title: Inhibitory effects of enzymatic hydrolysates of collagen and collagen-related synthetic peptides on fibrinogen/thrombin clotting.
abstract: Inhibitory effects of some enzymatic hydrolysates of collagen and collagen-related synthetic peptides on fibrinogen/thrombin clotting were investigated. The hydrolysate of porcine skin collagen with thermolysin or bacterial collagenase inhibited fibrinogen/thrombin clotting, but did not inhibit the activity of thrombin. Although the activity was not pronounced, the hydrolysate of collagen with such proteinases as trypsin and pepsin also inhibited the clotting. Gly-Pro-Arg, which is a known inhibitor of fibrinogen/thrombin clotting, was isolated from the bacterial collagenase hydrolysate of porcine collagen by HPLC. Collagen-related synthetic peptides such as Gly-Pro-Arg-Gly, Gly-Pro-Arg-Gly-Pro, Gly-Pro-Arg-Gly-Pro-Ala, Gly-Pro-Arg-Gly-Pro-Pro, and Gly-Pro-Arg-Pro-Pro also inhibited the clotting, but did not inhibit the activity of thrombin. The inhibitory activity of Gly-Pro-Arg-Gly-Pro-Pro and Gly-Pro-Arg-Pro-Pro was more marked than that of Gly-Pro-Arg. However, Gly-Pro-Lys, Gly-Ala-Arg, Gly-Pro-Hyp, Ala-Gly-Pro-Arg and Gly-Pro-Ala-Gly-Pro-Arg had no inhibitory effect on the clotting.
authors.affiliation: Department of Biomolecular Engineering, National Institute of Biosciences and Human-Technology, Ibaraki, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Maruyama
authors.forename: I
authors.initials: I
authors.lastname: Nonaka
authors.forename: H
authors.initials: H
authors.lastname: Tanaka
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001777:Blood Coagulation / Q000187:drug effects; D002417:Cattle; D003094:Collagen / Q000378:metabolism*; D017364:Collagenases; D005340:Fibrinogen / Q000378:metabolism*; D008969:Molecular Sequence Data; D009842:Oligopeptides / Q000494:pharmacology; D010455:Peptides / Q000302:isolation & purification / Q000494:pharmacology*; D013552:Swine; D013917:Thrombin / Q000378:metabolism*
chemical_list: D009842:Oligopeptides; D010455:Peptides; D005340:Fibrinogen; D003094:Collagen; D013917:Thrombin; D017364:Collagenases