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Decuyper L, Deketelaere S, Vanparys L, Jukič M, Sosič I, Sauvage E, Amoroso AM, Verlaine O, Joris B, Gobec S, D'hooghe M. In Silico Design and Enantioselective Synthesis of Functionalized Monocyclic 3-Amino-1-carboxymethyl-β-lactams as Inhibitors of Penicillin-Binding Proteins of Resistant Bacteria. Chemistry 2018; 24:15254-15266. [PMID: 29882610 DOI: 10.1002/chem.201801868] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 06/07/2018] [Indexed: 01/20/2023]
Abstract
As a complement to the renowned bicyclic β-lactam antibiotics, monocyclic analogues provide a breath of fresh air in the battle against resistant bacteria. In that framework, the present study discloses the in silico design and unprecedented ten-step synthesis of eleven nocardicin-like enantiomerically pure 2-{3-[2-(2-aminothiazol-4-yl)-2-(methoxyimino)acetamido]-2-oxoazetidin-1-yl}acetic acids starting from serine as a readily accessible precursor. The capability of this novel class of monocyclic 3-amino-β-lactams to inhibit penicillin-binding proteins (PBPs) of various (resistant) bacteria was assessed, revealing the potential of α-benzylidenecarboxylates as interesting leads in the pursuit of novel PBP inhibitors. No deactivation by representative enzymes belonging to the four β-lactamase classes was observed, while weak inhibition of class C β-lactamase P99 was demonstrated.
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Affiliation(s)
- Lena Decuyper
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Sari Deketelaere
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Lore Vanparys
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Marko Jukič
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, 1000, Ljubljana, Slovenia
| | - Izidor Sosič
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, 1000, Ljubljana, Slovenia
| | - Eric Sauvage
- Center for Protein Engineering, Faculty of Sciences, University of Liège, Quartier Agora, Allée du 6 Août 13, Bât B6a, 4000, Liège-Sart Tilman, Belgium
| | - Ana Maria Amoroso
- Center for Protein Engineering, Faculty of Sciences, University of Liège, Quartier Agora, Allée du 6 Août 13, Bât B6a, 4000, Liège-Sart Tilman, Belgium
| | - Olivier Verlaine
- Center for Protein Engineering, Faculty of Sciences, University of Liège, Quartier Agora, Allée du 6 Août 13, Bât B6a, 4000, Liège-Sart Tilman, Belgium
| | - Bernard Joris
- Center for Protein Engineering, Faculty of Sciences, University of Liège, Quartier Agora, Allée du 6 Août 13, Bât B6a, 4000, Liège-Sart Tilman, Belgium
| | - Stanislav Gobec
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, 1000, Ljubljana, Slovenia
| | - Matthias D'hooghe
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
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Deketelaere S, Van Nguyen T, Stevens CV, D'hooghe M. Synthetic Approaches toward Monocyclic 3-Amino-β-lactams. ChemistryOpen 2017; 6:301-319. [PMID: 28638759 PMCID: PMC5474669 DOI: 10.1002/open.201700051] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Indexed: 01/17/2023] Open
Abstract
Due to the emerging resistance against classical β-lactam-based antibiotics, a growing number of bacterial infections has become harder to treat. This alarming tendency necessitates continued research on novel antibacterial agents. Many classes of β-lactam antibiotics are characterized by the presence of the 3-aminoazetidin-2-one core, which resembles the natural substrate of the target penicillin-binding proteins. In that respect, this Review summarizes the different synthetic pathways toward this key structure for the development of new antibacterial agents. The most extensively applied methods for 3-amino-β-lactam ring formation are discussed, in addition to a few less common strategies. Moreover, approaches to introduce the 3-amino substituent after ring formation are also covered.
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Affiliation(s)
- Sari Deketelaere
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience EngineeringGhent UniversityCoupure Links 6539000GhentBelgium
| | - Tuyen Van Nguyen
- Institute of ChemistryGraduate University of Science and Technology, Vietnam Academy of Science and Technology18-Hoang Quoc Viet, Cau GiayHanoiVietnam
| | - Christian V. Stevens
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience EngineeringGhent UniversityCoupure Links 6539000GhentBelgium
| | - Matthias D'hooghe
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience EngineeringGhent UniversityCoupure Links 6539000GhentBelgium
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Townsend CA. Convergent biosynthetic pathways to β-lactam antibiotics. Curr Opin Chem Biol 2016; 35:97-108. [PMID: 27693891 DOI: 10.1016/j.cbpa.2016.09.013] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 09/14/2016] [Accepted: 09/15/2016] [Indexed: 02/05/2023]
Abstract
Five naturally-occurring families of β-lactams have inspired a class of drugs that constitute >60% of the antimicrobials used in human medicine. Their biosynthetic pathways reveal highly individualized synthetic strategies that yet converge on a common azetidinone ring assembled in structural contexts that confer selective binding and inhibition of d,d-transpeptidases that play essential roles in bacterial cell wall (peptidoglycan) biosynthesis. These enzymes belong to a single 'clan' of evolutionarily distinct serine hydrolases whose active site geometry and mechanism of action is specifically matched by these antibiotics for inactivation that is kinetically competitive with their native function. Unusual enzyme-mediated reactions and catalytic multitasking in these pathways are discussed with particular attention to the diverse ways the β-lactam itself is generated, and more broadly how the intrinsic reactivity of this core structural element is modulated in natural systems through the introduction of ring strain and electronic effects.
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Affiliation(s)
- Craig A Townsend
- Department of Chemistry, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, USA.
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