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1wnt

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{{Seed}}
 
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[[Image:1wnt.png|left|200px]]
 
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==Structure of the tetrameric form of Human L-Xylulose Reductase==
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The line below this paragraph, containing "STRUCTURE_1wnt", creates the "Structure Box" on the page.
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<StructureSection load='1wnt' size='340' side='right'caption='[[1wnt]], [[Resolution|resolution]] 2.30&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'>[[1wnt]] is a 4 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=1WNT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1WNT 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]] 2.3&#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=NAP:NADP+NICOTINAMIDE-ADENINE-DINUCLEOTIDE+PHOSPHATE'>NAP</scene></td></tr>
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{{STRUCTURE_1wnt| PDB=1wnt | 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=1wnt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1wnt OCA], [https://pdbe.org/1wnt PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1wnt RCSB], [https://www.ebi.ac.uk/pdbsum/1wnt PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1wnt ProSAT]</span></td></tr>
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</table>
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== Disease ==
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[https://www.uniprot.org/uniprot/DCXR_HUMAN DCXR_HUMAN] Note=The enzyme defect in pentosuria has been shown to involve L-xylulose reductase. Essential pentosuria is an inborn error of metabolism characterized by the excessive urinary excretion of the pentose L-xylulose.
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== Function ==
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[https://www.uniprot.org/uniprot/DCXR_HUMAN DCXR_HUMAN] Catalyzes the NADPH-dependent reduction of several pentoses, tetroses, trioses, alpha-dicarbonyl compounds and L-xylulose. Participates in the uronate cycle of glucose metabolism. May play a role in the water absorption and cellular osmoregulation in the proximal renal tubules by producing xylitol, an osmolyte, thereby preventing osmolytic stress from occurring in the renal tubules.
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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/wn/1wnt_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=1wnt 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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L-Xylulose reductase (XR) is a member of the short-chain dehydrogenase/reductase (SDR) superfamily. In this study we report the structure of the biological tetramer of human XR in complex with NADP(+) and a competitive inhibitor solved at 2.3 A resolution. A single subunit of human XR is formed by a centrally positioned, seven-stranded, parallel beta-sheet surrounded on either side by two arrays of three alpha-helices. Two helices located away from the main body of the protein form the variable substrate-binding cleft, while the dinucleotide coenzyme-binding motif is formed by a classical Rossmann fold. The tetrameric structure of XR, which is held together via salt bridges formed by the guanidino group of Arg203 from one monomer and the carboxylate group of the C-terminal residue Cys244 from the neighboring monomer, explains the ability of human XR to prevent the cold inactivation seen in the rodent forms of the enzyme. The orientations of Arg203 and Cys244 are maintained by a network of hydrogen bonds and main-chain interactions of Gln137, Glu238, Phe241, and Trp242. These interactions are similar to those defining the quaternary structure of the closely related carbonyl reductase from mouse lung. Molecular modeling and site-directed mutagenesis identified the active site residues His146 and Trp191 as forming essential contacts with inhibitors of XR. These results could provide a structural basis in the design of potent and specific inhibitors for human XR.
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===Strucutre of the tetrameric form of Human L-Xylulose Reductase===
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Structure of the tetrameric form of human L-Xylulose reductase: probing the inhibitor-binding site with molecular modeling and site-directed mutagenesis.,El-Kabbani O, Carbone V, Darmanin C, Ishikura S, Hara A Proteins. 2005 Aug 15;60(3):424-32. PMID:15906319<ref>PMID:15906319</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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The line below this paragraph, {{ABSTRACT_PUBMED_15906319}}, adds the Publication Abstract to the page
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<div class="pdbe-citations 1wnt" style="background-color:#fffaf0;"></div>
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(as it appears on PubMed at http://www.pubmed.gov), where 15906319 is the PubMed ID number.
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== References ==
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-->
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<references/>
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{{ABSTRACT_PUBMED_15906319}}
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__TOC__
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</StructureSection>
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==About this Structure==
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1WNT 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=1WNT OCA].
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==Reference==
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Structure of the tetrameric form of human L-Xylulose reductase: probing the inhibitor-binding site with molecular modeling and site-directed mutagenesis., El-Kabbani O, Carbone V, Darmanin C, Ishikura S, Hara A, Proteins. 2005 Aug 15;60(3):424-32. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15906319 15906319]
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[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
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[[Category: L-xylulose reductase]]
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[[Category: Large Structures]]
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[[Category: Single protein]]
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[[Category: Carbone V]]
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[[Category: Carbone, V.]]
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[[Category: Darmanin C]]
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[[Category: Darmanin, C.]]
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[[Category: El-Kabbani O]]
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[[Category: El-Kabbani, O.]]
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[[Category: Hara A]]
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[[Category: Hara, A.]]
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[[Category: Ishikura S]]
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[[Category: Ishikura, S.]]
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[[Category: 6 alpha helice]]
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[[Category: 7 stranded parallel beta sheet]]
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[[Category: Dinucleotide co-enzyme binding motif]]
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[[Category: Rossmann fold]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat Jul 5 16:21:12 2008''
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Current revision

Structure of the tetrameric form of Human L-Xylulose Reductase

PDB ID 1wnt

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