51
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Quesada-Soriano I, Parker LJ, Primavera A, Casas-Solvas JM, Vargas-Berenguel A, Barón C, Morton CJ, Mazzetti AP, Lo Bello M, Parker MW, García-Fuentes L. Influence of the H-site residue 108 on human glutathione transferase P1-1 ligand binding: structure-thermodynamic relationships and thermal stability. Protein Sci 2010; 18:2454-70. [PMID: 19780048 DOI: 10.1002/pro.253] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The effect of the Y108V mutation of human glutathione S-transferase P1-1 (hGST P1-1) on the binding of the diuretic drug ethacrynic acid (EA) and its glutathione conjugate (EASG) was investigated by calorimetric, spectrofluorimetric, and crystallographic studies. The mutation Tyr 108 --> Val resulted in a 3D-structure very similar to the wild type (wt) enzyme, where both the hydrophobic ligand binding site (H-site) and glutathione binding site (G-site) are unchanged except for the mutation itself. However, due to a slight increase in the hydrophobicity of the H-site, as a consequence of the mutation, an increase in the entropy was observed. The Y108V mutation does not affect the affinity of EASG for the enzyme, which has a higher affinity (K(d) approximately 0.5 microM) when compared with those of the parent compounds, K(d) (EA) approximately 13 microM, K(d) (GSH) approximately 25 microM. The EA moiety of the conjugate binds in the H-site of Y108V mutant in a fashion completely different to those observed in the crystal structures of the EA or EASG wt complex structures. We further demonstrate that the Delta C(p) values of binding can also be correlated with the potential stacking interactions between ligand and residues located in the binding sites as predicted from crystal structures. Moreover, the mutation does not significantly affect the global stability of the enzyme. Our results demonstrate that calorimetric measurements maybe useful in determining the preference of binding (the binding mode) for a drug to a specific site of the enzyme, even in the absence of structural information.
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Affiliation(s)
- Indalecio Quesada-Soriano
- Physical Chemistry, Faculty of Experimental Sciences, University of Almería, La Cañada de San Urbano, 04120 Almería, Spain
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52
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Adding calorimetric data to decision making in lead discovery: a hot tip. Nat Rev Drug Discov 2009; 9:23-7. [DOI: 10.1038/nrd3054] [Citation(s) in RCA: 318] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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53
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Kolb P, Ferreira RS, Irwin JJ, Shoichet BK. Docking and chemoinformatic screens for new ligands and targets. Curr Opin Biotechnol 2009; 20:429-36. [PMID: 19733475 DOI: 10.1016/j.copbio.2009.08.003] [Citation(s) in RCA: 133] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2009] [Accepted: 08/05/2009] [Indexed: 12/13/2022]
Abstract
Computer-based docking screens are now widely used to discover new ligands for targets of known structure; in the last two years alone, the discovery of ligands for more than 20 proteins has been reported. Recently, investigators have also turned to predicting new substrates for enzymes of unknown function, taking docking in a wholly new direction. Increasingly, the hit rates, the true-positives, and the false-positives from the docking screens are being compared to those from empirical, high-throughput screens, revealing the strengths, weaknesses, and complementarities of both techniques. The recent efflorescence of GPCR structures has made these quintessential drug targets available to structure-based approaches. Consistent with their 'druggability', the docking screens have returned high hit rates and potent molecules. Finally, in the last several years, an approach almost exactly opposite to docking has also appeared; this pharmacological network approach begins not with the structure of the target but rather those of drug molecules and asks, given a pattern of chemistry in the ligands, what targets may a particular drug bind to? This method, which returns to an older, pharmacology logic, has been surprisingly successful in predicting new 'off-targets' for established drugs.
