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Acar M, Tatini D, Fidi A, Pacini L, Quagliata M, Nuti F, Papini AM, Lo Nostro P. A Promising Compound for Green Multiresponsive Materials Based on Acyl Carrier Protein. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:12381-12393. [PMID: 38836557 DOI: 10.1021/acs.langmuir.4c00476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2024]
Abstract
A gel that exhibits intrinsically multiple-responsive behavior was prepared from an oligopeptide and studied. ACP(65-74) is an active decapeptide fragment of acyl carrier protein. We investigated 3% w/v ACP(65-74)-NH2 self-healing physical gels in water, glycerol carbonate (GC), and their mixtures. The morphology was investigated by optical, birefringence, and confocal laser scanning microscopy, circular dichroism, Fourier transform infrared, and fluorescence spectroscopy experiments. We found that all samples possess pH responsiveness with fully reversible sol-to-gel transitions. The rheological properties depend on the temperature and solvent composition. The temperature dependence of the gels in water shows a peculiar behavior that is similar to that of thermoresponsive polymer solutions. The results reveal the presence of several β-sheet structures and amyloid aggregates, offering valuable insights into the fibrillation mechanism of amyloids in different solvent media.
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Affiliation(s)
- Mert Acar
- Department of Chemistry "Ugo Schiff", University of Florence, 50019 Sesto Fiorentino (FI), Italy
| | - Duccio Tatini
- Department of Biotechnologies, Chemistry and Pharmacy, University of Siena, 53100 Siena, Italy
| | - Alberto Fidi
- Department of Chemistry "Ugo Schiff", University of Florence, 50019 Sesto Fiorentino (FI), Italy
| | - Lorenzo Pacini
- Department of Chemistry "Ugo Schiff", University of Florence, 50019 Sesto Fiorentino (FI), Italy
- PeptLab, University of Florence, 50019 Sesto Fiorentino (FI), Italy
| | - Michael Quagliata
- Department of Chemistry "Ugo Schiff", University of Florence, 50019 Sesto Fiorentino (FI), Italy
- PeptLab, University of Florence, 50019 Sesto Fiorentino (FI), Italy
| | - Francesca Nuti
- Department of Chemistry "Ugo Schiff", University of Florence, 50019 Sesto Fiorentino (FI), Italy
- PeptLab, University of Florence, 50019 Sesto Fiorentino (FI), Italy
| | - Anna Maria Papini
- Department of Chemistry "Ugo Schiff", University of Florence, 50019 Sesto Fiorentino (FI), Italy
- PeptLab, University of Florence, 50019 Sesto Fiorentino (FI), Italy
| | - Pierandrea Lo Nostro
- Department of Chemistry "Ugo Schiff", University of Florence, 50019 Sesto Fiorentino (FI), Italy
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Glycerol carbonate structuring in aqueous solutions as inferred from mutual diffusion coefficient, density and viscosity measurements in the temperature range 283.15–313.15 K. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119114] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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