9R8Y
Three dimensional structure of human carbonic anhydrase IX in complex with sulfonamide
This is a non-PDB format compatible entry.
Summary for 9R8Y
| Entry DOI | 10.2210/pdb9r8y/pdb |
| Descriptor | Carbonic anhydrase 9, ZINC ION, ~{N}-butyl-4-cyclohexylsulfanyl-3-sulfamoyl-benzamide, ... (4 entities in total) |
| Functional Keywords | ca ix, ca 9, carbonic anhydrase ix, carbonic anhydrase 9, lyase |
| Biological source | Homo sapiens (human) |
| Total number of polymer chains | 4 |
| Total formula weight | 114102.15 |
| Authors | |
| Primary citation | Zaksauskas, A.,Paketuryte-Latve, V.,Jankunaite, A.,Capkauskaite, E.,Becart, Y.,Smirnov, A.,Pospisilova, K.,Leitans, J.,Brynda, J.,Kazaks, A.,Baranauskiene, L.,Manakova, E.,Grazulis, S.,Kairys, V.,Tars, K.,Rezacova, P.,Matulis, D. Affinity and Selectivity of Protein-Ligand Recognition: A Minor Chemical Modification Changes Carbonic Anhydrase Binding Profile. J.Med.Chem., 68:17752-17773, 2025 Cited by PubMed Abstract: Discovery of small-molecule drugs relies on their strong binding affinity compared to nontarget proteins, thus possessing selectivity. Minor chemical structure changes usually exhibit little change in the compound efficacy, with rare exceptions. We developed a series of nearly 50 -substituted benzenesulfonamides and experimentally measured their interactions with the 12 catalytically active human carbonic anhydrase (CA) isozymes. Inhibitors were designed using seven different substituent groups, including 4--substituted 3-sulfamoyl benzoates and benzamides, 4--substituted 3-sulfamoyl benzoates and benzamides, 4--substituted 3-sulfamoyl benzoates and benzamides, and 4-amino-substituted benzamides. The oxidation state of sulfur at the position significantly influenced the compound's affinity for CAIX, a target for anticancer drugs, demonstrating affinities hundreds of thousands of times stronger than related compounds. Coupled with X-ray crystal structures and molecular docking, the relationship between structure and thermodynamics offers insights into how small changes in the structure lead to significant changes in affinity for drug design. PubMed: 40801814DOI: 10.1021/acs.jmedchem.5c01421 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (1.95 Å) |
Structure validation
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