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| | ==Crystal structure of a glycoside hydrolase family 43 arabinoxylan arabinofuranohydrolase from Bacillus subtilis in complex with xylotetraose.== | | ==Crystal structure of a glycoside hydrolase family 43 arabinoxylan arabinofuranohydrolase from Bacillus subtilis in complex with xylotetraose.== |
| - | <StructureSection load='3c7g' size='340' side='right' caption='[[3c7g]], [[Resolution|resolution]] 2.02Å' scene=''> | + | <StructureSection load='3c7g' size='340' side='right'caption='[[3c7g]], [[Resolution|resolution]] 2.02Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3c7g]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_globigii"_migula_1900 "bacillus globigii" migula 1900]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3C7G OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3C7G FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3c7g]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Bacillus_subtilis Bacillus subtilis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3C7G OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3C7G FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=XYP:BETA-D-XYLOPYRANOSE'>XYP</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.02Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3c7e|3c7e]], [[3c7f|3c7f]], [[3c7h|3c7h]], [[3c7o|3c7o]]</td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=XYP:BETA-D-XYLOPYRANOSE'>XYP</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">xynD ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1423 "Bacillus globigii" Migula 1900])</td></tr> | + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3c7g FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3c7g OCA], [https://pdbe.org/3c7g PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3c7g RCSB], [https://www.ebi.ac.uk/pdbsum/3c7g PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3c7g ProSAT]</span></td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Non-reducing_end_alpha-L-arabinofuranosidase Non-reducing end alpha-L-arabinofuranosidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.55 3.2.1.55] </span></td></tr> | + | |
| - | <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=3c7g FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3c7g OCA], [http://pdbe.org/3c7g PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3c7g RCSB], [http://www.ebi.ac.uk/pdbsum/3c7g PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3c7g ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/XYND_BACSU XYND_BACSU]] Cleaves arabinose units from O-2- or O-3-monosubstituted xylose residues, thereby assisting in arabinoxylan (AX) and short-chain arabinoxylo-oligosaccharide (AXOS) degradation. Is more active on wheat bran AXOS than on wheat water-extractable AX and rye water-extractable AX. Does not display endoxylanase, xylosidase or arabinanase activity.<ref>PMID:17426966</ref> | + | [https://www.uniprot.org/uniprot/XYND_BACSU XYND_BACSU] Cleaves arabinose units from O-2- or O-3-monosubstituted xylose residues, thereby assisting in arabinoxylan (AX) and short-chain arabinoxylo-oligosaccharide (AXOS) degradation. Is more active on wheat bran AXOS than on wheat water-extractable AX and rye water-extractable AX. Does not display endoxylanase, xylosidase or arabinanase activity.<ref>PMID:17426966</ref> |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
| | Check<jmol> | | Check<jmol> |
| | <jmolCheckbox> | | <jmolCheckbox> |
| - | <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/c7/3c7g_consurf.spt"</scriptWhenChecked> | + | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/c7/3c7g_consurf.spt"</scriptWhenChecked> |
| | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> |
| | <text>to colour the structure by Evolutionary Conservation</text> | | <text>to colour the structure by Evolutionary Conservation</text> |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Bacillus globigii migula 1900]] | + | [[Category: Bacillus subtilis]] |
| - | [[Category: Non-reducing end alpha-L-arabinofuranosidase]] | + | [[Category: Large Structures]] |
| - | [[Category: Bourgois, T M]] | + | [[Category: Bourgois TM]] |
| - | [[Category: Campenhout, S Van]] | + | [[Category: Courtin CM]] |
| - | [[Category: Courtin, C M]] | + | [[Category: Delcour JA]] |
| - | [[Category: Delcour, J A]] | + | [[Category: Rabijns A]] |
| - | [[Category: Rabijns, A]] | + | [[Category: Strelkov SV]] |
| - | [[Category: Strelkov, S V]] | + | [[Category: Van Campenhout S]] |
| - | [[Category: Vandermarliere, E]] | + | [[Category: Vandermarliere E]] |
| - | [[Category: Volckaert, G]] | + | [[Category: Volckaert G]] |
| - | [[Category: Winn, M D]] | + | [[Category: Winn MD]] |
| - | [[Category: 5-bladed beta-propeller fold]]
| + | |
| - | [[Category: Beta-sandwich]]
| + | |
| - | [[Category: Hydrolase]]
| + | |
| - | [[Category: Xylan degradation]]
| + | |
| Structural highlights
Function
XYND_BACSU Cleaves arabinose units from O-2- or O-3-monosubstituted xylose residues, thereby assisting in arabinoxylan (AX) and short-chain arabinoxylo-oligosaccharide (AXOS) degradation. Is more active on wheat bran AXOS than on wheat water-extractable AX and rye water-extractable AX. Does not display endoxylanase, xylosidase or arabinanase activity.[1]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
AXHs (arabinoxylan arabinofuranohydrolases) are alpha-L-arabinofuranosidases that specifically hydrolyse the glycosidic bond between arabinofuranosyl substituents and xylopyranosyl backbone residues of arabinoxylan. Bacillus subtilis was recently shown to produce an AXH that cleaves arabinose units from O-2- or O-3-mono-substituted xylose residues: BsAXH-m2,3 (B. subtilis AXH-m2,3). Crystallographic analysis reveals a two-domain structure for this enzyme: a catalytic domain displaying a five-bladed beta-propeller fold characteristic of GH (glycoside hydrolase) family 43 and a CBM (carbohydrate-binding module) with a beta-sandwich fold belonging to CBM family 6. Binding of substrate to BsAXH-m2,3 is largely based on hydrophobic stacking interactions, which probably allow the positional flexibility needed to hydrolyse both arabinose substituents at the O-2 or O-3 position of the xylose unit. Superposition of the BsAXH-m2,3 structure with known structures of the GH family 43 exo-acting enzymes, beta-xylosidase and alpha-L-arabinanase, each in complex with their substrate, reveals a different orientation of the sugar backbone.
Structural analysis of a glycoside hydrolase family 43 arabinoxylan arabinofuranohydrolase in complex with xylotetraose reveals a different binding mechanism compared with other members of the same family.,Vandermarliere E, Bourgois TM, Winn MD, van Campenhout S, Volckaert G, Delcour JA, Strelkov SV, Rabijns A, Courtin CM Biochem J. 2009 Feb 15;418(1):39-47. PMID:18980579[2]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Bourgois TM, Van Craeyveld V, Van Campenhout S, Courtin CM, Delcour JA, Robben J, Volckaert G. Recombinant expression and characterization of XynD from Bacillus subtilis subsp. subtilis ATCC 6051: a GH 43 arabinoxylan arabinofuranohydrolase. Appl Microbiol Biotechnol. 2007 Jul;75(6):1309-17. Epub 2007 Apr 11. PMID:17426966 doi:http://dx.doi.org/10.1007/s00253-007-0956-2
- ↑ Vandermarliere E, Bourgois TM, Winn MD, van Campenhout S, Volckaert G, Delcour JA, Strelkov SV, Rabijns A, Courtin CM. Structural analysis of a glycoside hydrolase family 43 arabinoxylan arabinofuranohydrolase in complex with xylotetraose reveals a different binding mechanism compared with other members of the same family. Biochem J. 2009 Feb 15;418(1):39-47. PMID:18980579 doi:http://dx.doi.org/10.1042/BJ20081256
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