4UHX

Human aldehyde oxidase in complex with phthalazine and thioridazine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.195 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Insights Into Xenobiotic and Inhibitor Binding to Human Aldehyde Oxidase

Coelho, C.Foti, A.Hartmann, T.Santos-Silva, T.Leimkuhler, S.Romao, M.J.

(2015) Nat.Chem.Biol. 11: 779

  • DOI: 10.1038/nchembio.1895
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Aldehyde oxidase (AOX) is a xanthine oxidase (XO)-related enzyme with emerging importance due to its role in the metabolism of drugs and xenobiotics. We report the first crystal structures of human AOX1, substrate free (2.6-Å resolution) and in compl ...

    Aldehyde oxidase (AOX) is a xanthine oxidase (XO)-related enzyme with emerging importance due to its role in the metabolism of drugs and xenobiotics. We report the first crystal structures of human AOX1, substrate free (2.6-Å resolution) and in complex with the substrate phthalazine and the inhibitor thioridazine (2.7-Å resolution). Analysis of the protein active site combined with steady-state kinetic studies highlight the unique features, including binding and substrate orientation at the active site, that characterize human AOX1 as an important drug-metabolizing enzyme. Structural analysis of the complex with the noncompetitive inhibitor thioridazine revealed a new, unexpected and fully occupied inhibitor-binding site that is structurally conserved among mammalian AOXs and XO. The new structural insights into the catalytic and inhibition mechanisms of human AOX that we now report will be of great value for the rational analysis of clinical drug interactions involving inhibition of AOX1 and for the prediction and design of AOX-stable putative drugs.


    Organizational Affiliation

    Research Unit on Applied Molecular Biosciences-Rede de Química e Tecnologia (UCIBIO-REQUIMTE), Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ALDEHYDE OXIDASE
A
1338Homo sapiensMutation(s): 0 
Gene Names: AOX1 (AO)
EC: 1.2.3.1
Find proteins for Q06278 (Homo sapiens)
Go to Gene View: AOX1
Go to UniProtKB:  Q06278
Small Molecules
Ligands 8 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
RTZ
Query on RTZ

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A
10-{2-[(2R)-1-methylpiperidin-2-yl]ethyl}-2-(methylsulfanyl)-10H-phenothiazine
C21 H26 N2 S2
KLBQZWRITKRQQV-MRXNPFEDSA-N
 Ligand Interaction
MLI
Query on MLI

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A
MALONATE ION
C3 H2 O4
OFOBLEOULBTSOW-UHFFFAOYSA-L
 Ligand Interaction
FAD
Query on FAD

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A
FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
 Ligand Interaction
MTE
Query on MTE

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A
PHOSPHONIC ACIDMONO-(2-AMINO-5,6-DIMERCAPTO-4-OXO-3,7,8A,9,10,10A-HEXAHYDRO-4H-8-OXA-1,3,9,10-TETRAAZA-ANTHRACEN-7-YLMETHYL)ESTER
C10 H14 N5 O6 P S2
HPEUEJRPDGMIMY-IFQPEPLCSA-N
 Ligand Interaction
FES
Query on FES

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A
FE2/S2 (INORGANIC) CLUSTER
Fe2 S2
NIXDOXVAJZFRNF-UHFFFAOYSA-N
 Ligand Interaction
MOS
Query on MOS

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A
DIOXOTHIOMOLYBDENUM(VI) ION
H Mo O2 S
BDSRWPHSAKXXRG-UHFFFAOYSA-M
 Ligand Interaction
LZU
Query on LZU

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A
10-{2-[(2S)-1-methylpiperidin-2-yl]ethyl}-2-(methylsulfanyl)-10H-phenothiazine
Thioridazine
C21 H26 N2 S2
KLBQZWRITKRQQV-INIZCTEOSA-N
 Ligand Interaction
4FT
Query on 4FT

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A
phthalazine
C8 H6 N2
LFSXCDWNBUNEEM-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.195 
  • Space Group: P 42 21 2
Unit Cell:
Length (Å)Angle (°)
a = 148.732α = 90.00
b = 148.732β = 90.00
c = 132.808γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
XDSdata scaling
XDSdata reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-09-02
    Type: Initial release
  • Version 1.1: 2015-09-09
    Type: Database references
  • Version 1.2: 2015-09-30
    Type: Database references