1urx

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[[Image:1urx.gif|left|200px]]
 
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==Crystallographic structure of beta-agarase A in complex with oligoagarose==
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The line below this paragraph, containing "STRUCTURE_1urx", creates the "Structure Box" on the page.
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<StructureSection load='1urx' size='340' side='right'caption='[[1urx]], [[Resolution|resolution]] 1.70&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[1urx]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Zobellia_galactanivorans Zobellia galactanivorans]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1URX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1URX FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.7&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=AAL:3,6-ANHYDRO-L-GALACTOSE'>AAL</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=GAL:BETA-D-GALACTOSE'>GAL</scene>, <scene name='pdbligand=GLA:ALPHA+D-GALACTOSE'>GLA</scene></td></tr>
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{{STRUCTURE_1urx| PDB=1urx | SCENE= }}
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1urx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1urx OCA], [https://pdbe.org/1urx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1urx RCSB], [https://www.ebi.ac.uk/pdbsum/1urx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1urx ProSAT]</span></td></tr>
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</table>
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'''CRYSTALLOGRAPHIC STRUCTURE OF BETA-AGARASE A IN COMPLEX WITH OLIGOAGAROSE'''
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== Function ==
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[https://www.uniprot.org/uniprot/AGAA_ZOBGA AGAA_ZOBGA] Cleaves the beta-1,4-linkages between beta-D-galactose and alpha-L-3,6-anhydro-galactose residues in agarose. Cleaves agarose in a random manner with retention of the anomeric-bond configuration, producing beta-anomers that give rise progressively to alpha-anomers when mutarotation takes place.<ref>PMID:15456406</ref>
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== Evolutionary Conservation ==
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==Overview==
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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/ur/1urx_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/main_output.php?pdb_ID=1urx 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 ==
Agarose is a gel-forming polysaccharide with an alpha-L(1,4)-3,6-anhydro-galactose, beta-D(1,3)-galactose repeat unit, from the cell walls of marine red algae. beta-agarase A, from the Gram-negative bacterium Zobellia galactanivorans, is secreted to the external medium and degrades agarose with an endo-mechanism. The structure of the inactive mutant beta-agarase A-E147S in complex with agaro-octaose has been solved at 1.7 A resolution. Two oligosaccharide chains are bound to the protein. The first one resides in the active site channel, spanning subsites -4 to -1. A second oligosaccharide binding site, on the opposite side of the protein, was filled with eight sugar units, parallel to the active site. The crystal structure of the beta-agarase A with agaro-octaose provides detailed information on agarose recognition in the catalytic site. The presence of the second, parallel, binding site suggests that the enzyme might be able to unwind the double-helical structure of agarose prior to the catalytic cleavage.
Agarose is a gel-forming polysaccharide with an alpha-L(1,4)-3,6-anhydro-galactose, beta-D(1,3)-galactose repeat unit, from the cell walls of marine red algae. beta-agarase A, from the Gram-negative bacterium Zobellia galactanivorans, is secreted to the external medium and degrades agarose with an endo-mechanism. The structure of the inactive mutant beta-agarase A-E147S in complex with agaro-octaose has been solved at 1.7 A resolution. Two oligosaccharide chains are bound to the protein. The first one resides in the active site channel, spanning subsites -4 to -1. A second oligosaccharide binding site, on the opposite side of the protein, was filled with eight sugar units, parallel to the active site. The crystal structure of the beta-agarase A with agaro-octaose provides detailed information on agarose recognition in the catalytic site. The presence of the second, parallel, binding site suggests that the enzyme might be able to unwind the double-helical structure of agarose prior to the catalytic cleavage.
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==About this Structure==
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Parallel substrate binding sites in a beta-agarase suggest a novel mode of action on double-helical agarose.,Allouch J, Helbert W, Henrissat B, Czjzek M Structure. 2004 Apr;12(4):623-32. PMID:15062085<ref>PMID:15062085</ref>
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1URX is a [[Single protein]] structure of 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=1URX OCA].
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==Reference==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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Parallel substrate binding sites in a beta-agarase suggest a novel mode of action on double-helical agarose., Allouch J, Helbert W, Henrissat B, Czjzek M, Structure. 2004 Apr;12(4):623-32. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15062085 15062085]
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</div>
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[[Category: Beta-agarase]]
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<div class="pdbe-citations 1urx" style="background-color:#fffaf0;"></div>
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[[Category: Single protein]]
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== References ==
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<references/>
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__TOC__
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</StructureSection>
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[[Category: Large Structures]]
[[Category: Zobellia galactanivorans]]
[[Category: Zobellia galactanivorans]]
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[[Category: Allouch, J.]]
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[[Category: Allouch J]]
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[[Category: Czjzek, M.]]
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[[Category: Czjzek M]]
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[[Category: Helbert, W.]]
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[[Category: Helbert W]]
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[[Category: Henrissat, B.]]
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[[Category: Henrissat B]]
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[[Category: Agarose]]
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[[Category: Beta-agarase]]
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[[Category: Double helix]]
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[[Category: Family 16]]
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[[Category: Glycoside hydrolase]]
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[[Category: Two binding-site]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 11:36:22 2008''
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Current revision

Crystallographic structure of beta-agarase A in complex with oligoagarose

PDB ID 1urx

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