2uwa

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[[Image:2uwa.gif|left|200px]]<br /><applet load="2uwa" size="350" color="white" frame="true" align="right" spinBox="true"
 
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caption="2uwa, resolution 1.80&Aring;" />
 
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'''CRYSTAL STRUCTURE OF THE NASTURTIUM SEEDLING XYLOGLUCANASE ISOFORM NXG1'''<br />
 
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==Overview==
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==Crystal structure of the Nasturtium seedling xyloglucanase isoform NXG1==
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High-resolution, three-dimensional structures of the archetypal glycoside, hydrolase family 16 (GH16) endo-xyloglucanases Tm-NXG1 and Tm-NXG2 from, nasturtium (Tropaeolum majus) have been solved by x-ray crystallography., Key structural features that modulate the relative rates of substrate, hydrolysis to transglycosylation in the GH16 xyloglucan-active enzymes, were identified by structure-function studies of the recombinantly, expressed enzymes in comparison with data for the strict xyloglucan, endo-transglycosylase Ptt-XET16-34 from hybrid aspen (Populus tremula x, Populus tremuloides). Production of the loop deletion variant, Tm-NXG1-DeltaYNIIG yielded an enzyme that was structurally similar to, Ptt-XET16-34 and had a greatly increased transglycosylation:hydrolysis, ratio. Comprehensive bioinformatic analyses of XTH gene products, together, with detailed kinetic data, strongly suggest that xyloglucanase activity, has evolved as a gain of function in an ancestral GH16 XET to meet, specific biological requirements during seed germination, fruit ripening, and rapid wall expansion.
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<StructureSection load='2uwa' size='340' side='right'caption='[[2uwa]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[2uwa]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Tropaeolum_majus Tropaeolum majus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2UWA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2UWA 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]] 1.8&#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=GOL:GLYCEROL'>GOL</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=2uwa FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2uwa OCA], [https://pdbe.org/2uwa PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2uwa RCSB], [https://www.ebi.ac.uk/pdbsum/2uwa PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2uwa ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/Q07524_TROMA Q07524_TROMA] Catalyzes xyloglucan endohydrolysis (XEH) and/or endotransglycosylation (XET). Cleaves and religates xyloglucan polymers, an essential constituent of the primary cell wall, and thereby participates in cell wall construction of growing tissues.[RuleBase:RU361120]
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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/uw/2uwa_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.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=2uwa 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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High-resolution, three-dimensional structures of the archetypal glycoside hydrolase family 16 (GH16) endo-xyloglucanases Tm-NXG1 and Tm-NXG2 from nasturtium (Tropaeolum majus) have been solved by x-ray crystallography. Key structural features that modulate the relative rates of substrate hydrolysis to transglycosylation in the GH16 xyloglucan-active enzymes were identified by structure-function studies of the recombinantly expressed enzymes in comparison with data for the strict xyloglucan endo-transglycosylase Ptt-XET16-34 from hybrid aspen (Populus tremula x Populus tremuloides). Production of the loop deletion variant Tm-NXG1-DeltaYNIIG yielded an enzyme that was structurally similar to Ptt-XET16-34 and had a greatly increased transglycosylation:hydrolysis ratio. Comprehensive bioinformatic analyses of XTH gene products, together with detailed kinetic data, strongly suggest that xyloglucanase activity has evolved as a gain of function in an ancestral GH16 XET to meet specific biological requirements during seed germination, fruit ripening, and rapid wall expansion.
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==About this Structure==
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Structural evidence for the evolution of xyloglucanase activity from xyloglucan endo-transglycosylases: biological implications for cell wall metabolism.,Baumann MJ, Eklof JM, Michel G, Kallas AM, Teeri TT, Czjzek M, Brumer H 3rd Plant Cell. 2007 Jun;19(6):1947-63. Epub 2007 Jun 8. PMID:17557806<ref>PMID:17557806</ref>
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2UWA is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Tropaeolum_majus Tropaeolum majus] with <scene name='pdbligand=GOL:'>GOL</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Known structural/functional Site: <scene name='pdbsite=AC1:Gol Binding Site For Chain C'>AC1</scene>. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2UWA 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 Evidence for the Evolution of Xyloglucanase Activity from Xyloglucan Endo-Transglycosylases: Biological Implications for Cell Wall Metabolism., Baumann MJ, Eklof JM, Michel G, Kallas AM, Teeri TT, Czjzek M, Brumer H 3rd, Plant Cell. 2007 Jun 8;. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=17557806 17557806]
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</div>
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[[Category: Single protein]]
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<div class="pdbe-citations 2uwa" style="background-color:#fffaf0;"></div>
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[[Category: Tropaeolum majus]]
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[[Category: Baumann, M.J.]]
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[[Category: Brumer, H.]]
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[[Category: Czjzek, M.]]
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[[Category: Eklof, J.]]
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[[Category: Kallasa, A.]]
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[[Category: Michel, G.]]
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[[Category: Teeri, T.T.]]
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[[Category: GOL]]
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[[Category: family gh16]]
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[[Category: glycosidase]]
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[[Category: glycoside hydrolase]]
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[[Category: hydrolase]]
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[[Category: tropaeolum majus xyloglucanase]]
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[[Category: xyloglucan-endo-transferase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Jan 23 14:09:01 2008''
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==See Also==
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*[[Glucanase 3D structures|Glucanase 3D structures]]
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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: Large Structures]]
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[[Category: Tropaeolum majus]]
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[[Category: Baumann MJ]]
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[[Category: Brumer H]]
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[[Category: Czjzek M]]
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[[Category: Eklof J]]
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[[Category: Kallasa A]]
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[[Category: Michel G]]
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[[Category: Teeri TT]]

Current revision

Crystal structure of the Nasturtium seedling xyloglucanase isoform NXG1

PDB ID 2uwa

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