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The carboxy-terminus of tropoelastin is a highly conserved, atypical region of the molecule with sequences that define both cell and matrix interactions. This domain also plays a critical but unknown role in the assembly and crosslinking of tropoelastin during elastic fiber maturation. Using a competitive ELISA with an antibody to an elastase-resistant epitope in the carboxy-terminus of tropoelastin...
Elastin provides recoil to tissues subjected to repeated stretch, such as blood vessels and the lung. It is encoded by a single gene in mammals and is secreted as a 60–70kDa monomer called tropoelastin. The functional form of the protein is that of a large, highly crosslinked polymer that organizes as sheets or fibers in the extracellular matrix. Purification of mature, crosslinked elastin is problematic...
Elastin is secreted as soluble tropoelastin monomers which are then cross-linked in the presence of extracellular microfibrils to form insoluble elastic fibers. Although the secretion of tropoelastin is thought to be mediated and targeted by an intracellular chaperone complex, the intracellular route taken by this protein and the role of such a chaperone complex remain undefined. In the present study,...
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