects PGT domain activity, resulting in enhanced TP activity. These studies demonstrate bidirectional coupling of PGT and TP domain function. Additionally, the transpeptidation assay described here can be applied to study other activators or inhibitors of the TP domain of PBPs, which are validated drug targets.
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Affiliation(s)
- Tania J Lupoli
- Department of Microbiology and Immunobiology, Harvard Medical School , Boston, Massachusetts 02115, United States
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