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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The role of extracellular polymeric substance matrix on Saccharomyces cerevisiae bioelectricity

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Sedenho, Graziela C. [1] ; Modenez, Iago [1] ; Mendes, Giovana R. [1] ; Crespilho, Frank N. [1]
Total Authors: 4
[1] Univ Sao Paulo, Sao Carlos Inst Chem, BR-13560970 Sao Carlos, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Electrochimica Acta; v. 393, OCT 10 2021.
Web of Science Citations: 0

Saccharomyces cerevisiae is one of the first microorganism established to be able to convert chemical energy into electricity, however its extracellular electron transfer (EET) mechanism was still unclear. Here, we show how yeast strains extracellularly transfer electron to an electrode surface. We observed yeast cells adsorption on solid surfaces occurs through the extracellular polymeric substance (EPS) network, and EET process takes place by redox species mostly confined on the electrode surface. We demonstrated that a flavoprotein is present in the Saccharomyces cerevisiae s acute accent EPS and is responsible by non-diffusive extracellular electron transfer through the EPS electroactive microenvironment. It is proposed EPS acts as a polyelectrolyte for multistep electron-transfer between flavoproteins and consequently for the Saccharomyces cerevisiae EET and bioelectricity generation. The elucidation of this mechanism combined to electrode engineering can contribute to the advance of biosystems in green energy generation, such as microbial fuels. (c) 2021 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 20/10724-0 - Biomolecules dynamic in solid surfaces using spectromicroscopy
Grantee:Giovana Rossi Mendes
Support Opportunities: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 18/22214-6 - Towards a convergence of technologies: from sensing and biosensing to information visualization and machine learning for data analysis in clinical diagnosis
Grantee:Osvaldo Novais de Oliveira Junior
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 19/15333-1 - Bio-photo-electrochemical hybrid cells for solar energy conversion
Grantee:Frank Nelson Crespilho
Support Opportunities: Regular Research Grants
FAPESP's process: 15/22973-6 - Development of Microbial Fuel Biocells for Bioproduction and Oxidation of Ethanol
Grantee:Graziela Cristina Sedenho
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 19/12053-8 - High performance electrodes applied in organic batteries and in biofuel cell
Grantee:Frank Nelson Crespilho
Support Opportunities: Regular Research Grants