title: Novel non-covalent thrombin inhibitors incorporating P(1) 4,5,6,7-tetrahydrobenzothiazole arginine side chain mimetics.
abstract: The design, synthesis and biological activity of a series of novel non-covalent D-Phe-Pro-Arg motif-based thrombin inhibitors incorporating 4,5,6,7-tetrahydrobenzothiazol-2-amine as a novel arginine surrogate are described. Compound 9, the most potent in the series of thrombin inhibitors, exhibited an in vitro K(i) of 128 nM and 342-fold selectivity against trypsin. The binding mode of this novel class of thrombin inhibitors in the enzyme active site, based on the X-ray crystal structure of compound 9 co-crystallized with human alpha-thrombin, is discussed.
authors.affiliation: Faculty of Pharmacy, University of Ljubljana, Askerceva 7, 1000 Ljubljana, Slovenia.
authors.forename: Petra
authors.initials: P
authors.lastname: Marinko
authors.forename: Ales
authors.initials: A
authors.lastname: Krbavcic
authors.forename: Gregor
authors.initials: G
authors.lastname: Mlinsek
authors.forename: Tomaz
authors.initials: T
authors.lastname: Solmajer
authors.forename: Alenka Trampus
authors.initials: AT
authors.lastname: Bakija
authors.forename: Mojca
authors.initials: M
authors.lastname: Stegnar
authors.forename: Jure
authors.initials: J
authors.lastname: Stojan
authors.forename: Danijel
authors.initials: D
authors.lastname: Kikelj
mesh_terms: D001120:Arginine / Q000737:chemistry*; D001665:Binding Sites; D040761:Biomimetic Materials / Q000737:chemistry / Q000494:pharmacology*; D018360:Crystallography, X-Ray; D004791:Enzyme Inhibitors / Q000737:chemistry* / Q000494:pharmacology*; D006801:Humans; D008958:Models, Molecular; D015394:Molecular Structure; D011485:Protein Binding; D013329:Structure-Activity Relationship; D013379:Substrate Specificity; D013844:Thiazoles / Q000494:pharmacology*; D013917:Thrombin / Q000037:antagonists & inhibitors* / Q000378:metabolism; D014357:Trypsin / Q000378:metabolism*
chemical_list: D004791:Enzyme Inhibitors; D013844:Thiazoles; D001120:Arginine; D014357:Trypsin; D013917:Thrombin