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Magarelli G, da Silva JG, Ribeiro CL, de Freitas TV, Rodrigues MA, de Souza Gil E, Marraccini P, de Souza JR, de Castro CSP, Bemquerer MP. A voltammetric peptide biosensor for Cu 2+ metal ion quantification in coffee seeds. J Inorg Biochem 2024; 251:112441. [PMID: 38103419 DOI: 10.1016/j.jinorgbio.2023.112441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 11/22/2023] [Accepted: 11/26/2023] [Indexed: 12/19/2023]
Abstract
A prion-derived copper(II)-binding peptide was assembled onto a gold electrode for the building of a voltammetric biosensor for measuring the Cu2+ metal ion in biological samples. The chosen sequence was H-CVNITKQHTVTTTT-NH2, with an appended cysteine residue for binding to the gold surface as a self-assembled monolayer and a histidine residue as the anchorage point for copper(II) complexation. The biosensor showed a linear range of 10-7 to 10-6 M with an 8.0 × 10-8 M detection limit and a 1.0 × 10-7 M quantification limit, with good precision, trueness, and absence of matrix effect. The quantification of Cu2+ was performed in the presence of other transition metal ions, such as Zn2+, Cd2+, Fe2+, or Ni2+, which indicates the excellent selectivity of the biosensor. When the modified electrode was applied for measuring copper(II) in calcined coffee seeds, a difference in copper amount was observed between two Coffea arabica cultivars that were submitted to a treatment with a copper-based antifungal, showing the applicability of the biosensor in the agricultural field.
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Affiliation(s)
- Gabriella Magarelli
- Embrapa Recursos Genéticos e Biotecnologia, Parque Estação Biológica, PqEB, Av. W5 Norte (final) P.O. Box 02372, 70770-917 Brasília, DF, Brazil
| | - Jonatas Gomes da Silva
- Universidade Federal do Oeste da Bahia, Campus Reitor Edgard Santos, 47810-047 Barreiras, BA, Brazil
| | - Caroline Luchtenberg Ribeiro
- Embrapa Recursos Genéticos e Biotecnologia, Parque Estação Biológica, PqEB, Av. W5 Norte (final) P.O. Box 02372, 70770-917 Brasília, DF, Brazil
| | - Thiago Viana de Freitas
- Embrapa Recursos Genéticos e Biotecnologia, Parque Estação Biológica, PqEB, Av. W5 Norte (final) P.O. Box 02372, 70770-917 Brasília, DF, Brazil
| | - Magali Aparecida Rodrigues
- Departamento de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, Cidade Universitária, 05508-000 São Paulo, SP, Brazil
| | - Eric de Souza Gil
- Faculdade de Farmácia, Universidade Federal de Goiás, Setor Universitário, 74605-220 Goiânia, GO, Brazil
| | - Pierre Marraccini
- CIRAD (Centre de Coopération Internationale en Recherche Agronomique Pour de Développement), UMR DIADE, 34398 Montpellier, France.; UMR DIADE (Diversity, Adaptation, Development of Plants), University of Montpellier, CIRAD, IRD, 34398 Montpellier, France
| | - Jurandir Rodrigues de Souza
- Instituto de Química, Universidade de Brasília, Campus Darcy Ribeiro, P.O. Box 4478, 70910900 Brasília, DF, Brazil
| | - Clarissa Silva Pires de Castro
- Embrapa Recursos Genéticos e Biotecnologia, Parque Estação Biológica, PqEB, Av. W5 Norte (final) P.O. Box 02372, 70770-917 Brasília, DF, Brazil
| | - Marcelo Porto Bemquerer
- Embrapa Recursos Genéticos e Biotecnologia, Parque Estação Biológica, PqEB, Av. W5 Norte (final) P.O. Box 02372, 70770-917 Brasília, DF, Brazil; Embrapa Gado de Leite, Rua Eugênio do Nascimento, 610, Dom Bosco, 36038-330 Juiz de Fora, MG, Brazil.
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