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Affiliation(s)
- Peter Kolb
- Dept of Pharmaceutical Chemistry, University of California, San Francisco, 1700 4th St., Byers Hall Room 508D, San Francisco, CA 94158-2550, United States
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54
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Mulakala C, Kaznessis YN. Path-integral method for predicting relative binding affinities of protein-ligand complexes. J Am Chem Soc 2009; 131:4521-8. [PMID: 19275144 DOI: 10.1021/ja807460s] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We present a novel approach for computing biomolecular interaction binding affinities based on a simple path integral solution of the Fokker-Planck equation. Computing the free energy of protein-ligand interactions can expedite structure-based drug design. Traditionally, the problem is seen through the lens of statistical thermodynamics. The computations can become, however, prohibitively long for the change in the free energy upon binding to be determined accurately. In this work, we present a different approach based on a stochastic kinetic formalism. Inspired by Feynman's path integral formulation, we extend the theory to classical interacting systems. The ligand is modeled as a Brownian particle subjected to the effective nonbonding interaction potential of the receptor. This allows the calculation of the relative binding affinities of interacting biomolecules in water to be computed as a function of the ligand's diffusivity and the curvature of the potential surface in the vicinity of the binding minimum. The calculation is thus exceedingly rapid. In test cases, the correlation coefficient between actual and computed free energies is >0.93 for accurate data sets.
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Affiliation(s)
- Chandrika Mulakala
- Department of Chemical Engineering and Materials Science, 151 Amundson Hall, 421 Washington Avenue SE, University of Minnesota, Minneapolis, Minnesota 55455, USA
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55
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Structure-Based Optimization of Aldose Reductase Inhibitors Originating from Virtual Screening. ChemMedChem 2009; 4:809-19. [DOI: 10.1002/cmdc.200800410] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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56
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Bjelić S, Jelesarov I. A survey of the year 2007 literature on applications of isothermal titration calorimetry. J Mol Recognit 2008; 21:289-312. [PMID: 18729242 DOI: 10.1002/jmr.909] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Elucidation of the energetic principles of binding affinity and specificity is a central task in many branches of current sciences: biology, medicine, pharmacology, chemistry, material sciences, etc. In biomedical research, integral approaches combining structural information with in-solution biophysical data have proved to be a powerful way toward understanding the physical basis of vital cellular phenomena. Isothermal titration calorimetry (ITC) is a valuable experimental tool facilitating quantification of the thermodynamic parameters that characterize recognition processes involving biomacromolecules. The method provides access to all relevant thermodynamic information by performing a few experiments. In particular, ITC experiments allow to by-pass tedious and (rarely precise) procedures aimed at determining the changes in enthalpy and entropy upon binding by van't Hoff analysis. Notwithstanding limitations, ITC has now the reputation of being the "gold standard" and ITC data are widely used to validate theoretical predictions of thermodynamic parameters, as well as to benchmark the results of novel binding assays. In this paper, we discuss several publications from 2007 reporting ITC results. The focus is on applications in biologically oriented fields. We do not intend a comprehensive coverage of all newly accumulated information. Rather, we emphasize work which has captured our attention with originality and far-reaching analysis, or else has provided ideas for expanding the potential of the method.
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Affiliation(s)
- Sasa Bjelić
- Biochemisches Institut der Universität Zürich, Winterthurerstrasse 190, Zürich, Switzerland
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57
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Snow CD. Hunting for predictive computational drug-discovery models. Expert Rev Anti Infect Ther 2008; 6:291-3. [PMID: 18588493 DOI: 10.1586/14787210.6.3.291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The Keystone Symposium on Computer-Aided Drug Design was held at Steamboat Springs (CO, USA), from March 29th to the 3rd of April, 2008. The organizers brought together approximately 180 participants, representing a cross-section of viewpoints from academia and the pharmaceutical industry. Since it is a young discipline, it was a privilege to have a keynote introduction from one of the original pioneers of the field, Irwin Kuntz. By avoiding pitfalls, and addressing active debates, the young field can become more reliably predictive. Accordingly, this report focuses on best practices. As reliability improves, drug-discovery programs will increasingly use models to determine which high-throughput screens to run.
