View source for 5nab


==Pseudomonas fluorescens kynurenine 3-monooxygenase (KMO) in complex with 3-(5-chloro-6-methyl-2-oxo-2,3-dihydro-1,3-benzoxazol-3-yl)propanoic acid==
<StructureSection load='5nab' size='340' side='right'caption='[[5nab]], [[Resolution|resolution]] 1.63&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5nab]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Pseudomonas_fluorescens Pseudomonas fluorescens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5NAB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5NAB 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]] 1.63&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=8RK:3-(5-chloranyl-6-methyl-2-oxidanylidene-1,3-benzoxazol-3-yl)propanoic+acid'>8RK</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=FAD:FLAVIN-ADENINE+DINUCLEOTIDE'>FAD</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</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=5nab FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5nab OCA], [https://pdbe.org/5nab PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5nab RCSB], [https://www.ebi.ac.uk/pdbsum/5nab PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5nab ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/KMO_PSEFL KMO_PSEFL] Catalyzes the hydroxylation of L-kynurenine (L-Kyn) to form 3-hydroxy-L-kynurenine (L-3OHKyn). Probably required for the synthesis of quinolinic acid and the siderophore quinolobactin.
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== Publication Abstract from PubMed ==
Kynurenine-3-monooxygenase (KMO) is a key FAD-dependent enzyme of tryptophan metabolism. In animal models, KMO inhibition has shown benefit in neurodegenerative diseases such as Huntington's and Alzheimer's. Most recently it has been identified as a target for acute pancreatitis multiple organ dysfunction syndrome (AP-MODS); a devastating inflammatory condition with a mortality rate in excess of 20%. Here we report and dissect the molecular mechanism of action of three classes of KMO inhibitors with differentiated binding modes and kinetics. Two novel inhibitor classes trap the catalytic flavin in a previously unobserved tilting conformation. This correlates with picomolar affinities, increased residence times and an absence of the peroxide production seen with previous substrate site inhibitors. These structural and mechanistic insights culminated in GSK065(C1) and GSK366(C2), molecules suitable for preclinical evaluation. Moreover, revising the repertoire of flavin dynamics in this enzyme class offers exciting new opportunities for inhibitor design.

Structural and mechanistic basis of differentiated inhibitors of the acute pancreatitis target kynurenine-3-monooxygenase.,Hutchinson JP, Rowland P, Taylor MRD, Christodoulou EM, Haslam C, Hobbs CI, Holmes DS, Homes P, Liddle J, Mole DJ, Uings I, Walker AL, Webster SP, Mowat CG, Chung CW Nat Commun. 2017 Jun 12;8:15827. doi: 10.1038/ncomms15827. PMID:28604669<ref>PMID:28604669</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 5nab" style="background-color:#fffaf0;"></div>

==See Also==
*[[Monooxygenase 3D structures|Monooxygenase 3D structures]]
== References ==
<references/>
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</StructureSection>
[[Category: Large Structures]]
[[Category: Pseudomonas fluorescens]]
[[Category: Rowland P]]