5llo | pdb_00005llo

Crystal structure of human carbonic anhydrase isozyme XII with 3-[(1S)-2,3-Dihydro-1H-inden-1-ylamino]-2,5,6-trifluoro-4-[(2-hy-droxyethyl)sulfonyl]benzenesulfonamide

spinqualitylabelsall models 5llo, resolution 1.60Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5llo is a 4 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.6Å Ligands: 5EF, EDO, ZN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Disease CAH12_HUMAN Defects in CA12 are the cause of hyperchlorhidrosis isolated (HCHLH) [MIM:143860. HCHLH is a disorder characterized by excessive sweating and increased sweat chloride levels. Affected individuals suffer from episodes of hyponatremic dehydration and report increased amounts of visible salt precipitates in sweat. Function CAH12_HUMAN Reversible hydration of carbon dioxide. Publication Abstract from PubMed The structure-thermodynamics correlation analysis was performed for a series of fluorine- and chlorine-substituted benzenesulfonamide inhibitors binding to several human carbonic anhydrase (CA) isoforms. The total of 24 crystal structures of 16 inhibitors bound to isoforms CA I, CA II, CA XII, and CA XIII provided the structural information of selective recognition between a compound and CA isoform. The binding thermodynamics of all structures was determined by the analysis of binding-linked protonation events, yielding the intrinsic parameters, i.e., the enthalpy, entropy, and Gibbs energy of binding. Inhibitor binding was compared within structurally similar pairs that differ by para- or meta-substituents enabling to obtain the contributing energies of ligand fragments. The pairs were divided into two groups. First, similar binders-the pairs that keep the same orientation of the benzene ring exhibited classical hydrophobic effect, a less exothermic enthalpy and a more favorable entropy upon addition of the hydrophobic fragments. Second, dissimilar binders-the pairs of binders that demonstrated altered positions of the benzene rings exhibited the non-classical hydrophobic effect, a more favorable enthalpy and variable entropy contribution. A deeper understanding of the energies contributing to the protein-ligand recognition should lead toward the eventual goal of rational drug design where chemical structures of ligands could be designed based on the target protein structure. Crystal structure correlations with the intrinsic thermodynamics of human carbonic anhydrase inhibitor binding.,Smirnov A, Zubriene A, Manakova E, Grazulis S, Matulis D PeerJ. 2018 Feb 26;6:e4412. doi: 10.7717/peerj.4412. eCollection 2018. PMID:29503769 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Carbonic anhydrase 3D structures

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