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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/180328
Efficient long-range conduction in cable bacteria through nickel protein wires
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Filamentous cable bacteria display long-range electron transport, generating electrical currents over centimeter distances through a highly ordered network of fibers embedded in their cell envelope. The conductivity of these periplasmic wires is exceptionally high for a biological material, but their chemical structure and underlying electron transport mechanism remain unresolved. Here, we combine high-resolution microscopy, spectroscopy, and chemical imaging on individual cable bacterium filaments to demonstrate that the periplasmic wires consist of a conductive protein core surrounded by an insulating protein shell layer. The core proteins contain a sulfur-ligated nickel cofactor, and conductivity decreases when nickel is oxidized or selectively removed. The involvement of nickel as the active metal in biological conduction is remarkable, and suggests a hitherto unknown form of electron transport that enables efficient conduction in centimeter-long protein structures.
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BOSCHKER, Henricus t. s., COOK, Perran l. m., POLERECKY, Lubos, EACHAMBADI, Raghavendran thiruvallur, LOZANO, Helena, HIDALGO MARTINEZ, Silvia, KHALENKOW, Dmitry, SPAMPINATO, Valentina, CLAES, Nathalie, KUNDU, Paromita, WANG, Da, BALS, Sara, SAND, Karina k., CAVEZZA, Francesca, HAUFFMAN, Tom, BJERG, Jesper tataru, SKIRTACH, Andre g., KOCHAN, Kamila, MCKEE, Merrilyn, WOOD, Bayden, BEDOLLA, Diana, GIANONCELLI, Alessandra, GEERLINGS, Nicole m. j., VAN GERVEN, Nani, REMAUT, Han, GEELHOED, Jeanine s., MILLÁN SOLSONA, Rubén, FUMAGALLI, Laura, NIELSEN, Lars peter, FRANQUET, Alexis, MANCA, Jean v., GOMILA LLUCH, Gabriel, MEYSMAN, Filip j. r.. Efficient long-range conduction in cable bacteria through nickel protein wires. _Nature Communications_. 2021. Vol. 12, núm. 1. [consulta: 21 de gener de 2026]. ISSN: 2041-1723. [Disponible a: https://hdl.handle.net/2445/180328]