2r4t

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[[Image:2r4t.png|left|200px]]
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==Crystal Structure of Wild-type E.coli GS in Complex with ADP and Glucose(wtGSc)==
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<StructureSection load='2r4t' size='340' side='right' caption='[[2r4t]], [[Resolution|resolution]] 2.26&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[2r4t]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2R4T OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2R4T FirstGlance]. <br>
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</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=250:(2R)-2-HYDROXY-3-[4-(2-HYDROXYETHYL)PIPERAZIN-1-YL]PROPANE-1-SULFONIC+ACID'>250</scene>, <scene name='pdbligand=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</scene>, <scene name='pdbligand=GLC:ALPHA-D-GLUCOSE'>GLC</scene>, <scene name='pdbligand=PE3:3,6,9,12,15,18,21,24,27,30,33,36,39-TRIDECAOXAHENTETRACONTANE-1,41-DIOL'>PE3</scene><br>
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<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2qyy|2qyy]], [[2qzs|2qzs]], [[2r4u|2r4u]]</td></tr>
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<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">glgA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 Escherichia coli])</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/Starch_synthase Starch synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.4.1.21 2.4.1.21] </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=2r4t FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2r4t OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2r4t RCSB], [http://www.ebi.ac.uk/pdbsum/2r4t 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/r4/2r4t_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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Escherichia coli glycogen synthase (EcGS, EC 2.4.1.21) is a retaining glycosyltransferase (GT) that transfers glucose from adenosine diphosphate glucose to a glucan chain acceptor with retention of configuration at the anomeric carbon. EcGS belongs to the GT-B structural superfamily. Here we report several EcGS x-ray structures that together shed considerable light on the structure and function of these enzymes. The structure of the wild-type enzyme bound to ADP and glucose revealed a 15.2 degrees overall domain-domain closure and provided for the first time the structure of the catalytically active, closed conformation of a glycogen synthase. The main chain carbonyl group of His-161, Arg-300, and Lys-305 are suggested by the structure to act as critical catalytic residues in the transglycosylation. Glu-377, previously thought to be catalytic is found on the alpha-face of the glucose and plays an electrostatic role in the active site and as a glucose ring locator. This is also consistent with the structure of the EcGS(E377A)-ADP-HEPPSO complex where the glucose moiety is either absent or disordered in the active site.
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{{STRUCTURE_2r4t| PDB=2r4t | SCENE= }}
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The crystal structures of the open and catalytically competent closed conformation of Escherichia coli glycogen synthase.,Sheng F, Jia X, Yep A, Preiss J, Geiger JH J Biol Chem. 2009 Jun 26;284(26):17796-807. Epub 2009 Feb 25. PMID:19244233<ref>PMID:19244233</ref>
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===Crystal Structure of Wild-type E.coli GS in Complex with ADP and Glucose(wtGSc)===
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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_19244233}}
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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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[[2r4t]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2R4T OCA].
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</StructureSection>
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==Reference==
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<ref group="xtra">PMID:019244233</ref><references group="xtra"/>
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[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
[[Category: Starch synthase]]
[[Category: Starch synthase]]

Revision as of 18:02, 30 September 2014

Crystal Structure of Wild-type E.coli GS in Complex with ADP and Glucose(wtGSc)

2r4t, resolution 2.26Å

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