View source for 1dqa

==COMPLEX OF THE CATALYTIC PORTION OF HUMAN HMG-COA REDUCTASE WITH HMG, COA, AND NADP+==
<StructureSection load='1dqa' size='340' side='right' caption='[[1dqa]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1dqa]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DQA OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1DQA FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=COA:COENZYME+A'>COA</scene>, <scene name='pdbligand=MAH:3-HYDROXY-3-METHYL-GLUTARIC+ACID'>MAH</scene>, <scene name='pdbligand=NAP:NADP+NICOTINAMIDE-ADENINE-DINUCLEOTIDE+PHOSPHATE'>NAP</scene></td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Hydroxymethylglutaryl-CoA_reductase_(NADPH) Hydroxymethylglutaryl-CoA reductase (NADPH)], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.1.1.34 1.1.1.34] </span></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1dqa FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1dqa OCA], [http://pdbe.org/1dqa PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1dqa RCSB], [http://www.ebi.ac.uk/pdbsum/1dqa PDBsum]</span></td></tr>
</table>
== Function ==
[[http://www.uniprot.org/uniprot/HMDH_HUMAN HMDH_HUMAN]] Transmembrane glycoprotein that is the rate-limiting enzyme in cholesterol biosynthesis as well as in the biosynthesis of nonsterol isoprenoids that are essential for normal cell function including ubiquinone and geranylgeranyl proteins. 
== 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/dq/1dqa_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/chain_selection.php?pdb_ID=2ata ConSurf].
<div style="clear:both"></div>
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== Publication Abstract from PubMed ==
3-hydroxy-3-methylglutaryl-CoA reductase (HMGR) catalyzes the formation of mevalonate, the committed step in the biosynthesis of sterols and isoprenoids. The activity of HMGR is controlled through synthesis, degradation and phosphorylation to maintain the concentration of mevalonate-derived products. In addition to the physiological regulation of HMGR, the human enzyme has been targeted successfully by drugs in the clinical treatment of high serum cholesterol levels. Three crystal structures of the catalytic portion of human HMGR in complexes with HMG-CoA, with HMG and CoA, and with HMG, CoA and NADP(+), provide a detailed view of the enzyme active site. Catalytic portions of human HMGR form tight tetramers. The crystal structure explains the influence of the enzyme's oligomeric state on the activity and suggests a mechanism for cholesterol sensing. The active site architecture of human HMGR is different from that of bacterial HMGR; this may explain why binding of HMGR inhibitors to bacterial HMGRs has not been reported.

Crystal structure of the catalytic portion of human HMG-CoA reductase: insights into regulation of activity and catalysis.,Istvan ES, Palnitkar M, Buchanan SK, Deisenhofer J EMBO J. 2000 Mar 1;19(5):819-30. PMID:10698924<ref>PMID:10698924</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 1dqa" style="background-color:#fffaf0;"></div>

==See Also==
*[[HMG-CoA Reductase|HMG-CoA Reductase]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Human]]
[[Category: Buchanan, S K]]
[[Category: Deisenhofer, J]]
[[Category: Istvan, E S]]
[[Category: Palnitkar, M]]
[[Category: Cholesterol biosynthesis]]
[[Category: Hmg-coa]]
[[Category: Nadph]]
[[Category: Oxidoreductase]]