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Caradec T, Anoz-Carbonell E, Petrov R, Billamboz M, Antraygues K, Cantrelle FX, Boll E, Beury D, Hot D, Drobecq H, Trivelli X, Hartkoorn RC. A Novel Natural Siderophore Antibiotic Conjugate Reveals a Chemical Approach to Macromolecule Coupling. ACS CENTRAL SCIENCE 2023; 9:2138-2149. [PMID: 38033789 PMCID: PMC10683483 DOI: 10.1021/acscentsci.3c00965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 10/13/2023] [Accepted: 10/13/2023] [Indexed: 12/02/2023]
Abstract
Inspired by natural sideromycins, the conjugation of antibiotics to siderophores is an attractive strategy to facilitate "Trojan horse" delivery of antibiotics into bacteria. Genome analysis of a soil bacterium, Dactylosporangium fulvum, found a "hybrid" biosynthetic gene cluster responsible for the production of both an antibiotic, pyridomycin, and a novel chlorocatechol-containing siderophore named chlorodactyloferrin. While both of these natural products were synthesized independently, analysis of the culture supernatant also identified a conjugate of both molecules. We then found that the addition of ferric iron to purified chlorodactyloferrin and pyridomycin instigated their conjugation, leading to the formation of a covalent bond between the siderophore-catechol and the pyridomycin-pyridine groups. Using model reactants, this iron-based reaction was found to proceed through a Michael-type addition reaction, where ferric iron oxidizes the siderophore-catechol group into its quinone form, which is then attacked by the antibiotic pyridyl-nitrogen to form the catechol-pyridinium linkage. These findings prompted us to explore if other "cargo" molecules could be attached to chlorodactyloferrin in a similar manner, and this was indeed confirmed with a pyridine-substituted TAMRA fluorophore as well as with pyridine-substituted penicillin, rifampicin, and norfloxacin antibiotic analogues. The resultant biomimetic conjugates were demonstrated to effectively enter a number of bacteria, with TAMRA-chlorodactyloferrin conjugates causing fluorescent labeling of the bacteria, and with penicillin and rifampicin conjugates eliciting antibiotic activity. These findings open up new opportunities for the design and facile synthesis of a novel class of biomimetic siderophore conjugates with antibiotic activity.
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Affiliation(s)
- Thibault Caradec
- Université
Lille, CNRS, Inserm, CHU Lille, Institut Pasteur Lille, U1019 - UMR 9017 - CIIL - Center for Infection and
Immunity of Lille, F-59000 Lille, France
| | - Ernesto Anoz-Carbonell
- Université
Lille, CNRS, Inserm, CHU Lille, Institut Pasteur Lille, U1019 - UMR 9017 - CIIL - Center for Infection and
Immunity of Lille, F-59000 Lille, France
| | - Ravil Petrov
- Université
Lille, CNRS, Inserm, CHU Lille, Institut Pasteur Lille, U1019 - UMR 9017 - CIIL - Center for Infection and
Immunity of Lille, F-59000 Lille, France
| | - Muriel Billamboz
- Université
Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1167 - RID-AGE - Risk Factors and Molecular Determinants of Aging-Related
Diseases, F-59000 Lille, France
- JUNIA,
Health and Environment, Laboratory of Sustainable
Chemistry and Health, F-59000 Lille, France
| | - Kevin Antraygues
- Université
Lille, Inserm, Institut Pasteur de Lille, U1177 - Drugs and Molecules for Living Systems, F-59000 Lille, France
| | - Francois-Xavier Cantrelle
- Université
Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1167 - RID-AGE - Risk Factors and Molecular Determinants of Aging-Related
Diseases, F-59000 Lille, France
- CNRS, EMR9002
BSI Integrative Structural Biology, 59000 Lille, France
| | - Emmanuelle Boll
- Université
Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1167 - RID-AGE - Risk Factors and Molecular Determinants of Aging-Related
Diseases, F-59000 Lille, France
- CNRS, EMR9002
BSI Integrative Structural Biology, 59000 Lille, France
| | - Delphine Beury
- Université
Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, UMR2014 - US41 - PLBS-Plateformes Lilloises de Biologie
& Santé, F-59000 Lille, France
| | - David Hot
- Université
Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, UMR2014 - US41 - PLBS-Plateformes Lilloises de Biologie
& Santé, F-59000 Lille, France
| | - Herve Drobecq
- Université
Lille, CNRS, Inserm, CHU Lille, Institut Pasteur Lille, U1019 - UMR 9017 - CIIL - Center for Infection and
Immunity of Lille, F-59000 Lille, France
| | - Xavier Trivelli
- Université
Lille, CNRS, INRAE, Centrale Lille, Université d’Artois, FR 2638 - IMEC - Institut Michel-Eugène Chevreul, 59000 Lille, France
| | - Ruben C. Hartkoorn
- Université
Lille, CNRS, Inserm, CHU Lille, Institut Pasteur Lille, U1019 - UMR 9017 - CIIL - Center for Infection and
Immunity of Lille, F-59000 Lille, France
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