NOVELTY - An isolated or recombinant nanowire peptide comprising an amino acid sequence chosen from (a) peptide comprising one of 10(61-76) amino acid sequence (SEQ ID NOs: 1-10) all fully defined in the specification, peptide comprising 52, 42, 41 and 39 amino acid sequence or variants or their combinations (SEQ ID NOs: 26-29) all fully defined in the specification, and (b) peptide that is encoded by nucleotide sequence or its variants comprising 126 base pair sequence (SEQ ID NO: 11) fully defined in the specification, is new.    USE - The isolated or recombinant nanowire peptide is useful in pilus, device (claimed), preferably nanoelectronic devices and fuel cells for soluble metal remediation.    ADVANTAGE - The isolated or recombinant nanowire peptide exhibits and modulates conductive, adhesive, assembly and coupling properties.    DETAILED DESCRIPTION - An isolated or recombinant nanowire peptide comprising an amino acid sequence or variants or their combinations chosen from (a) peptide comprising one of 10(61-76) amino acid sequence (SEQ ID NOs: 1-10) all fully defined in the specification, peptide comprising 52, 42, 41 and 39 amino acid sequence (SEQ ID NOs: 26-29) all fully defined in the specification, (b) peptide that is encoded by nucleotide sequence or its variants comprising 126 base pair sequence (SEQ ID NO: 11) fully defined in the specification, (c) peptide comprising an amino acid sequence exhibiting at least 40% identity to amino acid sequence of SEQ ID NOs: 1-10 or their combinations, and (d) peptide of SEQ ID NOs: 1-10 comprising 1-30 amino acid truncation at N-terminus or at C-terminus, where the polypeptide assembles into the conductive pilus, and (e) peptide comprising an amino acid sequence exhibiting at least 70% identity to amino acid sequence of SEQ ID NOs: 26-29 or their combinations, is new. INDEPENDENT CLAIMS are included for the following:    (1) pilus comprising the above-mentioned nanowire peptide;    (2) isolated host cell comprising the above isolated nucleic acid or a replication or expression vector comprising the above isolated nucleic acid;    (3) device or component comprising one or more genetically or chemically modified nanowire peptides;    (4) method for producing nanowire peptides involves expressing a fusion protein comprising a fusion partner peptide and a nanowire peptide, affinity purifying the fusion protein, and removing the fusion partner peptide from the fusion protein to allow the nanowire peptide to assemble, where the fusion protein is expressed by a host cell, and the nanowire peptides comprise the above isolated or recombinant peptide; and    (5) method for precipitating a soluble metal, involves contacting one or more conductive pili with soluble metal.