| Full text | |
| Author(s): |
Total Authors: 4
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| Affiliation: | [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 |
| Abstract | |
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 |