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| | ==Crystal structure of hexameric beta-glucosidase in wheat== | | ==Crystal structure of hexameric beta-glucosidase in wheat== |
| - | <StructureSection load='2dga' size='340' side='right' caption='[[2dga]], [[Resolution|resolution]] 1.80Å' scene=''> | + | <StructureSection load='2dga' size='340' side='right'caption='[[2dga]], [[Resolution|resolution]] 1.80Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[2dga]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Canadian_hard_winter_wheat Canadian hard winter wheat]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2DGA OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2DGA FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[2dga]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Canadian_hard_winter_wheat Canadian hard winter wheat]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2DGA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2DGA FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> | + | </td></tr><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=SO4:SULFATE+ION'>SO4</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Taglu1b ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4565 Canadian hard winter wheat])</td></tr> | + | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Taglu1b ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4565 Canadian hard winter wheat])</td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Beta-glucosidase Beta-glucosidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.21 3.2.1.21] </span></td></tr> | + | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Beta-glucosidase Beta-glucosidase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.21 3.2.1.21] </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=2dga FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2dga OCA], [http://pdbe.org/2dga PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2dga RCSB], [http://www.ebi.ac.uk/pdbsum/2dga PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2dga ProSAT]</span></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=2dga FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2dga OCA], [https://pdbe.org/2dga PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2dga RCSB], [https://www.ebi.ac.uk/pdbsum/2dga PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2dga ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/HGL1B_WHEAT HGL1B_WHEAT]] Acts in defense of young plant parts against pests via the production of hydroxamic acids from hydroxamic acid glucosides. Enzymatic activity is highly correlated with plant growth. The preferred substrate is DIMBOA-beta-D-glucoside.<ref>PMID:10750901</ref> <ref>PMID:16751439</ref> | + | [[https://www.uniprot.org/uniprot/HGL1B_WHEAT HGL1B_WHEAT]] Acts in defense of young plant parts against pests via the production of hydroxamic acids from hydroxamic acid glucosides. Enzymatic activity is highly correlated with plant growth. The preferred substrate is DIMBOA-beta-D-glucoside.<ref>PMID:10750901</ref> <ref>PMID:16751439</ref> |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | ==See Also== | | ==See Also== |
| - | *[[Beta-glucosidase|Beta-glucosidase]] | + | *[[Beta-glucosidase 3D structures|Beta-glucosidase 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
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| | [[Category: Beta-glucosidase]] | | [[Category: Beta-glucosidase]] |
| | [[Category: Canadian hard winter wheat]] | | [[Category: Canadian hard winter wheat]] |
| | + | [[Category: Large Structures]] |
| | [[Category: Miyamoto, T]] | | [[Category: Miyamoto, T]] |
| | [[Category: Sue, M]] | | [[Category: Sue, M]] |
| Structural highlights
Function
[HGL1B_WHEAT] Acts in defense of young plant parts against pests via the production of hydroxamic acids from hydroxamic acid glucosides. Enzymatic activity is highly correlated with plant growth. The preferred substrate is DIMBOA-beta-D-glucoside.[1] [2]
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
The wheat (Triticum aestivum) and rye (Secale cereale) beta-D-glucosidases hydrolyze hydroxamic acid-glucose conjugates, exist as different types of isozyme, and function as oligomers. In this study, three cDNAs encoding beta-D-glucosidases (TaGlu1a, TaGlu1b, and TaGlu1c) were isolated from young wheat shoots. Although the TaGlu1s share very high sequence homology, the mRNA level of Taglu1c was much lower than the other two genes in 48- and 96-h-old wheat shoots. The expression ratio of each gene was different between two wheat cultivars. Recombinant TaGlu1b expressed in Escherichia coli was electrophoretically distinct fromTaGlu1a and TaGlu1c. Furthermore, coexpression of TaGlu1a and TaGlu1b gave seven bands on a native-PAGE gel, indicating the formation of both homo- and heterohexamers. One distinctive property of the wheat and rye glucosidases is that they function as hexamers but lose activity when dissociated into smaller oligomers or monomers. The crystal structure of hexameric TaGlu1b was determined at a resolution of 1.8 A. The N-terminal region was located at the dimer-dimer interface and plays a crucial role in hexamer formation. Mutational analyses revealed that the aromatic side chain at position 378, which is located at the entrance to the catalytic center, plays an important role in substrate binding. Additionally, serine-464 and leucine-465 of TaGlu1a were shown to be critical in the relative specificity for DIMBOA-glucose (2-O-beta-D-glucopyranosyl-4-hydroxy-7-methoxy-1,4-benzoxazin-3-one) over DIBOA-glucose (7-demethoxy-DIMBOA-glucose).
Molecular and structural characterization of hexameric beta-D-glucosidases in wheat and rye.,Sue M, Yamazaki K, Yajima S, Nomura T, Matsukawa T, Iwamura H, Miyamoto T Plant Physiol. 2006 Aug;141(4):1237-47. Epub 2006 Jun 2. PMID:16751439[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Sue M, Ishihara A, Iwamura H. Purification and characterization of a hydroxamic acid glucoside beta-glucosidase from wheat (Triticum aestivum L.) seedlings. Planta. 2000 Feb;210(3):432-8. PMID:10750901
- ↑ Sue M, Yamazaki K, Yajima S, Nomura T, Matsukawa T, Iwamura H, Miyamoto T. Molecular and structural characterization of hexameric beta-D-glucosidases in wheat and rye. Plant Physiol. 2006 Aug;141(4):1237-47. Epub 2006 Jun 2. PMID:16751439 doi:10.1104/pp.106.077693
- ↑ Sue M, Yamazaki K, Yajima S, Nomura T, Matsukawa T, Iwamura H, Miyamoto T. Molecular and structural characterization of hexameric beta-D-glucosidases in wheat and rye. Plant Physiol. 2006 Aug;141(4):1237-47. Epub 2006 Jun 2. PMID:16751439 doi:10.1104/pp.106.077693
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