1j9y: Difference between revisions

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-[[Image:1j9y.gif|left|200px]]<br /><applet load="1j9y" size="350" color="white" frame="true" align="right" spinBox="true"
-caption="1j9y, resolution 1.85&Aring;" />
-'''Crystal structure of mannanase 26A from Pseudomonas cellulosa'''<br />
-==Overview==
+==Crystal structure of mannanase 26A from Pseudomonas cellulosa==
-The crystal structure of Pseudomonas cellulosa mannanase 26A has been solved by multiple isomorphous replacement and refined at 1.85 A resolution to an R-factor of 0.182 (R-free = 0.211). The enzyme comprises (beta/alpha)(8)-barrel architecture with two catalytic glutamates at the ends of beta-strands 4 and 7 in precisely the same location as the corresponding glutamates in other 4/7-superfamily glycoside hydrolase enzymes (clan GH-A glycoside hydrolases). The family 26 glycoside hydrolases are therefore members of clan GH-A. Functional analyses of mannanase 26A, informed by the crystal structure of the enzyme, provided important insights into the role of residues close to the catalytic glutamates. These data showed that Trp-360 played a critical role in binding substrate at the -1 subsite, whereas Tyr-285 was important to the function of the nucleophile catalyst. His-211 in mannanase 26A does not have the same function as the equivalent asparagine in the other GH-A enzymes. The data also suggest that Trp-217 and Trp-162 are important for the activity of mannanase 26A against mannooligosaccharides but are less important for activity against polysaccharides.
+<StructureSection load='1j9y' size='340' side='right'caption='[[1j9y]], [[Resolution|resolution]] 1.85&Aring;' scene=''>
+== Structural highlights ==
+<table><tr><td colspan='2'>[[1j9y]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Cellvibrio_japonicus Cellvibrio japonicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1J9Y OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1J9Y FirstGlance]. <br>
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.85&#8491;</td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1j9y FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1j9y OCA], [https://pdbe.org/1j9y PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1j9y RCSB], [https://www.ebi.ac.uk/pdbsum/1j9y PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1j9y ProSAT]</span></td></tr>
+</table>
+== Function ==
+[https://www.uniprot.org/uniprot/MANA_CELJU MANA_CELJU] Hydrolyzes mannan and galactomannan, but displays little activity towards other polysaccharides located in the plant cell wall. Appears to act in synergy with alpha-galactosidase (AgaA) to elicit hydrolysis of galactomannan. Preferentially hydrolyzes the larger oligosaccharides and has greater activity against non-substituted polysaccharides.<ref>PMID:7848261</ref> <ref>PMID:11064195</ref>
+== Evolutionary Conservation ==
+[[Image:Consurf_key_small.gif|200px|right]]
+Check<jmol>
+  <jmolCheckbox>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/j9/1j9y_consurf.spt"</scriptWhenChecked>
+    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
+    <text>to colour the structure by Evolutionary Conservation</text>
+  </jmolCheckbox>
+</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=1j9y ConSurf].
+<div style="clear:both"></div>
-==About this Structure==
+==See Also==
-J9Y is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Cellvibrio_japonicus Cellvibrio japonicus] with <scene name='pdbligand=ZN:'>ZN</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Active as [http://en.wikipedia.org/wiki/Mannan_endo-1,4-beta-mannosidase Mannan endo-1,4-beta-mannosidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.78 3.2.1.78] Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1J9Y OCA].
+*[[Mannosidase 3D structures|Mannosidase 3D structures]]
+== References ==
-==Reference==
+<references/>
-Crystal structure of mannanase 26A from Pseudomonas cellulosa and analysis of residues involved in substrate binding., Hogg D, Woo EJ, Bolam DN, McKie VA, Gilbert HJ, Pickersgill RW, J Biol Chem. 2001 Aug 17;276(33):31186-92. Epub 2001 May 29. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=11382747 11382747]
+__TOC__
+</StructureSection>
 [[Category: Cellvibrio japonicus]]
-[[Category: Mannan endo-1,4-beta-mannosidase]]
+[[Category: Large Structures]]
-[[Category: Single protein]]
+[[Category: Bolam DN]]
-[[Category: Bolam, D N.]]
+[[Category: Gilbert HJ]]
-[[Category: Gilbert, H J.]]
+[[Category: Hogg D]]
-[[Category: Hogg, D.]]
+[[Category: McKie VA]]
-[[Category: McKie, V A.]]
+[[Category: Pickersgill RW]]
-[[Category: Pickersgill, R W.]]
+[[Category: Woo E-J]]
-[[Category: Woo, E J.]]
-[[Category: ZN]]
-[[Category: 4/7-superfamily of glycoside hydrolases]]
-[[Category: beta/alpha barrel]]
-[[Category: clan gh-a]]
-[[Category: family 26 glycoside hydrolase]]
-[[Category: tim barrel]]
-''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 13:20:15 2008''