The subject of the invention is an electroconducting nanowire, comprising an amyloid fibre which results from the self-assemblage of peptides comprising a prion domain or a derivative of this domain and which is functionalized by electron transporting peptides, each comprising amino acides bound to one or more atoms of iron. Its subject is also a method of manufacturing this nanowire as well as the uses of said nanowire. Uses: manufacture of sensors for the detection of chemical or biological species, of nano-batteries, of radio-identification systems, of molecular memory systems, etc.