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Affiliation(s)
- Christopher D Snow
- Frances H Arnold Research Group, Department of Chemical Engineering, 1200 E California Boulevard, MC 210-41, Pasadena, CA, USA.
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58
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La Motta C, Sartini S, Salerno S, Simorini F, Taliani S, Marini AM, Da Settimo F, Marinelli L, Limongelli V, Novellino E. Acetic Acid Aldose Reductase Inhibitors Bearing a Five-Membered Heterocyclic Core with Potent Topical Activity in a Visual Impairment Rat Model. J Med Chem 2008; 51:3182-93. [DOI: 10.1021/jm701613h] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Concettina La Motta
- Dipartimento di Scienze Farmaceutiche, Università di Pisa, Via Bonanno 6, 56126 Pisa, Italy, Dipartimento di Chimica Farmaceutica e Tossicologica, Università di Napoli “Federico II”, Via D. Montesano 49, 80131 Napoli, Italy
| | - Stefania Sartini
- Dipartimento di Scienze Farmaceutiche, Università di Pisa, Via Bonanno 6, 56126 Pisa, Italy, Dipartimento di Chimica Farmaceutica e Tossicologica, Università di Napoli “Federico II”, Via D. Montesano 49, 80131 Napoli, Italy
| | - Silvia Salerno
- Dipartimento di Scienze Farmaceutiche, Università di Pisa, Via Bonanno 6, 56126 Pisa, Italy, Dipartimento di Chimica Farmaceutica e Tossicologica, Università di Napoli “Federico II”, Via D. Montesano 49, 80131 Napoli, Italy
| | - Francesca Simorini
- Dipartimento di Scienze Farmaceutiche, Università di Pisa, Via Bonanno 6, 56126 Pisa, Italy, Dipartimento di Chimica Farmaceutica e Tossicologica, Università di Napoli “Federico II”, Via D. Montesano 49, 80131 Napoli, Italy
| | - Sabrina Taliani
- Dipartimento di Scienze Farmaceutiche, Università di Pisa, Via Bonanno 6, 56126 Pisa, Italy, Dipartimento di Chimica Farmaceutica e Tossicologica, Università di Napoli “Federico II”, Via D. Montesano 49, 80131 Napoli, Italy
| | - Anna Maria Marini
- Dipartimento di Scienze Farmaceutiche, Università di Pisa, Via Bonanno 6, 56126 Pisa, Italy, Dipartimento di Chimica Farmaceutica e Tossicologica, Università di Napoli “Federico II”, Via D. Montesano 49, 80131 Napoli, Italy
| | - Federico Da Settimo
- Dipartimento di Scienze Farmaceutiche, Università di Pisa, Via Bonanno 6, 56126 Pisa, Italy, Dipartimento di Chimica Farmaceutica e Tossicologica, Università di Napoli “Federico II”, Via D. Montesano 49, 80131 Napoli, Italy
| | - Luciana Marinelli
- Dipartimento di Scienze Farmaceutiche, Università di Pisa, Via Bonanno 6, 56126 Pisa, Italy, Dipartimento di Chimica Farmaceutica e Tossicologica, Università di Napoli “Federico II”, Via D. Montesano 49, 80131 Napoli, Italy
| | - Vittorio Limongelli
- Dipartimento di Scienze Farmaceutiche, Università di Pisa, Via Bonanno 6, 56126 Pisa, Italy, Dipartimento di Chimica Farmaceutica e Tossicologica, Università di Napoli “Federico II”, Via D. Montesano 49, 80131 Napoli, Italy
| | - Ettore Novellino
- Dipartimento di Scienze Farmaceutiche, Università di Pisa, Via Bonanno 6, 56126 Pisa, Italy, Dipartimento di Chimica Farmaceutica e Tossicologica, Università di Napoli “Federico II”, Via D. Montesano 49, 80131 Napoli, Italy
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59
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Steuber H, Heine A, Podjarny A, Klebe G. Merging the binding sites of aldose and aldehyde reductase for detection of inhibitor selectivity-determining features. J Mol Biol 2008; 379:991-1016. [PMID: 18495158 DOI: 10.1016/j.jmb.2008.03.063] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2007] [Revised: 03/01/2008] [Accepted: 03/25/2008] [Indexed: 11/18/2022]
Abstract
