1o4y

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[[Image:1o4y.png|left|200px]]
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==THE THREE-DIMENSIONAL STRUCTURE OF BETA-AGARASE A FROM ZOBELLIA GALACTANIVORANS==
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<StructureSection load='1o4y' size='340' side='right' caption='[[1o4y]], [[Resolution|resolution]] 1.48&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1o4y]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Zobellia_galactanivorans Zobellia galactanivorans]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1O4Y OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1O4Y 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=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene><br>
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<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Beta-agarase Beta-agarase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.81 3.2.1.81] </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=1o4y FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1o4y OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1o4y RCSB], [http://www.ebi.ac.uk/pdbsum/1o4y 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/o4/1o4y_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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Agars are important gelifying agents for biochemical use and the food industry. To cleave the beta-1,4-linkages between beta-d-galactose and alpha-l-3,6-anhydro-galactose residues in the red algal galactans known as agars, marine bacteria produce polysaccharide hydrolases called beta-agarases. Beta-agarases A and B from Zobellia galactanivorans Dsij have recently been biochemically characterized. Here we report the first crystal structure of these two beta-agarases. The two proteins were overproduced in Escherichia coli and crystallized, and the crystal structures were determined at 1.48 and 2.3 A for beta-agarases A and B, respectively. The structure of beta-agarase A was solved by the multiple anomalous diffraction method, whereas beta-agarase B was solved with molecular replacement using beta-agarase A as model. Their structures adopt a jelly roll fold with a deep active site channel harboring the catalytic machinery, namely the nucleophilic residues Glu-147 and Glu-184 and the acid/base residues Glu-152 and Glu-189 for beta-agarases A and B, respectively. The structures of the agarases were compared with those of two lichenases and of a kappa-carrageenase, which all belong to family 16 of the glycoside hydrolases in order to pinpoint the residues responsible for their widely differing substrate specificity. The relationship between structure and enzymatic activity of the two beta-agarases from Z. galactanivorans Dsij was studied by analysis of the degradation products starting with different oligosaccharides. The combination of the structural and biochemical results allowed the determination of the number of subsites present in the catalytic cleft of the beta-agarases.
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{{STRUCTURE_1o4y| PDB=1o4y | SCENE= }}
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The three-dimensional structures of two beta-agarases.,Allouch J, Jam M, Helbert W, Barbeyron T, Kloareg B, Henrissat B, Czjzek M J Biol Chem. 2003 Nov 21;278(47):47171-80. Epub 2003 Sep 11. PMID:12970344<ref>PMID:12970344</ref>
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===THE THREE-DIMENSIONAL STRUCTURE OF BETA-AGARASE A FROM ZOBELLIA GALACTANIVORANS===
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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_12970344}}
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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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[[1o4y]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Zobellia_galactanivorans Zobellia galactanivorans]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1O4Y OCA].
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</StructureSection>
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==Reference==
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<ref group="xtra">PMID:012970344</ref><references group="xtra"/>
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[[Category: Beta-agarase]]
[[Category: Beta-agarase]]
[[Category: Zobellia galactanivorans]]
[[Category: Zobellia galactanivorans]]

Revision as of 18:02, 28 September 2014

THE THREE-DIMENSIONAL STRUCTURE OF BETA-AGARASE A FROM ZOBELLIA GALACTANIVORANS

1o4y, resolution 1.48Å

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