1o6h

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[[Image:1o6h.gif|left|200px]]<br /><applet load="1o6h" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1o6h, resolution 2.8&Aring;" />
 
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'''SQUALENE-HOPENE CYCLASE'''<br />
 
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==Overview==
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==Squalene-Hopene Cyclase==
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The binding structures of 11 human oxidosqualene cyclase inhibitors, designed as cholesterol-lowering agents were determined for the, squalene-hopene cyclase from Alicyclobacillus acidocaldarius, which is the, only structurally known homologue of the human enzyme. The complexes were, produced by cocrystallization, and the structures were elucidated by X-ray, diffraction analyses. All inhibitors were bound in the large active center, cavity. The detailed binding structures are presented and discussed in the, light of the IC50 values of these 11 as well as 17 other inhibitors. They, provide a consistent picture for the inhibition of the bacterial enzyme, and can be used to adjust and improve homology models of the human enzyme., The detailed active center structures of the two enzymes are too different, to show an IC50 correlation.
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<StructureSection load='1o6h' size='340' side='right'caption='[[1o6h]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1o6h]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Alicyclobacillus_acidocaldarius Alicyclobacillus acidocaldarius]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1O6H OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1O6H FirstGlance]. <br>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.8&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=C8E:(HYDROXYETHYLOXY)TRI(ETHYLOXY)OCTANE'>C8E</scene>, <scene name='pdbligand=W37:N-(6-{[1-(4-BROMOPHENYL)ISOQUINOLIN-6-YL]OXY}HEXYL)-N-METHYLPROP-2-EN-1-AMINE'>W37</scene></td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1o6h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1o6h OCA], [https://pdbe.org/1o6h PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1o6h RCSB], [https://www.ebi.ac.uk/pdbsum/1o6h PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1o6h ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/SQHC_ALIAD SQHC_ALIAD] Catalyzes the cyclization of squalene into hopene.
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/o6/1o6h_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</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=1o6h ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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The binding structures of 11 human oxidosqualene cyclase inhibitors designed as cholesterol-lowering agents were determined for the squalene-hopene cyclase from Alicyclobacillus acidocaldarius, which is the only structurally known homologue of the human enzyme. The complexes were produced by cocrystallization, and the structures were elucidated by X-ray diffraction analyses. All inhibitors were bound in the large active center cavity. The detailed binding structures are presented and discussed in the light of the IC50 values of these 11 as well as 17 other inhibitors. They provide a consistent picture for the inhibition of the bacterial enzyme and can be used to adjust and improve homology models of the human enzyme. The detailed active center structures of the two enzymes are too different to show an IC50 correlation.
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==About this Structure==
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Binding structures and potencies of oxidosqualene cyclase inhibitors with the homologous squalene-hopene cyclase.,Lenhart A, Reinert DJ, Aebi JD, Dehmlow H, Morand OH, Schulz GE J Med Chem. 2003 May 22;46(11):2083-92. PMID:12747780<ref>PMID:12747780</ref>
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1O6H is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Alicyclobacillus_acidocaldarius Alicyclobacillus acidocaldarius] with C8E and W37 as [http://en.wikipedia.org/wiki/ligands ligands]. Known structural/functional Site: <scene name='pdbsite=AC1:W37 Binding Site For Chain C'>AC1</scene>. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1O6H OCA].
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==Reference==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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Binding structures and potencies of oxidosqualene cyclase inhibitors with the homologous squalene-hopene cyclase., Lenhart A, Reinert DJ, Aebi JD, Dehmlow H, Morand OH, Schulz GE, J Med Chem. 2003 May 22;46(11):2083-92. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=12747780 12747780]
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</div>
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[[Category: Alicyclobacillus acidocaldarius]]
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<div class="pdbe-citations 1o6h" style="background-color:#fffaf0;"></div>
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[[Category: Single protein]]
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[[Category: Aebi, J.D.]]
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[[Category: Dehmlow, H.]]
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[[Category: Lenhart, A.]]
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[[Category: Morand, O.H.]]
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[[Category: Reinert, D.J.]]
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[[Category: Schulz, G.E.]]
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[[Category: Weihofen, W.A.]]
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[[Category: C8E]]
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[[Category: W37]]
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[[Category: cholesterol biosynthesis]]
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[[Category: inhibitor]]
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[[Category: interactions]]
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[[Category: isomerase]]
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[[Category: monotopic membrane protein]]
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[[Category: oxidosqualene cyclase]]
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Dec 18 16:50:34 2007''
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==See Also==
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*[[Squalene-hopene cyclase|Squalene-hopene cyclase]]
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== References ==
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<references/>
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__TOC__
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</StructureSection>
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[[Category: Alicyclobacillus acidocaldarius]]
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[[Category: Large Structures]]
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[[Category: Aebi JD]]
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[[Category: Dehmlow H]]
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[[Category: Lenhart A]]
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[[Category: Morand OH]]
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[[Category: Reinert DJ]]
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[[Category: Schulz GE]]
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[[Category: Weihofen WA]]

Current revision

Squalene-Hopene Cyclase

PDB ID 1o6h

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