Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/209500
Title: The organo-metal-like nature of long-range conduction in cable bacteria
Author: Pankratov, Dimitrii
Hidalgo Martínez, Silvia
Karman, Cheryl
Gerzhik, Anastasia
Gomila Lluch, Gabriel
Trashin, Stanislav
Boschker, Henricus T. S.
Geelhoed, Jeanine S.
Mayer, Dirk
Wael, Karolien de
Meysman, Filip J.R.
Keywords: Transport d'electrons
Bacteris patògens
Electron transport
Pathogenic bacteria
Issue Date: 1-Jun-2024
Publisher: Elsevier B.V.
Abstract: Cable bacteria are filamentous, multicellular microorganisms that display an exceptional form of biological electron transport across centimeter-scale distances. Currents are guided through a network of nickel-containing protein fibers within the cell envelope. Still, the mechanism of long-range conduction remains unresolved. Here, we characterize the conductance of the fiber network under dry and wet, physiologically relevant, conditions. Our data reveal that the fiber conductivity is high (median value: 27 S cm−1; range: 2 to 564 S cm−1), does not show any redox signature, has a low thermal activation energy (Ea = 69 ± 23 meV), and is not affected by humidity or the presence of ions. These features set the nickel-based conduction mechanism in cable bacteria apart from other known forms of biological electron transport. As such, conduction resembles that of an organic semi-metal with a high charge carrier density. Our observation that biochemistry can synthesize an organo-metal-like structure opens the way for novel bio-based electronic technologies. © 2024 The Authors
Note: Reproducció del document publicat a: https://doi.org/10.1016/j.bioelechem.2024.108675
It is part of: Bioelectrochemistry, 2024, vol. 157
URI: http://hdl.handle.net/2445/209500
Related resource: https://doi.org/10.1016/j.bioelechem.2024.108675
ISSN: 1878-562X
Appears in Collections:Articles publicats en revistes (Institut de Bioenginyeria de Catalunya (IBEC))

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