1wu5

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(New page: 200px<br /><applet load="1wu5" size="450" color="white" frame="true" align="right" spinBox="true" caption="1wu5, resolution 2.20&Aring;" /> '''Crystal structure of...)
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[[Image:1wu5.gif|left|200px]]<br /><applet load="1wu5" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1wu5, resolution 2.20&Aring;" />
 
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'''Crystal structure of reducing-end-xylose releasing exo-oligoxylanase complexed with xylose'''<br />
 
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==Overview==
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==Crystal structure of reducing-end-xylose releasing exo-oligoxylanase complexed with xylose==
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Reducing end xylose-releasing exo-oligoxylanase from Bacillus halodurans, C-125 (Rex) hydrolyzes xylooligosaccharides whose degree of polymerization, is greater than or equal to 3, releasing the xylose unit at the reducing, end. It is a unique exo-type glycoside hydrolase that recognizes the, xylose unit at the reducing end in a very strict manner, even, discriminating the beta-anomeric hydroxyl configuration from the, alpha-anomer or 1-deoxyxylose. We have determined the crystal structures, of Rex in unliganded and complex forms at 1.35-2.20-A resolution and, revealed the structural aspects of its three subsites ranging from -2 to, +1. The structure of Rex was compared with those of endo-type enzymes in, glycoside hydrolase subfamily 8a (GH-8a). The catalytic machinery of Rex, is basically conserved with other GH-8a enzymes. However, subsite +2 is, blocked by a barrier formed by a kink in the loop before helix alpha10., His-319 in this loop forms a direct hydrogen bond with the beta-hydroxyl, of xylose at subsite +1, contributing to the specific recognition of, anomers at the reducing end.
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<StructureSection load='1wu5' size='340' side='right'caption='[[1wu5]], [[Resolution|resolution]] 2.20&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1wu5]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Alkalihalobacillus_halodurans_C-125 Alkalihalobacillus halodurans C-125]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1WU5 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1WU5 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]] 2.2&#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=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=NI:NICKEL+(II)+ION'>NI</scene>, <scene name='pdbligand=XYP:BETA-D-XYLOPYRANOSE'>XYP</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=1wu5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1wu5 OCA], [https://pdbe.org/1wu5 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1wu5 RCSB], [https://www.ebi.ac.uk/pdbsum/1wu5 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1wu5 ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/REOX_HALH5 REOX_HALH5] Hydrolyzes xylooligosaccharides with a degree of polymerization of greater than or equal to 3, releasing xylose from the reducing end. Only hydrolyzes the beta anomers of xylooligosaccharides, with inversion of anomeric configuration. Hydrolyzes the glucose and xylose-based trisaccharides where xylose is located at the -1 subsite, GXX, XXG and GXG. Does not hydrolyze xylan, chitosan, lichenan, curdlan or carboxymethylcellulose.<ref>PMID:15491996</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/wu/1wu5_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=1wu5 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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Reducing end xylose-releasing exo-oligoxylanase from Bacillus halodurans C-125 (Rex) hydrolyzes xylooligosaccharides whose degree of polymerization is greater than or equal to 3, releasing the xylose unit at the reducing end. It is a unique exo-type glycoside hydrolase that recognizes the xylose unit at the reducing end in a very strict manner, even discriminating the beta-anomeric hydroxyl configuration from the alpha-anomer or 1-deoxyxylose. We have determined the crystal structures of Rex in unliganded and complex forms at 1.35-2.20-A resolution and revealed the structural aspects of its three subsites ranging from -2 to +1. The structure of Rex was compared with those of endo-type enzymes in glycoside hydrolase subfamily 8a (GH-8a). The catalytic machinery of Rex is basically conserved with other GH-8a enzymes. However, subsite +2 is blocked by a barrier formed by a kink in the loop before helix alpha10. His-319 in this loop forms a direct hydrogen bond with the beta-hydroxyl of xylose at subsite +1, contributing to the specific recognition of anomers at the reducing end.
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==About this Structure==
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Structural basis for the specificity of the reducing end xylose-releasing exo-oligoxylanase from Bacillus halodurans C-125.,Fushinobu S, Hidaka M, Honda Y, Wakagi T, Shoun H, Kitaoka M J Biol Chem. 2005 Apr 29;280(17):17180-6. Epub 2005 Feb 17. PMID:15718242<ref>PMID:15718242</ref>
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1WU5 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Bacteria Bacteria] with XYP, NI and GOL as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Oligosaccharide_reducing-end_xylanase Oligosaccharide reducing-end xylanase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.156 3.2.1.156] Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1WU5 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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Structural basis for the specificity of the reducing end xylose-releasing exo-oligoxylanase from Bacillus halodurans C-125., Fushinobu S, Hidaka M, Honda Y, Wakagi T, Shoun H, Kitaoka M, J Biol Chem. 2005 Apr 29;280(17):17180-6. Epub 2005 Feb 17. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=15718242 15718242]
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</div>
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[[Category: Bacteria]]
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<div class="pdbe-citations 1wu5" style="background-color:#fffaf0;"></div>
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[[Category: Oligosaccharide reducing-end xylanase]]
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== References ==
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[[Category: Single protein]]
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<references/>
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[[Category: Fushinobu, S.]]
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__TOC__
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[[Category: Hidaka, M.]]
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</StructureSection>
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[[Category: Honda, Y.]]
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[[Category: Alkalihalobacillus halodurans C-125]]
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[[Category: Kitaoka, M.]]
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[[Category: Large Structures]]
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[[Category: Shoun, H.]]
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[[Category: Fushinobu S]]
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[[Category: Wakagi, T.]]
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[[Category: Hidaka M]]
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[[Category: GOL]]
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[[Category: Honda Y]]
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[[Category: NI]]
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[[Category: Kitaoka M]]
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[[Category: XYP]]
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[[Category: Shoun H]]
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[[Category: (alpla/alpha)6 barrel]]
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[[Category: Wakagi T]]
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[[Category: glycoside hydrolase family 8]]
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Sun Nov 25 00:44:00 2007''
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Current revision

Crystal structure of reducing-end-xylose releasing exo-oligoxylanase complexed with xylose

PDB ID 1wu5

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