A synthetic redox biofilm made from metalloprotein-prion domain chimera nanowires.
Nat Chem
; 9(2): 157-163, 2017 02.
Article
em En
| MEDLINE
| ID: mdl-28282052
ABSTRACT
Engineering bioelectronic components and set-ups that mimic natural systems is extremely challenging. Here we report the design of a protein-only redox film inspired by the architecture of bacterial electroactive biofilms. The nanowire scaffold is formed using a chimeric protein that results from the attachment of a prion domain to a rubredoxin (Rd) that acts as an electron carrier. The prion domain self-assembles into stable fibres and provides a suitable arrangement of redox metal centres in Rd to permit electron transport. This results in highly organized films, able to transport electrons over several micrometres through a network of bionanowires. We demonstrate that our bionanowires can be used as electron-transfer mediators to build a bioelectrode for the electrocatalytic oxygen reduction by laccase. This approach opens opportunities for the engineering of protein-only electron mediators (with tunable redox potentials and optimized interactions with enzymes) and applications in the field of protein-only bioelectrodes.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Rubredoxinas
/
Príons
/
Nanofios
/
Metaloproteínas
Idioma:
En
Ano de publicação:
2017
Tipo de documento:
Article