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- W2968477000 abstract "Understanding the self-assembly process of amyloidogenic protein is valuable not only to find its pathological implication but also to prepare protein-based biomaterials. α-Synuclein (αS), a pathological component of Parkinson's disease, producing one-dimensional (1D) amyloid fibrils, has been employed to generate two-dimensional (2D) protein films by encouraging an alternative self-assembly process. At a high temperature of 50 °C, αS molecules self-assembled into 2D films instead of 1D amyloid fibrils, whereas the fibrils were the major product at 37 °C. Based on circular dichroism and Fourier transform infrared spectroscopy analyses, the film was produced via a structural transition from the initial random to still undefined but mostly the turn or loop structure, which was distinctive from the β-sheet formation observed with the amyloid fibrils. The αS 2D film was also routinely prepared at the oil-water interface and used as a matrix to produce polydiacetylene-based sensing materials. 10,12-Pentacosadiynoic acids (PCDA) were aligned on the film and photopolymerized to form a π-conjugated molecular assembly yielding a blue color. Its colorimetric transition to red was induced by increasing the temperature. This functionalized protein film increased its height from 40 to 55 nm upon PCDA immobilization and exhibited enhanced physical and chemical stability. In addition, the modified film showed remarkably high electrical conductivity only in the red state. This film, therefore, can be considered as a robust protein-based hybrid biomaterial capable of simultaneously recognizing various external stimuli (heat, pH, and solvents) with changes in color and conductivity, and it is expected to be utilized as a basic material for the development of biocompatible sensors." @default.
- W2968477000 created "2019-08-22" @default.
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- W2968477000 date "2019-08-16" @default.
- W2968477000 modified "2023-09-26" @default.
- W2968477000 title "Alternative Assembly of α-Synuclein Leading to Protein Film Formation and Its Application for Developing Polydiacetylene-Based Sensing Materials" @default.
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- W2968477000 doi "https://doi.org/10.1021/acs.langmuir.9b01593" @default.
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