Inhibition of human aldose reductase (ALR2) evolved as a promising therapeutic concept to prevent late complications of diabetes. As well as appropriate affinity and bioavailability, putative inhibitors should possess a high level of selectivity for ALR2 over the related aldehyde reductase (ALR1). We investigated the selectivity-determining features by gradually mapping the residues deviating between the binding pockets of ALR1 and ALR2 into the ALR2 binding pocket. The resulting mutational constructs of ALR2 (eight point mutations and one double mutant) were probed for their influence towards ligand selectivity by X-ray structure analysis of the corresponding complexes and isothermal titration calorimetry (ITC). The binding properties of these mutants were evaluated using a ligand set of zopolrestat, a related uracil derivative, IDD388, IDD393, sorbinil, fidarestat and tolrestat. Our study revealed induced-fit adaptations within the mutated binding site as an essential prerequisite for ligand accommodation related to the selectivity discrimination of the ligands. However, our study also highlights the limits of the present understanding of protein-ligand interactions. Interestingly, binding site mutations not involved in any direct interaction to the ligands in various cases show significant effects towards their binding thermodynamics. Furthermore, our results suggest the binding site residues deviating between ALR1 and ALR2 influence ligand affinity in a complex interplay, presumably involving changes of dynamic properties and differences of the solvation/desolvation balance upon ligand binding.
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Affiliation(s)
- Holger Steuber
- Department of Pharmaceutical Chemistry, Philipps-University Marburg, Marbacher Weg 6, 35032 Marburg, Germany
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60
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Anderka O, Loenze P, Klabunde T, Dreyer MK, Defossa E, Wendt KU, Schmoll D. Thermodynamic Characterization of Allosteric Glycogen Phosphorylase Inhibitors. Biochemistry 2008; 47:4683-91. [DOI: 10.1021/bi702397d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Oliver Anderka
- Research and Development, Sanofi Aventis Deutschland GmbH, D-65926 Frankfurt am Main, Germany
| | - Petra Loenze
- Research and Development, Sanofi Aventis Deutschland GmbH, D-65926 Frankfurt am Main, Germany
| | - Thomas Klabunde
- Research and Development, Sanofi Aventis Deutschland GmbH, D-65926 Frankfurt am Main, Germany
| | - Matthias K. Dreyer
- Research and Development, Sanofi Aventis Deutschland GmbH, D-65926 Frankfurt am Main, Germany
| | - Elisabeth Defossa
- Research and Development, Sanofi Aventis Deutschland GmbH, D-65926 Frankfurt am Main, Germany
| | - K. Ulrich Wendt
- Research and Development, Sanofi Aventis Deutschland GmbH, D-65926 Frankfurt am Main, Germany
| | - Dieter Schmoll
- Research and Development, Sanofi Aventis Deutschland GmbH, D-65926 Frankfurt am Main, Germany
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61
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Webb LJ, Boxer SG. Electrostatic Fields Near the Active Site of Human Aldose Reductase: 1. New Inhibitors and Vibrational Stark Effect Measurements. Biochemistry 2008; 47:1588-98. [DOI: 10.1021/bi701708u] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Lauren J. Webb
- Department of Chemistry, Stanford University, Stanford, California 94305-5080
| | - Steven G. Boxer
- Department of Chemistry, Stanford University, Stanford, California 94305-5080
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62
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Köhler K, Hillebrecht A, Schulze Wischeler J, Innocenti A, Heine A, Supuran C, Klebe G. Saccharin hemmt Carboanhydrasen: eine mögliche Erklärung für seinen unangenehmen metallischen Nachgeschmack. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200701189] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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63
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Köhler K, Hillebrecht A, Schulze Wischeler J, Innocenti A, Heine A, Supuran CT, Klebe G. Saccharin Inhibits Carbonic Anhydrases: Possible Explanation for its Unpleasant Metallic Aftertaste. Angew Chem Int Ed Engl 2007; 46:7697-9. [PMID: 17705204 DOI: 10.1002/anie.200701189] [Citation(s) in RCA: 139] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Karen Köhler
