• KKSand

The chemical structure and electron transport mechanism of periplasmic bacterial wires

Check out our pre-print:

Efficient long-range conduction in cable bacteria through nickel protein wires.

We combined high-resolution microscopy, spectroscopy, and chemical imaging on individual cable bacterium filaments and demonstrate that the periplasmic wires consist of a conductive protein core surrounded by an insulating 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 suggests a hitherto unknown form of electron transport that enables efficient conduction in centimeter-long protein structures.


Thanks lots to Eric for compiling all our data and leading the efforts. Is has been a highly inspirational journey.


©2020 by Karina K. Sand

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