1SG0

Crystal structure analysis of QR2 in complex with resveratrol


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.214 

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This is version 1.2 of the entry. See complete history


Literature

Crystal structure of quinone reductase 2 in complex with resveratrol

Buryanovskyy, L.Fu, Y.Boyd, M.Ma, Y.Hsieh, T.C.Wu, J.M.Zhang, Z.

(2004) Biochemistry 43: 11417-11426

  • DOI: 10.1021/bi049162o
  • Primary Citation of Related Structures:  
    1SG0

  • PubMed Abstract: 
  • Resveratrol has been shown to have chemopreventive, cardioprotective, and antiaging properties. Here, we report that resveratrol is a potent inhibitor of quinone reductase 2 (QR2) activity in vitro with a dissociation constant of 35 nM and show that it specifically binds to the deep active-site cleft of QR2 using high-resolution structural analysis ...

    Resveratrol has been shown to have chemopreventive, cardioprotective, and antiaging properties. Here, we report that resveratrol is a potent inhibitor of quinone reductase 2 (QR2) activity in vitro with a dissociation constant of 35 nM and show that it specifically binds to the deep active-site cleft of QR2 using high-resolution structural analysis. All three resveratrol hydroxyl groups form hydrogen bonds with amino acids from QR2, anchoring a flat resveratrol molecule in parallel with the isoalloxazine ring of FAD. The unique active-site pocket in QR2 could potentially bind other natural polyphenols such as flavonoids, as proven by the high affinity exhibited by quercetin toward QR2. K562 cells with QR2 expression suppressed by RNAi showed similar properties as resveratrol-treated cells in their resistance to quinone toxicity. Furthermore, the QR2 knockdown K562 cells exhibit increased antioxidant and detoxification enzyme expression and reduced proliferation rates. These observations could imply that the chemopreventive and cardioprotective properties of resveratrol are possibly the results of QR2 activity inhibition, which in turn, up-regulates the expression of cellular antioxidant enzymes and cellular resistance to oxidative stress.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, New York 10595, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
NRH dehydrogenase [quinone] 2A, B230Homo sapiensMutation(s): 0 
Gene Names: NQO2NMOR2BC006096
EC: 1.6.99.2 (PDB Primary Data), 1.10.5.1 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for P16083 (Homo sapiens)
Explore P16083 
Go to UniProtKB:  P16083
PHAROS:  P16083
Protein Feature View
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  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
STL BindingDB:  1SG0 Ki: 88 (nM) from 1 assay(s)
Kd: 54 (nM) from 1 assay(s)
IC50: min: 450, max: 6900 (nM) from 6 assay(s)
-TΔS: 20.93 (kJ/mol) from 1 assay(s)
ΔG: -4.10e+1 (kJ/mol) from 1 assay(s)
Binding MOAD:  1SG0 Kd: 35 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.214 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 83.33α = 90
b = 106.372β = 90
c = 56.982γ = 90
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-01-25
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance