New PEPTIR-2.0 Peptide Designed for Use as Recognition Element in Electrochemical Biosensors with Improved Specificity towards E. coli O157:H7
| Autor: | Jose Luis Ropero-Vega, Joshua Felipe Redondo-Ortega, Juliana Paola Rodríguez-Caicedo, Paola Rondón-Villarreal, Johanna Marcela Flórez-Castillo |
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| Přispěvatelé: | Cibas |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Bioinformatics tools
Pathogen PEPTIR-1.0 Organic Chemistry Pharmaceutical Science Water High specificity Analytical Chemistry Chemistry (miscellaneous) Drug Discovery bioinformatics tools pathogen water electrochemical impedance spectroscopy high specificity Molecular Medicine Physical and Theoretical Chemistry Electrochemical impedance spectroscopy |
| Zdroj: | Repositorio Universidad de Santander Universidad de Santander instacron:Universidad de Santander Molecules; Volume 27; Issue 9; Pages: 2704 |
| Popis: | Digital The detection of pathogens through alternative methodologies based on electrochemical biosensors is being studied. These devices exhibit remarkable properties, such as simplicity, specificity, and high sensitivity in monitoring pathogens. However, it is necessary to continue conducting studies that adequately improve these characteristics, especially the recognition molecule. This work aims to design and evaluate a new peptide, named PEPTIR-2.0, as a recognition molecule in electrochemical biosensors to detect E. coli O157:H7 in water. PEPTIR-2.0 was obtained from modifications of the PEPTIR-1.0 peptide sequence, which was previously reported and exhibited excellent properties for detecting and quantifying this pathogenic microorganism. PEPTIR-1.0 is a peptide analogous to the TIR (Translocated Intimin Receptor) protein capable of interacting with the Intimin outer membrane. The basis of this study was to obtain, by using bioinformatics tools, a molecule analogous to PEPTIR-1.0 that maintains its three-dimensional structure but increases the hydrophobic interactions between it and Intimin, since these intermolecular forces are the predominant ones. The designed PEPTIR-2.0 peptide was immobilized on screen-printed electrodes modified with gold nanoparticles. The detection capacity of E. coli O157:H7 in water was evaluated using electrochemical impedance spectroscopy in the presence of other microorganisms, such as P. aeruginosa, S. aureus, and non-pathogenic E. coli. The results showed that PEPTIR-2.0 confers remarkable specificity to the biosensor towards detecting E. coli, even higher than PEPTIR-1.0. Ciencias Exactas y Naturales |
| Databáze: | OpenAIRE |
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