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- W1977435995 abstract "Elastin is a major structural protein found in large blood vessels, lung, ligaments, and skin, imparting the physical properties of extensibility and elastic recoil to these tissues. To achieve the required structural durability of the elastic matrix, the elastin monomer, tropoelastin, undergoes ordered assembly into a covalently cross-linked, fibrillar polymeric structure. Human tropoelastin consists of 34 exons coding for alternating hydrophobic and cross-linking domains. Using a series of well-defined recombinant polypeptides based on human elastin sequences mimicking native elastin, we have previously investigated the role of sequence and context of hydrophobic domains in elastin self-assembly. Here, we demonstrate that the structure of both cross-linking and hydrophobic domains have significant effects on the assembly of these polypeptides. Removing a putative flexible hinge region in the center of a cross-linking domain substantially increased the α-helical content and strongly promoted their self-aggregation. However, while trifluoroethanol (TFE) promoted and urea inhibited self-assembly of these polypeptides, these effects were not predominantly due to altered α-helicity of the polypeptides. Our results suggest that, while increased α helicity also favors this process, the major effect of TFE to promote organized self-assembly of elastin-like polypeptides is likely related to direct effects of this cosolvent on hydrophobic domains. Such simple elastin polypeptide models can provide an important tool for understanding the relationships between sequence, structure, and polymeric assembly of elastin." @default.
- W1977435995 created "2016-06-24" @default.
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- W1977435995 date "2005-10-06" @default.
- W1977435995 modified "2023-10-18" @default.
- W1977435995 title "Structural Determinants of Cross-linking and Hydrophobic Domains for Self-Assembly of Elastin-like Polypeptides" @default.
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- W1977435995 doi "https://doi.org/10.1021/bi0510173" @default.
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