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4qai

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==P. stipitis OYE2.6-Y78W==
==P. stipitis OYE2.6-Y78W==
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<StructureSection load='4qai' size='340' side='right' caption='[[4qai]], [[Resolution|resolution]] 2.75&Aring;' scene=''>
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<StructureSection load='4qai' size='340' side='right'caption='[[4qai]], [[Resolution|resolution]] 2.75&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>[[4qai]] is a 6 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4QAI OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4QAI FirstGlance]. <br>
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<table><tr><td colspan='2'>[[4qai]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Scheffersomyces_stipitis_CBS_6054 Scheffersomyces stipitis CBS 6054]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4QAI OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4QAI FirstGlance]. <br>
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</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=FMN:FLAVIN+MONONUCLEOTIDE'>FMN</scene><br>
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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]] 2.75&#8491;</td></tr>
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<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4m5p|4m5p]], [[3tjl|3tjl]], [[4df2|4df2]]</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=FMN:FLAVIN+MONONUCLEOTIDE'>FMN</scene></td></tr>
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<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4qai FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4qai OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4qai RCSB], [http://www.ebi.ac.uk/pdbsum/4qai PDBsum]</span></td></tr>
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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=4qai FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4qai OCA], [https://pdbe.org/4qai PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4qai RCSB], [https://www.ebi.ac.uk/pdbsum/4qai PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4qai ProSAT]</span></td></tr>
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<table>
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</table>
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<div style="background-color:#fffaf0;">
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== Function ==
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== Publication Abstract from PubMed ==
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[https://www.uniprot.org/uniprot/A3LT82_PICST A3LT82_PICST]
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A systematic saturation mutagenesis campaign was carried out on an alkene reductase from Pichia stipitis (OYE 2.6) to develop variants with reversed stereoselectivities. Wild-type OYE 2.6 reduces three representative Baylis-Hillman adducts to the corresponding S products with almost complete stereoselectivities and good catalytic efficiencies. We created and screened 13 first-generation, site-saturation mutagenesis libraries, targeting residues found near the bound substrate. One variant (Tyr78Trp) showed high R selectivity toward one of the three substrates, but no change (cyclohexenone derivative) and no catalytic activity (acrylate derivative) for the other two. Subsequent rounds of mutagenesis retained the Tyr78Trp mutation and explored other residues that impacted stereoselectivity when altered in a wild-type background. These efforts yielded double and triple mutants that possessed inverted stereoselectivities for two of the three substrates (conversions &gt;99% and at least 91% ee (R)). To understand the reasons underlying the stereochemical changes, we solved crystal structures of two key mutants: Tyr78Trp and Tyr78Trp/Ile113Cys, the latter with substrate partially occupying the active site. By combining these experimental data with modeling studies, we have proposed a rationale that explains the impacts of the most useful mutations.
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Residues Controlling Facial Selectivity in an Alkene Reductase and Semirational Alterations to Create Stereocomplementary Variants.,Walton AZ, Sullivan B, Patterson-Orazem AC, Stewart JD ACS Catal. 2014 Jul 3;4(7):2307-2318. Epub 2014 May 30. PMID:25068071<ref>PMID:25068071</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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==See Also==
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</div>
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*[[NADPH dehydrogenase|NADPH dehydrogenase]]
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== References ==
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<references/>
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__TOC__
__TOC__
</StructureSection>
</StructureSection>
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[[Category: Stewart, J D.]]
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[[Category: Large Structures]]
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[[Category: Sullivan, B.]]
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[[Category: Scheffersomyces stipitis CBS 6054]]
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[[Category: Walton, A Z.]]
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[[Category: Stewart JD]]
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[[Category: Alkene reductase]]
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[[Category: Sullivan B]]
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[[Category: Flavin oxidoreductase]]
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[[Category: Walton AZ]]
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[[Category: Oxidoreductase]]
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[[Category: Tim barrel]]
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Current revision

P. stipitis OYE2.6-Y78W

PDB ID 4qai

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