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Scioli G, Marinaccio L, Bauer M, Kamysz W, Parmar A, Newire E, Singh I, Stefanucci A, Mollica A. New Teixobactin Analogues with a Total Lactam Ring. ACS Med Chem Lett 2023; 14:1827-1832. [PMID: 38116416 PMCID: PMC10726481 DOI: 10.1021/acsmedchemlett.3c00435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 10/25/2023] [Accepted: 11/09/2023] [Indexed: 12/21/2023] Open
Abstract
Teixobactin is a new antibiotic peptide with strong efficacy against several Gram-positive resistant bacteria, the structure of which is extremely difficult to obtain in the laboratory via multistep conventional synthesis. To face the increasing antibiotic resistant bacteria, it is fundamental to introduce new types of antibiotics with innovative mechanisms of action without resistance; thus, many scientists are studying and developing new methods to synthesize teixobactin analogues. In this work, seven Arg10-teixobactin analogues with a total lactam ring have been prepared via solid phase peptide synthesis. In order to obtain the total lactam ring, d-Thr8 was replaced by (2R,3S)-diamino-propionic acid. To verify their antimicrobial activity and efficacy, each analogue was tested with MIC against different resistant pathogens, showing an interesting activity for Nle11 containing compounds.
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Affiliation(s)
- Giuseppe Scioli
- Department
of Pharmacy, University “G. d’Annunzio”
Chieti-Pescara, Via dei
Vestini 31, 66100 Chieti, Italy
| | - Lorenza Marinaccio
- Department
of Pharmacy, University “G. d’Annunzio”
Chieti-Pescara, Via dei
Vestini 31, 66100 Chieti, Italy
| | - Marta Bauer
- Department
of Inorganic Chemistry, Faculty of Pharmacy, Medical University of Gdańsk, 80-416 Gdańsk, Poland
| | - Wojciech Kamysz
- Department
of Inorganic Chemistry, Faculty of Pharmacy, Medical University of Gdańsk, 80-416 Gdańsk, Poland
| | - Anish Parmar
- Antimicrobial
Pharmacodynamics and Therapeutics, Department of Molecular and Clinical
Pharmacology, University of Liverpool, Sherrington Building, L69 3GA Liverpool, U.K.
- Department
of Chemistry, The Robert Robinson Laboratories, The University of Liverpool, L69 3BX Liverpool, United Kingdom
| | - Enas Newire
- Antimicrobial
Pharmacodynamics and Therapeutics, Department of Molecular and Clinical
Pharmacology, University of Liverpool, Sherrington Building, L69 3GA Liverpool, U.K.
- Department
of Chemistry, The Robert Robinson Laboratories, The University of Liverpool, L69 3BX Liverpool, United Kingdom
| | - Ishwar Singh
- Antimicrobial
Pharmacodynamics and Therapeutics, Department of Molecular and Clinical
Pharmacology, University of Liverpool, Sherrington Building, L69 3GA Liverpool, U.K.
- Department
of Chemistry, The Robert Robinson Laboratories, The University of Liverpool, L69 3BX Liverpool, United Kingdom
| | - Azzurra Stefanucci
- Department
of Pharmacy, University “G. d’Annunzio”
Chieti-Pescara, Via dei
Vestini 31, 66100 Chieti, Italy
| | - Adriano Mollica
- Department
of Pharmacy, University “G. d’Annunzio”
Chieti-Pescara, Via dei
Vestini 31, 66100 Chieti, Italy
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Wu Q, Mishra B, Wang G. Linearized teixobactin is inactive and after sequence enhancement, kills methicillin-resistant Staphylococcus aureus via a different mechanism. Pept Sci (Hoboken) 2022; 114:e24269. [PMID: 36249542 PMCID: PMC9564113 DOI: 10.1002/pep2.24269] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Staphylococcus aureus is a highly adaptable pathogen that can rapidly develop resistance to conventional antibiotics such as penicillin. Recently, teixobactin was discovered from uncultivated soil bacteria by using the i-chip technology. This depsipeptide forms an ester bond between the backbone C-terminal isoleucine carboxylic acid and the hydroxyl group of threonine at position 8. Also, it contains multiple nonstandard amino acids, making it costly to synthesize. This study reports new peptides designed by linearizing teixobactin. After linearization and conversion to normal amino acids, teixobactin lost its antibacterial activity. Using this inactive template, a series of peptides were designed via hydrophobic patching and residue replacements. Three out of the five peptides were active. YZ105, only active against Gram-positive bacteria, however, showed the highest cell selectivity index. Different from teixobactin, which inhibits cell wall synthesis, YZ105 targeted the membranes of methicillin-resistant S. aureus (MRSA) based on kinetic killing, membrane permeation, depolarization, and scanning electron microscopy studies. Moreover, YZ105 could kill nafcillin-resistant MRSA, Staphylococcal clinical strains, and disrupted preformed biofilms. Taken together, YZ105, with a simpler sequence, is a promising lead for developing novel anti-MRSA agents.
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Affiliation(s)
- Qianhui Wu
- Department of Pathology and Microbiology, College of MedicineUniversity of Nebraska Medical CenterOmahaNebraskaUSA
| | - Biswajit Mishra
- Department of Pathology and Microbiology, College of MedicineUniversity of Nebraska Medical CenterOmahaNebraskaUSA
| | - Guangshun Wang
- Department of Pathology and Microbiology, College of MedicineUniversity of Nebraska Medical CenterOmahaNebraskaUSA
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