3HII

Crystal structure of human diamine oxidase in complex with the inhibitor pentamidine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.184 

wwPDB Validation 3D Report Full Report



Literature

Structure and inhibition of human diamine oxidase

McGrath, A.P.Hilmer, K.M.Collyer, C.A.Shepard, E.M.Elmore, B.O.Brown, D.E.Dooley, D.M.Guss, J.M.

(2009) Biochemistry 48: 9810-9822

  • DOI: 10.1021/bi9014192
  • Primary Citation of Related Structures:  
    3HIG, 3HII, 3HI7

  • PubMed Abstract: 
  • Humans have three functioning genes that encode copper-containing amine oxidases. The product of the AOC1 gene is a so-called diamine oxidase (hDAO), named for its substrate preference for diamines, particularly histamine. hDAO has been cloned and ex ...

    Humans have three functioning genes that encode copper-containing amine oxidases. The product of the AOC1 gene is a so-called diamine oxidase (hDAO), named for its substrate preference for diamines, particularly histamine. hDAO has been cloned and expressed in insect cells and the structure of the native enzyme determined by X-ray crystallography to a resolution of 1.8 A. The homodimeric structure has the archetypal amine oxidase fold. Two active sites, one in each subunit, are characterized by the presence of a copper ion and a topaquinone residue formed by the post-translational modification of a tyrosine. Although hDAO shares 37.9% sequence identity with another human copper amine oxidase, semicarbazide sensitive amine oxidase or vascular adhesion protein-1, its substrate binding pocket and entry channel are distinctly different in accord with the different substrate specificities. The structures of two inhibitor complexes of hDAO, berenil and pentamidine, have been refined to resolutions of 2.1 and 2.2 A, respectively. They bind noncovalently in the active-site channel. The inhibitor binding suggests that an aspartic acid residue, conserved in all diamine oxidases but absent from other amine oxidases, is responsible for the diamine specificity by interacting with the second amino group of preferred diamine substrates.


    Organizational Affiliation

    School of Molecular and Microbial Biosciences, University of Sydney, Sydney, NSW 2006, Australia.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Amiloride-sensitive amine oxidaseAB731Homo sapiensMutation(s): 1 
Gene Names: ABP1AOC1DAO1
EC: 1.4.3.22
Find proteins for P19801 (Homo sapiens)
Explore P19801 
Go to UniProtKB:  P19801
NIH Common Fund Data Resources
PHAROS  P19801
Protein Feature View
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  • Reference Sequence
Oligosaccharides

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Entity ID: 2
MoleculeChainsChain Length2D Diagram Glycosylation
beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
C
3 N-Glycosylation
Entity ID: 3
MoleculeChainsChain Length2D Diagram Glycosylation
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
D, E, F, G, H
2 N-Glycosylation
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PNT
Query on PNT

Download CCD File 
A, B
1,5-BIS(4-AMIDINOPHENOXY)PENTANE
C19 H24 N4 O2
XDRYMKDFEDOLFX-UHFFFAOYSA-N
 Ligand Interaction
GOL
Query on GOL

Download CCD File 
A
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
CU
Query on CU

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

Download CCD File 
A, B
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
TPQ
Query on TPQ
A,BL-PEPTIDE LINKINGC9 H9 N O5TYR
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
PNTKi:  290   nM  BindingDB
PNTKi :  290   nM  PDBBind
PNTKi:  290   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.184 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.455α = 90
b = 94.69β = 90
c = 196.279γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
Blu-Icedata collection
HKL-2000data reduction
HKL-2000data scaling
REFMACphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-10-20
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Derived calculations, Non-polymer description, Version format compliance
  • Version 1.2: 2017-11-01
    Changes: Refinement description
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary