3fdy: Difference between revisions
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==Pyranose 2-oxidase thermostable triple mutant, T169G/E542K/V546C== | ==Pyranose 2-oxidase thermostable triple mutant, T169G/E542K/V546C== | ||
<StructureSection load='3fdy' size='340' side='right' caption='[[3fdy]], [[Resolution|resolution]] 1.55Å' scene=''> | <StructureSection load='3fdy' size='340' side='right'caption='[[3fdy]], [[Resolution|resolution]] 1.55Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[3fdy]] is a 1 chain structure with sequence from [ | <table><tr><td colspan='2'>[[3fdy]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Trametes_ochracea Trametes ochracea]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3FDY OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3FDY FirstGlance]. <br> | ||
</td></tr><tr id=' | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.55Å</td></tr> | ||
<tr id=' | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FAD:FLAVIN-ADENINE+DINUCLEOTIDE'>FAD</scene>, <scene name='pdbligand=MES:2-(N-MORPHOLINO)-ETHANESULFONIC+ACID'>MES</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=3fdy FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3fdy OCA], [https://pdbe.org/3fdy PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3fdy RCSB], [https://www.ebi.ac.uk/pdbsum/3fdy PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3fdy ProSAT]</span></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | |||
</table> | </table> | ||
== Function == | |||
[https://www.uniprot.org/uniprot/Q7ZA32_TRAOC Q7ZA32_TRAOC] | |||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
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<jmolCheckbox> | <jmolCheckbox> | ||
<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/fd/3fdy_consurf.spt"</scriptWhenChecked> | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/fd/3fdy_consurf.spt"</scriptWhenChecked> | ||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/ | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked> | ||
<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
</jmolCheckbox> | </jmolCheckbox> | ||
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__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: | [[Category: Trametes ochracea]] | ||
[[Category: Divne | [[Category: Divne C]] | ||
[[Category: Tan | [[Category: Tan TC]] | ||
Latest revision as of 12:07, 30 October 2024
Pyranose 2-oxidase thermostable triple mutant, T169G/E542K/V546CPyranose 2-oxidase thermostable triple mutant, T169G/E542K/V546C
Structural highlights
FunctionEvolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedIn order to increase the thermal stability and the catalytic properties of pyranose oxidase (P2Ox) from Trametes multicolor toward its poor substrate D-galactose and the alternative electron acceptor 1,4-benzoquinone (1,4-BQ), we designed the triple-mutant T169G/E542K/V546C. Whereas the wild-type enzyme clearly favors D-glucose as its substrate over D-galactose [substrate selectivity (k(cat)/K(M))(Glc)/(k(cat)/K(M))(Gal) = 172], the variant oxidizes both sugars equally well [(k(cat)/K(M))(Glc)/(k(cat)/K(M))(Gal) = 0.69], which is of interest for food biotechnology. Furthermore, the variant showed lower K(M) values and approximately ten-fold higher k(cat) values for 1,4-BQ when D-galactose was used as the saturating sugar substrate, which makes this enzyme particularly attractive for use in biofuel cells and enzyme-based biosensors. In addition to the altered substrate specificity and reactivity, this mutant also shows significantly improved thermal stability. The half life time at 60 degrees C was approximately 10 h, compared to 7.6 min for the wild-type enzyme. We performed successfully small-scale bioreactor pilot conversion experiments of D-glucose/D-galactose mixtures at both 30 and 50 degrees C, showing the usefulness of this P2Ox variant in biocatalysis as well as the enhanced thermal stability of the enzyme. Moreover, we determined the crystal structure of the mutant in its unligated form at 1.55 A resolution. Modeling D-galactose in position for oxidation at C2 into the mutant active site shows that substituting Thr for Gly at position 169 favorably accommodates the axial C4 hydroxyl group that would otherwise clash with Thr169 in the wild-type. A thermostable triple mutant of pyranose 2-oxidase from Trametes multicolor with improved properties for biotechnological applications.,Spadiut O, Radakovits K, Pisanelli I, Salaheddin C, Yamabhai M, Tan TC, Divne C, Haltrich D Biotechnol J. 2009 Mar 16. PMID:19291706[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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