title: The decorin sequence SYIRIADTNIT binds collagen type I.
abstract: Decorin belongs to the small leucine-rich repeat proteoglycan family, interacts with fibrillar collagens, and regulates the assembly, structure, and biomechanical properties of connective tissues. The decorin-collagen type I-binding region is located in leucine-rich repeats 5-6. Site-directed mutagenesis of this 54-residue-long collagen-binding sequence identifies Arg-207 and Asp-210 in leucine-rich repeat 6 as crucial for the binding to collagen. The synthetic peptide SYIRIADTNIT, which includes Arg-207 and Asp-210, inhibits the binding of full-length recombinant decorin to collagen in vitro. These collagen-binding amino acids are exposed on the exterior of the beta-sheet-loop structure of the leucine-rich repeat. This resembles the location of interacting residues in other leucine-rich repeat proteins.
authors.affiliation: Department of Experimental Medical Science, University of Lund, SE-221 84 Lund, Sweden.
authors.forename: Sebastian
authors.initials: S
authors.lastname: Kalamajski
authors.forename: Anders
authors.initials: A
authors.lastname: Aspberg
authors.forename: Ake
authors.initials: A
authors.lastname: Oldberg
mesh_terms: D000595:Amino Acid Sequence / Q000235:genetics; D019943:Amino Acid Substitution; D000818:Animals; D001120:Arginine / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D002417:Cattle; D024042:Collagen Type I / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D058575:Decorin; D016326:Extracellular Matrix Proteins / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D016297:Mutagenesis, Site-Directed; D011485:Protein Binding; D011509:Proteoglycans / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D011994:Recombinant Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism
chemical_list: D024042:Collagen Type I; D058575:Decorin; D016326:Extracellular Matrix Proteins; D011509:Proteoglycans; D011994:Recombinant Proteins; D001120:Arginine