Communication in a Protein Stack: Electron Transfer between Cytochrome c and Bilirubin Oxidase within a Polyelectrolyte Multilayer

Abstract

Assemblies of proteins and enzymes can serve as a model for mimicking biological signal transfer. A polyelectrolyte multilayer (see picture) of an electron‐transfer protein (cytochrome c, red) and a copper enzyme (bilirubin oxidase, blue) has catalytic properties for four‐electron oxygen reduction. The proposed architecture guarantees efficient protein–protein interaction without an additional redox mediator.

Swelling of electrochemically active polyelectrolyte multilayers

“…Other groups incorporate Heme proteins in the PEMs (e.g. cytochrome C [91,96], myoglobin [97,98]) or try to mimic biological signal chains by the assembly of protein stacks [99][100][101]. Although many measurements involving these systems are conducted using pure electrochemical methods often optical techniques, such as surface plasmon resonance spectroscopy are used as complementary methods [98,102].…”

Carbon nanotube–hydroxyapatite nanocomposite: A novel platform for glucose/O2 biofuel cell

“…The enzymatic BFCs have attracted considerable research attention in recent years because of its unique advantages such as corrosion-free electrolyte and more moderate temperature (Barton et al, 2004;Kim et al, 2004;Shleev et al, 2005;Yuhashi et al, 2005;Bullen et al, 2006;Kang et al, 2006;Tominaga et al, 2006;Davis and Higson, 2007;Dronov et al, 2007Dronov et al, , 2008Gao et al, 2007;Habrioux et al, 2007;Lim et al, 2007;Otsuka et al, 2007;Yan et al, 2007;Togo et al, 2008;Zhou et al, 2009). Multi-copper oxidase, i.e.…”

A simple biofuel cell cathode with human red blood cells as electrocatalysts for oxygen reduction reaction

“…glucose as the fuel and enzymes as the electrocatalysts, can be utilized at the electrode (Halámková et al, 2012;Zebda et al, 2009;Nazaruk et al, 2008;Togo et al, 2008). Various kinds of enzyme proteins, such as families of dehydrogenases, oxidases, peroxidases, etc., have been examined as the electrocatalysts both of the anode and the cathode, thus, the fuel cell reaction proceeds via a wide variety of the chemical reaction and the electron transfer process at the electrode in the field of BFCs (Rasmussen et al, 2012;Prakash et al, 2009;Drobov et al, 2008;Brunel et al, 2007;Kamitaka et al, 2007;Ikeda and Kano, 2003;Tsujimura et al, 2001;Katz et al, 1999;Gorton et al 1999;Palmore et al, 1998).…”