3MPH

The structure of human diamine oxidase complexed with an inhibitor aminoguanidine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.177 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Correlation of active site metal content in human diamine oxidase with trihydroxyphenylalanine quinone cofactor biogenesis

McGrath, A.P.Caradoc-Davies, T.Collyer, C.A.Guss, J.M.

(2010) Biochemistry 49: 8316-8324

  • DOI: 10.1021/bi1010915

  • PubMed Abstract: 
  • Copper-containing amine oxidases (CAOs) require a protein-derived topaquinone cofactor (TPQ) for activity. TPQ biogenesis is a self-processing reaction requiring the presence of copper and molecular oxygen. Recombinant human diamine oxidase (hDAO) wa ...

    Copper-containing amine oxidases (CAOs) require a protein-derived topaquinone cofactor (TPQ) for activity. TPQ biogenesis is a self-processing reaction requiring the presence of copper and molecular oxygen. Recombinant human diamine oxidase (hDAO) was heterologously expressed in Drosophila S2 cells, and analysis indicates that the purified hDAO contains substoichiometric amounts of copper and TPQ. The crystal structure of a complex of an inhibitor, aminoguanidine, and hDAO at 2.05 Å resolution shows that the aminoguanidine forms a covalent adduct with the TPQ and that the site is ∼75% occupied. Aminoguanidine is a potent inhibitor of hDAO with an IC(50) of 153 ± 9 nM. The structure indicates that the catalytic metal site, normally occupied by copper, is fully occupied. X-ray diffraction data recorded below the copper edge, between the copper and zinc edges, and above the zinc edge have been used to show that the metal site is occupied approximately 75% by copper and 25% by zinc and the formation of the TPQ cofactor is correlated with copper occupancy.


    Organizational Affiliation

    School of Molecular Bioscience, University of Sydney, Sydney, NSW 2006, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Amiloride-sensitive amine oxidase
A, B
731Homo sapiensMutation(s): 1 
Gene Names: AOC1 (ABP1, DAO1)
EC: 1.4.3.22
Find proteins for P19801 (Homo sapiens)
Go to Gene View: AOC1
Go to UniProtKB:  P19801
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A, B
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
BMA
Query on BMA

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Download CCD File 
A
BETA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-RWOPYEJCSA-N
 Ligand Interaction
CU
Query on CU

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Download CCD File 
A, B
COPPER (II) ION
Cu
JPVYNHNXODAKFH-UHFFFAOYSA-N
 Ligand Interaction
NAG
Query on NAG

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Download CCD File 
A, B
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
AGQ
Query on AGQ
A, B
L-peptide linkingC10 H13 N5 O4TYR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.177 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 92.685α = 90.00
b = 94.604β = 90.00
c = 196.051γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
REFMACrefinement
MOSFLMdata reduction
PDB_EXTRACTdata extraction
REFMACphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-09-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2012-04-18
    Type: Derived calculations
  • Version 1.3: 2014-03-05
    Type: Database references