View source for 1qnr


==The 3-D structure of a Trichoderma reesei b-mannanase from glycoside hydrolase family 5==
<StructureSection load='1qnr' size='340' side='right'caption='[[1qnr]], [[Resolution|resolution]] 1.40&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1qnr]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Trichoderma_reesei Trichoderma reesei]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1QNR OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1QNR 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]] 1.4&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BMA:BETA-D-MANNOSE'>BMA</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=PRD_900115:4beta-beta-mannobiose'>PRD_900115</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=1qnr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1qnr OCA], [https://pdbe.org/1qnr PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1qnr RCSB], [https://www.ebi.ac.uk/pdbsum/1qnr PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1qnr ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/MANA_HYPJR MANA_HYPJR] Endo-1,4-mannanase that catalyzes the random hydrolysis of (1->4)-beta-D-mannosidic linkages in mannans and heteromannans. It is a crucial enzyme for depolymerization of seed galactomannans and wood galactoglucomannans. Active against locust bean gum and ivory nut mannan, releasing mainly tri- and disaccharides (PubMed:7793911, PubMed:8529653, Ref.3, Ref.4). Also has transglycosylation activity. Transglycosylation of two mannotrioses into a mannohexaose is the major transglycosylation route (PubMed:24950755, PubMed:8529653, Ref.7).<ref>PMID:24950755</ref> <ref>PMID:7793911</ref> <ref>PMID:8529653</ref> [PROSITE-ProRule:PRU00597][SAM:MobiDB-lite]<ref>PMID:24950755</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/qn/1qnr_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.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=1qnr ConSurf].
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== Publication Abstract from PubMed ==
The crystal structure of the catalytic core domain of beta-mannanase from the fungus Trichoderma reesei has been determined at a resolution of 1.5 A. The structure was solved using the anomalous scattering from a single non-isomorphous platinum complex with two heavy-metal sites in space group P2(1). The map computed with the experimental phases was enhanced by the application of an automated model building and refinement procedure using the amplitudes and experimental phases as observations. This approach is expected to be of more general application. The structure of the native enzyme and complexes with Tris-HCl and mannobiose are also reported: the mannobiose binds in subsites +1 and +2. The structure is briefly compared with that of the homologous beta-mannanase from the bacterium Thermomonospora fusca.

The three-dimensional structure of a Trichoderma reesei beta-mannanase from glycoside hydrolase family 5.,Sabini E, Schubert H, Murshudov G, Wilson KS, Siika-Aho M, Penttila M Acta Crystallogr D Biol Crystallogr. 2000 Jan;56(Pt 1):3-13. PMID:10666621<ref>PMID:10666621</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 1qnr" style="background-color:#fffaf0;"></div>

==See Also==
*[[Mannosidase 3D structures|Mannosidase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Trichoderma reesei]]
[[Category: Murshudov G]]
[[Category: Penttila M]]
[[Category: Sabini E]]
[[Category: Schubert H]]
[[Category: Siika-Aho M]]
[[Category: Wilson KS]]