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2jke

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[[Image:2jke.png|left|200px]]
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==STRUCTURE OF A FAMILY 97 ALPHA-GLUCOSIDASE FROM BACTEROIDES THETAIOTAOMICRON IN COMPLEX WITH DEOXYNOJIRIMYCIN==
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<StructureSection load='2jke' size='340' side='right' caption='[[2jke]], [[Resolution|resolution]] 1.70&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[2jke]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Bacteroides_thetaiotaomicron Bacteroides thetaiotaomicron]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2JKE OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2JKE FirstGlance]. <br>
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</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=NOJ:1-DEOXYNOJIRIMYCIN'>NOJ</scene><br>
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<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2jka|2jka]], [[2jkp|2jkp]]</td></tr>
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<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Alpha-glucosidase Alpha-glucosidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.20 3.2.1.20] </span></td></tr>
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<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2jke FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2jke OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2jke RCSB], [http://www.ebi.ac.uk/pdbsum/2jke PDBsum]</span></td></tr>
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<table>
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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/jk/2jke_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/chain_selection.php?pdb_ID=2ata 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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Enzymatic cleavage of the glycosidic bond yields products in which the anomeric configuration is either retained or inverted. Each mechanism reflects the dispositions of the enzyme functional groups; a facet of which is essentially conserved in 113 glycoside hydrolase (GH) families. We show that family GH97 has diverged significantly, as it contains both inverting and retaining alpha-glycosidases. This reflects evolution of the active center; a glutamate acts as a general base in inverting members, exemplified by Bacteroides thetaiotaomicron alpha-glucosidase BtGH97a, whereas an aspartate likely acts as a nucleophile in retaining members. The structure of BtGH97a and its complexes with inhibitors, coupled to kinetic analysis of active-site variants, reveals an unusual calcium ion dependence. 1H NMR analysis shows an inversion mechanism for BtGH97a, whereas another GH97 enzyme from B. thetaiotaomicron, BtGH97b, functions as a retaining alpha-galactosidase.
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{{STRUCTURE_2jke| PDB=2jke | SCENE= }}
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Divergence of catalytic mechanism within a glycosidase family provides insight into evolution of carbohydrate metabolism by human gut flora.,Gloster TM, Turkenburg JP, Potts JR, Henrissat B, Davies GJ Chem Biol. 2008 Oct 20;15(10):1058-67. Epub 2008 Oct 9. PMID:18848471<ref>PMID:18848471</ref>
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===STRUCTURE OF A FAMILY 97 ALPHA-GLUCOSIDASE FROM BACTEROIDES THETAIOTAOMICRON IN COMPLEX WITH DEOXYNOJIRIMYCIN===
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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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{{ABSTRACT_PUBMED_18848471}}
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== References ==
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<references/>
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==About this Structure==
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__TOC__
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[[2jke]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Bacteroides_thetaiotaomicron Bacteroides thetaiotaomicron]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2JKE OCA].
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</StructureSection>
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==Reference==
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<ref group="xtra">PMID:018848471</ref><references group="xtra"/>
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[[Category: Alpha-glucosidase]]
[[Category: Alpha-glucosidase]]
[[Category: Bacteroides thetaiotaomicron]]
[[Category: Bacteroides thetaiotaomicron]]

Revision as of 08:09, 30 September 2014

STRUCTURE OF A FAMILY 97 ALPHA-GLUCOSIDASE FROM BACTEROIDES THETAIOTAOMICRON IN COMPLEX WITH DEOXYNOJIRIMYCIN

2jke, resolution 1.70Å

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