5NAG

Pseudomonas fluorescens kynurenine 3-monooxygenase (KMO) in complex with 3-{5-chloro-6-[(1R)-1-(pyridin-2-yl)ethoxy]-1,2-benzoxazol-3-yl}propanoic acid


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.68 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.170 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history


Literature

Structural and mechanistic basis of differentiated inhibitors of the acute pancreatitis target kynurenine-3-monooxygenase.

Hutchinson, J.P.Rowland, P.Taylor, M.R.D.Christodoulou, E.M.Haslam, C.Hobbs, C.I.Holmes, D.S.Homes, P.Liddle, J.Mole, D.J.Uings, I.Walker, A.L.Webster, S.P.Mowat, C.G.Chung, C.W.

(2017) Nat Commun 8: 15827-15827

  • DOI: https://doi.org/10.1038/ncomms15827
  • Primary Citation of Related Structures:  
    5NA5, 5NAB, 5NAE, 5NAG, 5NAH, 5NAK

  • PubMed Abstract: 

    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.


  • Organizational Affiliation

    Platform Technologies and Science, GlaxoSmithKline, Stevenage SG1 2NY, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Kynurenine 3-monooxygenase
A, B
461Pseudomonas fluorescensMutation(s): 2 
Gene Names: kmoqbsG
EC: 1.14.13.9
UniProt
Find proteins for Q84HF5 (Pseudomonas fluorescens)
Explore Q84HF5 
Go to UniProtKB:  Q84HF5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ84HF5
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.68 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.170 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 69.672α = 90
b = 52.953β = 103.6
c = 135.542γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
Aimlessdata scaling
BUSTERphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History 

Deposition Data

  • Released Date: 2017-06-21 
  • Deposition Author(s): Rowland, P.

Revision History  (Full details and data files)

  • Version 1.0: 2017-06-21
    Type: Initial release
  • Version 1.1: 2024-05-08
    Changes: Data collection, Database references