Metallocenyl 7‐ACA Conjugates: Antibacterial Activity Studies and Atomic‐Resolution X‐ray Crystal Structure with CTX‐M β‐Lactamase
Abstract
Abstract The conjugation of organometallic groups to current β‐lactam antibiotics is a field of increasing study due to the ability of certain organometallic groups to enhance the antibiotic potency of these drugs. Herein, we report the antibacterial properties of two metallocenyl (ferrocenyl and ruthenocenyl) 7‐aminocephalosporanic acid (7‐ACA) antibiotic conjugates. Continuing a trend we found in our previous studies, the ruthenocenyl conjugate showed greater antibacterial activity than its ferrocenyl counterpart. Compared with the previously published 7‐aminodesacetoxycephalosporanic acid (7‐ADCA) conjugates, the 3‐acetyloxymethyl group significantly improved the compounds’ activity. Furthermore, the Rc‐7‐ACA compound was more active against clinical Staphylococcus aureus isolates than the ampicillin reference. Noticeably, neither of the two new compounds showed an undesirable toxic effect in HeLa and L929 cells at the concentrations at which they displayed strong antibacterial effects. The antibacterial activity of the two metallocenyl 7‐ACA derivatives was further confirmed by scanning electron microscopy (SEM). SEM micrographs showed that bacteria treated with metallocenyl 7‐ACA derivatives feature cell wall damage and morphology changes. Using a CTX‐M‐14 β‐lactamase competition assay based on nitrocefin hydrolysis, we showed that the Rc‐7‐ACA bound more favorably to CTX‐M‐14 than its ferrocenyl counterpart, again confirming the superiority of the ruthenocenyl moiety over the ferrocenyl one inmore »
- Authors:
-
- Department of Molecular Medicine University of South Florida, >,Morsani College of Medicine 12901 Bruce B. Downs Boulevard Tampa FL 33612 US
- Department of Organic Chemistry, Faculty of Chemistry University of Łódź Tamka 12 91-403 Łódź Poland
- Department of Microbial Genetics, Faculty of Biology and Environmental Protection University of Łódź Banacha 12/16 90-237 Łódź Poland
- Department of Chemical Engineering Aragon Health Research Institute (IIS Aragón) University of Zaragoza Campus Río Ebro-Edificio I+D, c/ Poeta Mariano Esquillor s/n 5018 Zaragoza Spain
- Department of Chemical Engineering Aragon Health Research Institute (IIS Aragón) University of Zaragoza Campus Río Ebro-Edificio I+D, c/ Poeta Mariano Esquillor s/n 5018 Zaragoza Spain, Networking Research Center on Bioengineering Biomaterials and Nanomedicine CIBER-BBN 28029 Madrid Spain
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1615058
- Grant/Contract Number:
- W-31-109-Eng-38; S10_RR25528; S10_RR028976
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- ChemBioChem: a European journal of chemical biology
- Additional Journal Information:
- Journal Name: ChemBioChem: a European journal of chemical biology Journal Volume: 21 Journal Issue: 15; Journal ID: ISSN 1439-4227
- Publisher:
- Wiley Blackwell (John Wiley & Sons)
- Country of Publication:
- France
- Language:
- English
Citation Formats
Lewandowski, Eric M., Szczupak, Łukasz, Kowalczyk, Aleksandra, Mendoza, Gracia, Arruebo, Manuel, Jacobs, Lian M. C., Stączek, Paweł, Chen, Yu, and Kowalski, Konrad. Metallocenyl 7‐ACA Conjugates: Antibacterial Activity Studies and Atomic‐Resolution X‐ray Crystal Structure with CTX‐M β‐Lactamase. France: N. p., 2020.
Web. doi:10.1002/cbic.202000054.
Lewandowski, Eric M., Szczupak, Łukasz, Kowalczyk, Aleksandra, Mendoza, Gracia, Arruebo, Manuel, Jacobs, Lian M. C., Stączek, Paweł, Chen, Yu, & Kowalski, Konrad. Metallocenyl 7‐ACA Conjugates: Antibacterial Activity Studies and Atomic‐Resolution X‐ray Crystal Structure with CTX‐M β‐Lactamase. France. https://doi.org/10.1002/cbic.202000054
Lewandowski, Eric M., Szczupak, Łukasz, Kowalczyk, Aleksandra, Mendoza, Gracia, Arruebo, Manuel, Jacobs, Lian M. C., Stączek, Paweł, Chen, Yu, and Kowalski, Konrad. Thu .
"Metallocenyl 7‐ACA Conjugates: Antibacterial Activity Studies and Atomic‐Resolution X‐ray Crystal Structure with CTX‐M β‐Lactamase". France. https://doi.org/10.1002/cbic.202000054.
@article{osti_1615058,
title = {Metallocenyl 7‐ACA Conjugates: Antibacterial Activity Studies and Atomic‐Resolution X‐ray Crystal Structure with CTX‐M β‐Lactamase},
author = {Lewandowski, Eric M. and Szczupak, Łukasz and Kowalczyk, Aleksandra and Mendoza, Gracia and Arruebo, Manuel and Jacobs, Lian M. C. and Stączek, Paweł and Chen, Yu and Kowalski, Konrad},
abstractNote = {Abstract The conjugation of organometallic groups to current β‐lactam antibiotics is a field of increasing study due to the ability of certain organometallic groups to enhance the antibiotic potency of these drugs. Herein, we report the antibacterial properties of two metallocenyl (ferrocenyl and ruthenocenyl) 7‐aminocephalosporanic acid (7‐ACA) antibiotic conjugates. Continuing a trend we found in our previous studies, the ruthenocenyl conjugate showed greater antibacterial activity than its ferrocenyl counterpart. Compared with the previously published 7‐aminodesacetoxycephalosporanic acid (7‐ADCA) conjugates, the 3‐acetyloxymethyl group significantly improved the compounds’ activity. Furthermore, the Rc‐7‐ACA compound was more active against clinical Staphylococcus aureus isolates than the ampicillin reference. Noticeably, neither of the two new compounds showed an undesirable toxic effect in HeLa and L929 cells at the concentrations at which they displayed strong antibacterial effects. The antibacterial activity of the two metallocenyl 7‐ACA derivatives was further confirmed by scanning electron microscopy (SEM). SEM micrographs showed that bacteria treated with metallocenyl 7‐ACA derivatives feature cell wall damage and morphology changes. Using a CTX‐M‐14 β‐lactamase competition assay based on nitrocefin hydrolysis, we showed that the Rc‐7‐ACA bound more favorably to CTX‐M‐14 than its ferrocenyl counterpart, again confirming the superiority of the ruthenocenyl moiety over the ferrocenyl one in interacting with proteins. We also report a 1.47 Å resolution crystal structure of Rc‐7‐ACA in complex with the CTX‐M‐14 E166A mutant, an enzyme sharing a similar active site configuration with penicillin‐binding proteins, the molecular target of β‐lactam antibiotics. These results strengthen the case for the antibacterial utility of the Rc and Fc groups.},
doi = {10.1002/cbic.202000054},
journal = {ChemBioChem: a European journal of chemical biology},
number = 15,
volume = 21,
place = {France},
year = {Thu Apr 16 00:00:00 EDT 2020},
month = {Thu Apr 16 00:00:00 EDT 2020}
}
https://doi.org/10.1002/cbic.202000054
Web of Science
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