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Bafna JA, Sans-Serramitjana E, Acosta-Gutiérrez S, Bodrenko IV, Hörömpöli D, Berscheid A, Brötz-Oesterhelt H, Winterhalter M, Ceccarelli M. Kanamycin Uptake into Escherichia coli Is Facilitated by OmpF and OmpC Porin Channels Located in the Outer Membrane. ACS Infect Dis 2020; 6:1855-1865. [PMID: 32369342 DOI: 10.1021/acsinfecdis.0c00102] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Despite decades of therapeutic application of aminoglycosides, it is still a matter of debate if porins contribute to the translocation of the antibiotics across the bacterial outer membrane. Here, we quantified the uptake of kanamycin across the major porin channels OmpF and OmpC present in the outer membrane of Escherichia coli. Our analysis revealed that, despite its relatively large size, about 10-20 kanamycin molecules per second permeate through OmpF and OmpC under a 10 μM concentration gradient, whereas OmpN does not allow the passage. Molecular simulations elucidate the uptake mechanism of kanamycin through these porins. Whole-cell studies with a defined set of E. coli porin mutants provide evidence that translocation of kanamycin via porins is relevant for antibiotic potency. The values are discussed with respect to other antibiotics.
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Affiliation(s)
- Jayesh Arun Bafna
- Department of Life Sciences and Chemistry, Jacobs University Bremen, D-28719Bremen, Germany
| | | | | | - Igor V. Bodrenko
- IOM/CNR, Sezione di Cagliari, Cittadella Universitaria di Monserrato, 09042 Monserrato, Italy
| | - Daniel Hörömpöli
- Department of Microbial Bioactive Compounds, Interfaculty Institute of Microbiology and Infection Medicine, University of Tübingen, D-72076 Tübingen, Germany
- German Center for Infection Research (DZIF) Partner Site, D-72076 Tübingen, Germany
| | - Anne Berscheid
- Department of Microbial Bioactive Compounds, Interfaculty Institute of Microbiology and Infection Medicine, University of Tübingen, D-72076 Tübingen, Germany
- German Center for Infection Research (DZIF) Partner Site, D-72076 Tübingen, Germany
| | - Heike Brötz-Oesterhelt
- Department of Microbial Bioactive Compounds, Interfaculty Institute of Microbiology and Infection Medicine, University of Tübingen, D-72076 Tübingen, Germany
- German Center for Infection Research (DZIF) Partner Site, D-72076 Tübingen, Germany
| | - Mathias Winterhalter
- Department of Life Sciences and Chemistry, Jacobs University Bremen, D-28719Bremen, Germany
| | - Matteo Ceccarelli
- IOM/CNR, Sezione di Cagliari, Cittadella Universitaria di Monserrato, 09042 Monserrato, Italy
- Department of Physics, University of Cagliari, and CNR/IOM, Cittadella Universitaria di Monserrato, 09042 Monserrato, Italy
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Comparison between Hodgkin–Huxley and Markov formulations of cardiac ion channels. J Theor Biol 2016; 399:92-102. [DOI: 10.1016/j.jtbi.2016.03.039] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 03/22/2016] [Accepted: 03/28/2016] [Indexed: 11/18/2022]
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