3w6b

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==Crystal structure of catalytic domain of chitinase from Ralstonia sp. A-471==
==Crystal structure of catalytic domain of chitinase from Ralstonia sp. A-471==
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<StructureSection load='3w6b' size='340' side='right' caption='[[3w6b]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
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<StructureSection load='3w6b' size='340' side='right'caption='[[3w6b]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>[[3w6b]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Ralstonia_sp._a-471 Ralstonia sp. a-471]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3W6B OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3W6B FirstGlance]. <br>
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<table><tr><td colspan='2'>[[3w6b]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Ralstonia_sp._A-471 Ralstonia sp. A-471]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3W6B OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3W6B FirstGlance]. <br>
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene></td></tr>
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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]] 1.9&#8491;</td></tr>
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<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3w6c|3w6c]], [[3w6d|3w6d]], [[3w6e|3w6e]], [[3w6f|3w6f]]</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='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Chitinase Chitinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.14 3.2.1.14] </span></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=3w6b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3w6b OCA], [https://pdbe.org/3w6b PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3w6b RCSB], [https://www.ebi.ac.uk/pdbsum/3w6b PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3w6b ProSAT]</span></td></tr>
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<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=3w6b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3w6b OCA], [http://pdbe.org/3w6b PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3w6b RCSB], [http://www.ebi.ac.uk/pdbsum/3w6b PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3w6b ProSAT]</span></td></tr>
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</table>
</table>
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<div style="background-color:#fffaf0;">
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== Function ==
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== Publication Abstract from PubMed ==
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[https://www.uniprot.org/uniprot/B7XCV4_9RALS B7XCV4_9RALS]
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Chitinase C from Ralstonia sp. A-471 (Ra-ChiC) has a catalytic domain sequence similar to goose-type (G-type) lysozymes and, unlike other chitinases, belongs to glycohydrolase (GH) family 23. Using NMR spectroscopy, however, Ra-ChiC was found to interact only with the chitin dimer but not with the peptidoglycan fragment. Here we report the crystal structures of wild-type, E141Q, and E162Q of the catalytic domain of Ra-ChiC with or without chitin oligosaccharides. Ra-ChiC has a substrate-binding site including a tunnel-shaped cavity, which determines the substrate specificity. Mutation analyses based on this structural information indicated that a highly conserved Glu-141 acts as a catalytic acid, and that Asp-226 located at the roof of the tunnel activates a water molecule as a catalytic base. The unique arrangement of the catalytic residues makes a clear contrast to the other GH23 members and also to inverting GH19 chitinases.
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Crystal Structures of the Catalytic Domain of a Novel Glycohydrolase Family 23 Chitinase from Ralstonia sp. A-471 Reveals a Unique Arrangement of the Catalytic Residues for Inverting Chitin Hydrolysis.,Arimori T, Kawamoto N, Shinya S, Okazaki N, Nakazawa M, Miyatake K, Fukamizo T, Ueda M, Tamada T J Biol Chem. 2013 Jun 28;288(26):18696-706. doi: 10.1074/jbc.M113.462135. Epub, 2013 May 8. PMID:23658014<ref>PMID:23658014</ref>
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==See Also==
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*[[Chitinase 3D structures|Chitinase 3D structures]]
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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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<div class="pdbe-citations 3w6b" style="background-color:#fffaf0;"></div>
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== References ==
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<references/>
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__TOC__
__TOC__
</StructureSection>
</StructureSection>
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[[Category: Chitinase]]
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[[Category: Large Structures]]
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[[Category: Ralstonia sp. a-471]]
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[[Category: Ralstonia sp. A-471]]
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[[Category: Arimori, T]]
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[[Category: Arimori T]]
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[[Category: Fukamizo, T]]
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[[Category: Fukamizo T]]
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[[Category: Kawamoto, N]]
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[[Category: Kawamoto N]]
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[[Category: Miyatake, K]]
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[[Category: Miyatake K]]
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[[Category: Nakazawa, M]]
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[[Category: Nakazawa M]]
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[[Category: Okazaki, N]]
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[[Category: Okazaki N]]
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[[Category: Tamada, T]]
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[[Category: Tamada T]]
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[[Category: Ueda, M]]
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[[Category: Ueda M]]
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[[Category: Enzyme]]
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[[Category: Gh family 23]]
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[[Category: Glycoside hydrolase]]
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[[Category: Hydrolase]]
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Current revision

Crystal structure of catalytic domain of chitinase from Ralstonia sp. A-471

PDB ID 3w6b

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