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• W2321809554 abstract "Collagen is an important and widely used biomaterial and therapeutic. The construction of large-scale collagen structures via the self-assembly of small collagen-related peptides has been extensively studied in the past decade. Here, we report a highly effective and simple means to assemble small synthetic collagen-related peptides into various higher-order structures by utilizing metal–histidine coordination. In this work, two short collagen-related peptides in which histidine residues were incorporated as metal binding sites were designed and chemically synthesized: HG(PPG)9GH (X9) and HG(PPG)4(PHG)(PPG)4GH (PHG). Circular dichroism measurements indicated that these two peptides form only marginally stable collagen triple helices but that their stability can be increased upon the addition of metal ions. Dynamic light scattering analyses, turbidity measurements, TEM, and SEM results demonstrated the metal ion-dependent self-assembly of X9 and PHG into supramolecular structures ranging from various nanofibrils to microscale spherical, laminated, and granulated assemblies. The topology and size of these higher-order structures depends both on the metal ion identity and the location of the binding sites. Most intriguingly, the assembled fibrils show similar D-periodicity to that of natural collagen. Our results demonstrate that metal–histidine coordination can serve as an effective force to induce the self-assembly of unstable collagen-related peptides into higher-order structures." @default.
• W2321809554 created "2016-06-24" @default.
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• W2321809554 creator A5020418881 @default.
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• W2321809554 date "2012-02-02" @default.
• W2321809554 modified "2023-10-10" @default.
• W2321809554 title "Promoting Self-Assembly of Collagen-Related Peptides into Various Higher-Order Structures by Metal–Histidine Coordination" @default.
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• W2321809554 doi "https://doi.org/10.1021/la204351w" @default.
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