1sg0

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[[Image:1sg0.gif|left|200px]]
 
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==Crystal structure analysis of QR2 in complex with resveratrol==
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The line below this paragraph, containing "STRUCTURE_1sg0", creates the "Structure Box" on the page.
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<StructureSection load='1sg0' size='340' side='right'caption='[[1sg0]], [[Resolution|resolution]] 1.50&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[1sg0]] is a 2 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=1SG0 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1SG0 FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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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]] 1.5&#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=FAD:FLAVIN-ADENINE+DINUCLEOTIDE'>FAD</scene>, <scene name='pdbligand=STL:RESVERATROL'>STL</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
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{{STRUCTURE_1sg0| PDB=1sg0 | SCENE= }}
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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=1sg0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1sg0 OCA], [https://pdbe.org/1sg0 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1sg0 RCSB], [https://www.ebi.ac.uk/pdbsum/1sg0 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1sg0 ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/NQO2_HUMAN NQO2_HUMAN] The enzyme apparently serves as a quinone reductase in connection with conjugation reactions of hydroquinones involved in detoxification pathways as well as in biosynthetic processes such as the vitamin K-dependent gamma-carboxylation of glutamate residues in prothrombin synthesis.<ref>PMID:18254726</ref>
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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/sg/1sg0_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=1sg0 ConSurf].
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<div style="clear:both"></div>
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'''Crystal structure analysis of QR2 in complex with resveratrol'''
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==See Also==
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*[[Quinone reductase 3D structures|Quinone reductase 3D structures]]
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== References ==
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==Overview==
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<references/>
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Resveratrol has been shown to have chemopreventive, cardioprotective, and antiaging properties. Here, we report that resveratrol is a potent inhibitor of quinone reductase 2 (QR2) activity in vitro with a dissociation constant of 35 nM and show that it specifically binds to the deep active-site cleft of QR2 using high-resolution structural analysis. All three resveratrol hydroxyl groups form hydrogen bonds with amino acids from QR2, anchoring a flat resveratrol molecule in parallel with the isoalloxazine ring of FAD. The unique active-site pocket in QR2 could potentially bind other natural polyphenols such as flavonoids, as proven by the high affinity exhibited by quercetin toward QR2. K562 cells with QR2 expression suppressed by RNAi showed similar properties as resveratrol-treated cells in their resistance to quinone toxicity. Furthermore, the QR2 knockdown K562 cells exhibit increased antioxidant and detoxification enzyme expression and reduced proliferation rates. These observations could imply that the chemopreventive and cardioprotective properties of resveratrol are possibly the results of QR2 activity inhibition, which in turn, up-regulates the expression of cellular antioxidant enzymes and cellular resistance to oxidative stress.
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__TOC__
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</StructureSection>
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==About this Structure==
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1SG0 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1SG0 OCA].
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==Reference==
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Crystal structure of quinone reductase 2 in complex with resveratrol., Buryanovskyy L, Fu Y, Boyd M, Ma Y, Hsieh TC, Wu JM, Zhang Z, Biochemistry. 2004 Sep 14;43(36):11417-26. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15350128 15350128]
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[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: Boyd, M.]]
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[[Category: Boyd M]]
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[[Category: Buryanovskyy, L.]]
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[[Category: Buryanovskyy L]]
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[[Category: Fu, Y.]]
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[[Category: Fu Y]]
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[[Category: Ma, Y.]]
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[[Category: Ma Y]]
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[[Category: Tsieh, T C.]]
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[[Category: Tsieh TC]]
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[[Category: Wu, J M.]]
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[[Category: Wu JM]]
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[[Category: Zhang, Z.]]
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[[Category: Zhang Z]]
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[[Category: Quinone reductase 2]]
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[[Category: Resveratrol]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 08:39:18 2008''
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Current revision

Crystal structure analysis of QR2 in complex with resveratrol

PDB ID 1sg0

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