3HOK

X-ray Crystal Structure of Human Heme Oxygenase-1 with (2R, 4S)-2-[2-(4-Chlorophenyl)ethyl]-2-[(1H-imidazol-1-yl)methyl]-4[((5-trifluoromethylpyridin-2-yl)thio)methyl]-1,3-dioxolane: A Novel, Inducible Binding Mode


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.19 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.226 

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Ligand Structure Quality Assessment 


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Literature

X-ray crystal structure of human heme oxygenase-1 with (2R,4S)-2-[2-(4-chlorophenyl)ethyl]-2-[(1H-imidazol-1-yl)methyl]-4[((5-trifluoromethylpyridin-2-yl)thio)methyl]-1,3-dioxolane: a novel, inducible binding mode.

Rahman, M.N.Vlahakis, J.Z.Vukomanovic, D.Szarek, W.A.Nakatsu, K.Jia, Z.

(2009) J Med Chem 52: 4946-4950

  • DOI: 10.1021/jm900434f
  • Primary Citation of Related Structures:  
    3HOK

  • PubMed Abstract: 
  • The crystal structure of human heme oxygenase-1 (HO-1) in complex with (2R,4S)-2-[2-(4-chlorophenyl)ethyl]-2-[(1H-imidazol-1-yl)methyl]-4[((5-trifluoromethylpyridin-2-yl)thio)methyl]-1,3-dioxolane (4) reveals a novel, inducible binding mode. Inhibitor 4 coordinates the heme iron, with its chlorophenyl group bound in a distal hydrophobic pocket, as seen in previous structures ...

    The crystal structure of human heme oxygenase-1 (HO-1) in complex with (2R,4S)-2-[2-(4-chlorophenyl)ethyl]-2-[(1H-imidazol-1-yl)methyl]-4[((5-trifluoromethylpyridin-2-yl)thio)methyl]-1,3-dioxolane (4) reveals a novel, inducible binding mode. Inhibitor 4 coordinates the heme iron, with its chlorophenyl group bound in a distal hydrophobic pocket, as seen in previous structures. However, accommodation of the 5-trifluoromethylpyridin-2-yl group requires a significant shift in the proximal helix, inducing the formation of a hydrophobic pocket. This is the first example of an induced binding pocket observed in HO-1.


    Organizational Affiliation

    Department of Biochemistry, Queen's University, Kingston, ON K7L 3N6, Canada.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Heme oxygenase 1A, B233Homo sapiensMutation(s): 0 
Gene Names: HMOX1HOHO1
EC: 1.14.99.3 (PDB Primary Data), 1.14.14.18 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for P09601 (Homo sapiens)
Explore P09601 
Go to UniProtKB:  P09601
PHAROS:  P09601
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP09601
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download Ideal Coordinates CCD File 
C [auth A],
D [auth B]
PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
Q80
Query on Q80

Download Ideal Coordinates CCD File 
E [auth B]2-({[(2R,4S)-2-[2-(4-chlorophenyl)ethyl]-2-(1H-imidazol-1-ylmethyl)-1,3-dioxolan-4-yl]methyl}sulfanyl)-5-(trifluoromethyl)pyridine
C22 H21 Cl F3 N3 O2 S
QJIXKBNNYAEGKH-PZJWPPBQSA-N
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
Q80 Binding MOAD:  3HOK IC50: 2100 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.19 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.226 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.072α = 90
b = 54.592β = 94.641
c = 71.884γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Ligand Structure Quality Assessment 



Entry History 

Deposition Data

  • Deposited Date: 2009-06-02 
  • Released Date: 2009-07-28 
  • Deposition Author(s): Rahman, M.N., Jia, Z.

Revision History  (Full details and data files)

  • Version 1.0: 2009-07-28
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance