View source for 8ixm


==Pseudomoans Aerugiona Wildtype Ketopantoate Reductase ternary complex with NADP+ and alpha-Ketoisocaproic acid==
<StructureSection load='8ixm' size='340' side='right'caption='[[8ixm]], [[Resolution|resolution]] 1.96&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[8ixm]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Pseudomonas_aeruginosa Pseudomonas aeruginosa]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8IXM OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8IXM 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]] 1.96&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=COI:2-OXO-4-METHYLPENTANOIC+ACID'>COI</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=NAP:NADP+NICOTINAMIDE-ADENINE-DINUCLEOTIDE+PHOSPHATE'>NAP</scene>, <scene name='pdbligand=NHE:2-[N-CYCLOHEXYLAMINO]ETHANE+SULFONIC+ACID'>NHE</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=8ixm FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8ixm OCA], [https://pdbe.org/8ixm PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8ixm RCSB], [https://www.ebi.ac.uk/pdbsum/8ixm PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8ixm ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q9I2Y5_PSEAE Q9I2Y5_PSEAE] Catalyzes the NADPH-dependent reduction of ketopantoate into pantoic acid.[RuleBase:RU362068]
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Theoretical concepts linking the structure, function, and evolution of a protein, while often intuitive, necessitate validation through investigations in real-world systems. Our study empirically explores the evolutionary implications of multiple gene copies in an organism by shedding light on the structure-function modulations observed in Pseudomonas aeruginosa's second copy of ketopantoate reductase (PaKPR2). We demonstrated with two apo structures that the typical active site cleft of the protein transforms into a two-sided pocket where a molecular gate made up of two residues controls the substrate entry site, resulting in its inactivity toward the natural substrate ketopantoate. Strikingly, this structural modification made the protein active against several important alpha-keto-acid substrates with varied efficiency. Structural constraints at the binding site for this altered functional trait were analyzed with two binary complexes that show the conserved residue microenvironment faces restricted movements due to domain closure. Finally, its mechanistic highlights gathered from a ternary complex structure help in delineating the molecular perspectives behind its kinetic cooperativity toward these broad range of substrates. Detailed structural characteristics of the protein presented here also identified four key amino acid residues responsible for its versatile alpha-keto-acid reductase activity, which can be further modified to improve its functional properties through protein engineering.

Implication of Molecular Constraints Facilitating the Functional Evolution of Pseudomonas aeruginosa KPR2 into a Versatile alpha-Keto-Acid Reductase.,Basu Choudhury G, Datta S Biochemistry. 2024 Jul 16;63(14):1808-1823. doi: 10.1021/acs.biochem.4c00087. , Epub 2024 Jul 4. PMID:38962820<ref>PMID:38962820</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 8ixm" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Large Structures]]
[[Category: Pseudomonas aeruginosa]]
[[Category: Choudhury GB]]
[[Category: Datta S]]