2vq4

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[[Image:2vq4.png|left|200px]]
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==CARBOHYDRATE-BINDING OF THE STARCH BINDING DOMAIN OF RHIZOPUS ORYZAE GLUCOAMYLASE IN COMPLEX WITH BETA-CYCLODEXTRIN AND MALTOHEPTAOSE==
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<StructureSection load='2vq4' size='340' side='right' caption='[[2vq4]], [[Resolution|resolution]] 1.25&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[2vq4]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Rhizopus_oryzae Rhizopus oryzae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2VQ4 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2VQ4 FirstGlance]. <br>
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</td></tr><tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2v8l|2v8l]], [[2v8m|2v8m]]</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/Glucan_1,4-alpha-glucosidase Glucan 1,4-alpha-glucosidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.3 3.2.1.3] </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=2vq4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2vq4 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2vq4 RCSB], [http://www.ebi.ac.uk/pdbsum/2vq4 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/vq/2vq4_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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GA (glucoamylase) hydrolyses starch and polysaccharides to beta-D-glucose. RoGA (Rhizopus oryzae GA) consists of two functional domains, an N-terminal SBD (starch-binding domain) and a C-terminal catalytic domain, which are connected by an O-glycosylated linker. In the present study, the crystal structures of the SBD from RoGA (RoGACBM21) and the complexes with beta-cyclodextrin (SBD-betaCD) and maltoheptaose (SBD-G7) were determined. Two carbohydrate binding sites, I (Trp(47)) and II (Tyr(32)), were resolved and their binding was co-operative. Besides the hydrophobic interaction, two unique polyN loops comprising consecutive asparagine residues also participate in the sugar binding. A conformational change in Tyr(32) was observed between unliganded and liganded SBDs. To elucidate the mechanism of polysaccharide binding, a number of mutants were constructed and characterized by a quantitative binding isotherm and Scatchard analysis. A possible binding path for long-chain polysaccharides in RoGACBM21 was proposed.
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{{STRUCTURE_2vq4| PDB=2vq4 | SCENE= }}
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Crystal structures of the starch-binding domain from Rhizopus oryzae glucoamylase reveal a polysaccharide-binding path.,Tung JY, Chang MD, Chou WI, Liu YY, Yeh YH, Chang FY, Lin SC, Qiu ZL, Sun YJ Biochem J. 2008 Nov 15;416(1):27-36. PMID:18588504<ref>PMID:18588504</ref>
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===CARBOHYDRATE-BINDING OF THE STARCH BINDING DOMAIN OF RHIZOPUS ORYZAE GLUCOAMYLASE IN COMPLEX WITH BETA-CYCLODEXTRIN AND MALTOHEPTAOSE===
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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_18588504}}
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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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[[2vq4]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Rhizopus_oryzae Rhizopus oryzae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2VQ4 OCA].
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</StructureSection>
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==Reference==
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<ref group="xtra">PMID:018588504</ref><references group="xtra"/>
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[[Category: Glucan 1,4-alpha-glucosidase]]
[[Category: Glucan 1,4-alpha-glucosidase]]
[[Category: Rhizopus oryzae]]
[[Category: Rhizopus oryzae]]

Revision as of 01:41, 1 October 2014

CARBOHYDRATE-BINDING OF THE STARCH BINDING DOMAIN OF RHIZOPUS ORYZAE GLUCOAMYLASE IN COMPLEX WITH BETA-CYCLODEXTRIN AND MALTOHEPTAOSE

2vq4, resolution 1.25Å

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