3f4x: Difference between revisions
New page: '''Unreleased structure''' The entry 3f4x is ON HOLD Authors: Temperini, C., Cecchi, A., Scozzafava, A., Supuran, C.T. Description: Carbonic anhydrase inhibitors. Comparison of chlorth... |
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The | ==Carbonic anhydrase inhibitors. Comparison of chlorthalidone and indapamide X-ray crystal structures in adducts with isozyme II: when three water molecules make the difference== | ||
<StructureSection load='3f4x' size='340' side='right'caption='[[3f4x]], [[Resolution|resolution]] 1.90Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[3f4x]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3F4X OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3F4X FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.9Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=HG:MERCURY+(II)+ION'>HG</scene>, <scene name='pdbligand=KLT:2-CHLORO-5-[(1S)-1-HYDROXY-3-OXO-2H-ISOINDOL-1-YL]BENZENESULFONAMIDE'>KLT</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3f4x FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3f4x OCA], [https://pdbe.org/3f4x PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3f4x RCSB], [https://www.ebi.ac.uk/pdbsum/3f4x PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3f4x ProSAT]</span></td></tr> | |||
</table> | |||
== Disease == | |||
[https://www.uniprot.org/uniprot/CAH2_HUMAN CAH2_HUMAN] Defects in CA2 are the cause of osteopetrosis autosomal recessive type 3 (OPTB3) [MIM:[https://omim.org/entry/259730 259730]; also known as osteopetrosis with renal tubular acidosis, carbonic anhydrase II deficiency syndrome, Guibaud-Vainsel syndrome or marble brain disease. Osteopetrosis is a rare genetic disease characterized by abnormally dense bone, due to defective resorption of immature bone. The disorder occurs in two forms: a severe autosomal recessive form occurring in utero, infancy, or childhood, and a benign autosomal dominant form occurring in adolescence or adulthood. Autosomal recessive osteopetrosis is usually associated with normal or elevated amount of non-functional osteoclasts. OPTB3 is associated with renal tubular acidosis, cerebral calcification (marble brain disease) and in some cases with mental retardation.<ref>PMID:1928091</ref> <ref>PMID:1542674</ref> <ref>PMID:8834238</ref> <ref>PMID:9143915</ref> <ref>PMID:15300855</ref> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/CAH2_HUMAN CAH2_HUMAN] Essential for bone resorption and osteoclast differentiation (By similarity). Reversible hydration of carbon dioxide. Can hydrate cyanamide to urea. Involved in the regulation of fluid secretion into the anterior chamber of the eye.<ref>PMID:10550681</ref> <ref>PMID:11831900</ref> | |||
== Evolutionary Conservation == | |||
[[Image:Consurf_key_small.gif|200px|right]] | |||
Check<jmol> | |||
<jmolCheckbox> | |||
<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/f4/3f4x_consurf.spt"</scriptWhenChecked> | |||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | |||
<text>to colour the structure by Evolutionary Conservation</text> | |||
</jmolCheckbox> | |||
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=3f4x ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Thiazide diuretics inhibit all mammalian isoforms of carbonic anhydrase (CA, EC 4.2.1.1) with a different profile as compared to classical inhibitors. Acting as moderate-weak inhibitors of CA II and CA I, chlorthalidone and indapamide considerably inhibit other isozymes among the 16 CAs present in vertebrates. These compounds show a different behavior against CAs I and II, with chlorthalidone being 18.3 times more potent against CA II and 150 times more potent against CA I, as compared to indapamide. In the X-ray crystal structures of the CA II-chlorthalidone adduct three active site water molecules interacting with the inhibitor scaffold were observed that lack in the corresponding indapamide adduct. Chlorthalidone bound within the active site is in an enolic tautomeric form, with the OH moiety participating in two strong hydrogen bonds with Asn67 and a water molecule. This binding mode may be exploited for designing better CA II inhibitors. | |||
Carbonic anhydrase inhibitors. Comparison of chlorthalidone and indapamide X-ray crystal structures in adducts with isozyme II: when three water molecules and the keto-enol tautomerism make the difference.,Temperini C, Cecchi A, Scozzafava A, Supuran CT J Med Chem. 2009 Jan 22;52(2):322-8. PMID:19115843<ref>PMID:19115843</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 3f4x" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Carbonic anhydrase 3D structures|Carbonic anhydrase 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Homo sapiens]] | |||
[[Category: Large Structures]] | |||
[[Category: Cecchi A]] | |||
[[Category: Scozzafava A]] | |||
[[Category: Supuran CT]] | |||
[[Category: Temperini C]] | |||