2JEW

Crystal structure of ((2S)-5-amino-2-((1-n-propyl-1H-imidazol-4-yl) methyl)pentanoic acid) UK396,082 a TAFIa inhibitor, Bound to Activated Porcine Pancreatic carboxypeptidaseB

Summary for 2JEW

• Entry DOI: 10.2210/pdb2jew/pdb
• Related: 1NSA 1PBA 1Z5R 1ZG7 1ZG8 1ZG9
• Descriptor: CARBOXYPEPTIDASE B, ZINC ION, (2S)-5-AMINO-2-[(1-PROPYL-1H-IMIDAZOL-4-YL)METHYL]PENTANOIC ACID, ... (4 entities in total)
• Functional Keywords: carboxypeptidase, carboxypeptidase b, direct metal-binding, metalloprotease, protease, hydrolase, zinc, zymogen, exopeptidase
• Biological source: SUS SCROFA (PIG)
• Cellular location: Secreted : P09955
• Total number of polymer chains: 1
• Total formula weight: 35109.99

Authors

Brown, D.G.,Moore, R.S. (deposition date: 2007-01-24, release date: 2007-11-20, Last modification date: 2024-11-20)

Primary citation

Bunnage, M.E.,Blagg, J.,Steele, J.,Owen, D.R.,Allerton, C.,McElroy, A.B.,Miller, D.,Ringer, T.,Butcher, K.,Beaumont, K.,Evans, K.,Gray, A.J.,Holland, S.J.,Feeder, N.,Moore, R.S.,Brown, D.G.
Discovery of potent & selective inhibitors of activated thrombin-activatable fibrinolysis inhibitor for the treatment of thrombosis.
J. Med. Chem., 50:6095-6103, 2007

PubMed Abstract: Thrombin-activatable fibrinolysis inhibitor (TAFI) has emerged as a key link between the coagulation and fibrinolysis cascades and represents a promising new target for the treatment of thrombosis. A novel series of imidazolepropionic acids has been designed that exhibit high potency against activated TAFI (TAFIa) and excellent selectivity over plasma carboxypeptidase N (CPN). Structure activity relationships suggest that the imidazole moiety plays a key role in binding to the catalytic zinc of TAFIa, and this has been supported by crystallographic studies using porcine pancreatic carboxypeptidase B as a surrogate for TAFIa. The SAR program led to the identification of 21 (TAFIa Ki = 10 nM, selectivity TAFIa/CPN > 1000) as a candidate for clinical development. Compound 21 exhibited antithrombotic efficacy in a rabbit model of venous thrombosis, yet had no effect on surgical bleeding in the rabbit. In addition, 21 exhibited an excellent preclinical and clinical pharmacokinetic profile, characterized by paracellular absorption, low clearance, and a low volume of distribution, fully consistent with its physicochemical properties of low molecular weight (MW = 239) and high hydrophilicity (log D = -2.8). These data indicate 21 (UK-396,082) has potential as a novel TAFIa inhibitor for the treatment of thrombosis and other fibrin-dependent diseases in humans.

PubMed: 17990866
DOI: 10.1021/jm0702433

Experimental method

X-RAY DIFFRACTION (1.4 Å)