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- W3087361489 endingPage "4344" @default.
- W3087361489 startingPage "4336" @default.
- W3087361489 abstract "Vesicles made from functionally folded, globular proteins that perform specific biological activities, such as catalysis, sensing, or therapeutics, show potential applications as artificial cells, microbioreactors, or protein drug delivery vehicles. The mechanical properties of vesicle membranes, including the elastic modulus and hardness, play a critical role in dictating the stability and shape transformation of the vesicles under external stimuli triggers. Herein, we have developed a strategy to tune the mechanical properties and integrity of globular protein vesicle (GPV) membranes of which building molecules are recombinant fusion protein complexes: a mCherry fused with an acidic leucine zipper (mCherry-ZE) and a basic leucine zipper fused with an elastin-like polypeptide (ZR-ELP). To control the mechanical properties of GPVs, we introduced a nonstandard amino acid (para-azidophenylalanine (pAzF)) into the ELP domains (ELP-X), which enabled the creation of crosslinked vesicles under ultraviolet (UV) irradiation. Crosslinked GPVs made from mCherry-ZE/ZR-ELP-X complexes presented higher stability than noncrosslinked GPVs under hypotonic osmotic stress. The degree of swelling of GPVs increased as less crosslinking was achieved in the vesicle membranes, which resulted in the disassembly of GPVs into membraneless coacervates. Nanoindentation by atomic force microscopy (AFM) confirmed that the stiffness and Young’s elastic modulus of GPVs increase as the blending molar ratio of ZR-ELP-X to ZR-ELP increases to make vesicles. The results obtained in this study suggest a rational design to make GPVs with tunable mechanical properties for target applications by simply varying the blending ratio of ZR-ELP and ZR-ELP-X in the vesicle self-assembly." @default.
- W3087361489 created "2020-09-25" @default.
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- W3087361489 date "2020-09-21" @default.
- W3087361489 modified "2023-10-14" @default.
- W3087361489 title "Tuning the Structural Integrity and Mechanical Properties of Globular Protein Vesicles by Blending Crosslinkable and NonCrosslinkable Building Blocks" @default.
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- W3087361489 doi "https://doi.org/10.1021/acs.biomac.0c01147" @default.
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