- Institut für Pharmazeutische Chemie, Philipps-Universität Marburg, Marbacher Weg 6, 35032 Marburg, Germany
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64
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Steuber H, Czodrowski P, Sotriffer CA, Klebe G. Tracing changes in protonation: a prerequisite to factorize thermodynamic data of inhibitor binding to aldose reductase. J Mol Biol 2007; 373:1305-20. [PMID: 17905306 DOI: 10.1016/j.jmb.2007.08.063] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2007] [Revised: 08/25/2007] [Accepted: 08/29/2007] [Indexed: 11/17/2022]
Abstract
To prevent diabetic complications derived from enhanced glucose flux via the polyol pathway the development of aldose reductase inhibitors (ARIs) has been established as a promising therapeutic concept. Here, we study the binding process of inhibitors to aldose reductase (ALR2) with respect to changes of the protonation inventory upon complex formation. Knowledge of such processes is a prerequisite to factorize the binding free energy into enthalpic and entropic contributions on an absolute scale. Our isothermal titration calorimetry (ITC) measurements suggest a proton uptake upon complex formation with carboxylate-type inhibitors. As the protonation event will contribute strongly to the enthalpic signal recorded during ITC experiments, knowledge about the proton-accepting and releasing functional groups of the system is of utmost importance. However, this is intricate to retrieve, if, as in the present case, both, binding site and ligand possess several titratable groups. Here, we present pKa calculations complemented by mutagenesis and thermodynamic measurements suggesting a tyrosine residue located in the catalytic site (Tyr48) as a likely candidate to act as proton acceptor upon inhibitor binding, as it occurs deprotonated to a remarkable extent if only the cofactor NADP+ is bound. We furthermore provide evidence that the protonation state and binding thermodynamics depend strongly on the oxidation state of the cofactor;s nicotinamide moiety. Binding thermodynamics of IDD 388, IDD 393, tolrestat, sorbinil, and fidarestat are discussed in the context of substituent effects.
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Affiliation(s)
- Holger Steuber
- Department of Pharmaceutical Chemistry, Philipps-University Marburg, Marbacher Weg 6, 35032 Marburg, Germany
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65
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Maccari R, Ottanà R, Ciurleo R, Vigorita MG, Rakowitz D, Steindl T, Langer T. Evaluation of in vitro aldose redutase inhibitory activity of 5-arylidene-2,4-thiazolidinediones. Bioorg Med Chem Lett 2007; 17:3886-93. [PMID: 17512196 DOI: 10.1016/j.bmcl.2007.04.109] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2007] [Revised: 04/30/2007] [Accepted: 04/30/2007] [Indexed: 12/14/2022]
Abstract
A number of 5-arylidene-2,4-thiazolidinediones containing a hydroxy or a carboxymethoxy group in their 5-benzylidene moiety have been synthesised and evaluated as in vitro aldose reductase (ALR2) inhibitors. Most of them exhibited strong inhibitory activity, with IC(50) values in the range between 0.20 and 0.70 microM. Molecular docking simulations into the ALR2 active site highlighted that the phenolic or carboxylic substituents of the 5-benzylidene moiety can favourably interact, in alternative poses, either with amino acid residues lining the lipophilic pocket of the enzyme, such as Leu300, or with the positively charged recognition region of the ALR2 active site.
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Affiliation(s)
- Rosanna Maccari
- Dipartimento Farmaco-chimico, Facoltà di Farmacia, Università di Messina, Viale SS. Annunziata, 98168 Messina, Italy.
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