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1nof

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[[Image:1nof.gif|left|200px]]<br /><applet load="1nof" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1nof, resolution 1.42&Aring;" />
 
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'''THE FIRST CRYSTALLOGRAPHIC STRUCTURE OF A XYLANASE FROM GLYCOSYL HYDROLASE FAMILY 5: IMPLICATIONS FOR CATALYSIS'''<br />
 
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==Overview==
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==THE FIRST CRYSTALLOGRAPHIC STRUCTURE OF A XYLANASE FROM GLYCOSYL HYDROLASE FAMILY 5: IMPLICATIONS FOR CATALYSIS==
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The room-temperature structure of xylanase (EC 3.2.1.8) from the bacterial, plant pathogen Erwinia chrysanthemi expressed in Escherichia coli, a 45, kDa, 413-amino acid protein belonging to glycoside hydrolase family 5, has, been determined by multiple isomorphous replacement and refined to a, resolution of 1.42 A. This represents the first structure of a xylanase, not belonging to either glycoside hydrolase family 10 or family 11. The, enzyme is composed of two domains similar to most family 10 xylanases and, the alpha-amylases. The catalytic domain (residues 46-315) has a, (beta/alpha)(8)-barrel motif with a binding cleft along the C-terminal, side of the beta-barrel. The catalytic residues, Glu165 and Glu253, determined by correspondence to other family 5 and family 10 glycoside, hydrolases, lie inside this cleft on the C-terminal ends of beta-strands 4, and 7, respectively, with an O(epsilon)2...O(epsilon)1 distance of 4.22 A., The smaller domain (residues 31-43 and 323-413) has a beta(9)-barrel motif, with five of the strands interfacing with alpha-helices 7 and 8 of the, catalytic domain. The first 13 N-terminal residues form one beta-strand of, this domain. Residues 44, 45, and 316-322 form the linkers between this, domain and the catalytic domain.
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<StructureSection load='1nof' size='340' side='right'caption='[[1nof]], [[Resolution|resolution]] 1.42&Aring;' scene=''>
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== Structural highlights ==
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==About this Structure==
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<table><tr><td colspan='2'>[[1nof]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Dickeya_chrysanthemi Dickeya chrysanthemi]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1NOF OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1NOF FirstGlance]. <br>
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1NOF is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Erwinia_chrysanthemi Erwinia chrysanthemi] with ACT as [http://en.wikipedia.org/wiki/ligand ligand]. Active as [http://en.wikipedia.org/wiki/Endo-1,4-beta-xylanase Endo-1,4-beta-xylanase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.8 3.2.1.8] Known structural/functional Sites: <scene name='pdbsite=ACI:Catalytic Acid/Base'>ACI</scene> and <scene name='pdbsite=NUC:Catalytic Nucleophile'>NUC</scene>. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1NOF OCA].
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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]] 1.42&#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=ACT:ACETATE+ION'>ACT</scene></td></tr>
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==Reference==
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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=1nof FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1nof OCA], [https://pdbe.org/1nof PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1nof RCSB], [https://www.ebi.ac.uk/pdbsum/1nof PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1nof ProSAT]</span></td></tr>
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First crystallographic structure of a xylanase from glycoside hydrolase family 5: implications for catalysis., Larson SB, Day J, Barba de la Rosa AP, Keen NT, McPherson A, Biochemistry. 2003 Jul 22;42(28):8411-22. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=12859186 12859186]
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</table>
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[[Category: Endo-1,4-beta-xylanase]]
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== Function ==
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[[Category: Erwinia chrysanthemi]]
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[https://www.uniprot.org/uniprot/Q46961_DICCH Q46961_DICCH]
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[[Category: Single protein]]
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== Evolutionary Conservation ==
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[[Category: Day, J.]]
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[[Image:Consurf_key_small.gif|200px|right]]
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[[Category: Keen, N.T.]]
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Check<jmol>
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[[Category: Larson, S.B.]]
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<jmolCheckbox>
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[[Category: McPherson, A.]]
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/no/1nof_consurf.spt"</scriptWhenChecked>
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[[Category: Rosa, A.P.Barba.De.La.]]
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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[[Category: ACT]]
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<text>to colour the structure by Evolutionary Conservation</text>
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[[Category: carbohydrate-binding module]]
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</jmolCheckbox>
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[[Category: catalytic domain]]
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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=1nof ConSurf].
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[[Category: glycohydrolase family 5]]
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<div style="clear:both"></div>
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[[Category: xylanase]]
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__TOC__
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</StructureSection>
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Dec 18 16:49:29 2007''
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[[Category: Dickeya chrysanthemi]]
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[[Category: Large Structures]]
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[[Category: Barba De La Rosa AP]]
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[[Category: Day J]]
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[[Category: Keen NT]]
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[[Category: Larson SB]]
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[[Category: McPherson A]]

Current revision

THE FIRST CRYSTALLOGRAPHIC STRUCTURE OF A XYLANASE FROM GLYCOSYL HYDROLASE FAMILY 5: IMPLICATIONS FOR CATALYSIS

PDB ID 1nof

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