Two routes for extracellular electron transfer in Enterococcus faecalis

Lars Hederstedt, Lo Gorton, Galina Pankratova

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskriftPeer review

Sammanfattning

Enterococcus faecalis cells are known to have ferric reductase activity and the ability to transfer electrons generated in metabolism to the external environment. We have isolated mutants defective in ferric reductase activity and studied their electron transfer properties to electrodes mediated by ferric ions and an osmium complex modified redox polymer (OsRP), respectively. Electron transfer mediated with ferric ions and ferric reductase activity were both found dependent on the membrane associated Ndh3 and EetA proteins, consistent with findings in Listeria monocytogenes. In contrast, electron transfer mediated with OsRP was independent of these two proteins. Quinone in the cell membrane was required for the electron transfer with both mediators. The combined results demonstrate that extracellular electron transfer from reduced quinone to ferric ions and to OsRP occurs via different routes in the cell envelope of E. faecalis.
Originalspråkengelska
Artikelnummere00725-19
Antal sidor9
TidskriftJournal of Bacteriology
Volym202
Nummer7
DOI
StatusPublished - 2020 mars 11

Ämnesklassifikation (UKÄ)

  • Biokemi och molekylärbiologi

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