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Electrochemical Characterization of Respiratory Complex I Reconstituted on a Supported Biomimetic Membrane over a Gold Electrode

AuthorsLópez de Lacey, Antonio ; Gutiérrez-Sanz, Óscar ; Olea, David ; Pita, Marcos ; Batista, Ana P.; Pereira, Manuela M.; Vélez, Marisela
Issue DateSep-2014
Citation65th Annual Meeting of the International Society of Electrochemistry (2014)
AbstractNADH: quinone oxidoreductase, which is also known as respiratory complex I, is a membrane-bound enzyme that has an essential function in cellular energy production. It couples NADH:quinone oxidoreduction to translocation of protons across the cellular (in prokaryotes) or mitochondrial membranes. Therefore, complex I contributes to the establishment and maintenance of the proton motive force required for ATP synthesis, transport and motility. In addition, by reducing the quinone pool inside the membrane, the enzyme allows electron transport to the next enzymatic complex of the respiratory chain. We have developed a strategy for reconstituting the structure and functionality of the bacterial complex I from Rhodothermus marinus onto a biomimetic membrane supported on gold electrodes modified with a thiol self-assembled monolayer (SAM). We show that this modified electrode allows us to study both the electron transfer and the proton translocation by the enzyme, simulating the in vivo conditions, using electrochemical methods.
DescriptionTrabajo presentado en la 65th Annual Meeting of the International Society of Electrochemistry (ISE), celebrada en Lausanne del 31 de agosto al 5 de septiembre de 2017.
Appears in Collections:(ICP) Comunicaciones congresos
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