Effect of pH on the Conformational Transition of Silk Fibroin in Aqueous Solution Monitored by Thioflavin-T Fluorescence.
J Fluoresc
; 32(1): 389-395, 2022 Jan.
Article
en En
| MEDLINE
| ID: mdl-34855073
ABSTRACT
In this work, the potential application of the fluorescence dye Thioflavin-T (ThT), which can specifically bind to amyloid, as a powerful tool for monitoring secondary structural transitions of silk fibroin (SF) induced by pH in low solution concentrations was examined. Results showed that ThT emission intensities substantially increased when pH decreased from 6.8 to 4.8. This increase may be ascribed to conformational transitions from random coil to ß-sheet. The morphology and secondary structure of SF were also investigated via TEM, AFM and circular dichroism spectroscopy. The information obtained herein can be utilized not only for the development of convenient and efficient noninvasive method for monitoring the assembly behavior of SF in aqueous solution but also for in vitro fluorescence imaging.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Espectrometría de Fluorescencia
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Agua
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Benzotiazoles
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Fibroínas
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Colorantes Fluorescentes
Idioma:
En
Año:
2022
Tipo del documento:
Article