Synthesis of Casimiroin and Optimization of Its Quinone Reductase 2 and Aromatase Inhibitory activity

Experimental Data Snapshot

  • Resolution: 1.98 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.190 

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Synthesis of casimiroin and optimization of its quinone reductase 2 and aromatase inhibitory activities.

Maiti, A.Reddy, P.V.Sturdy, M.Marler, L.Pegan, S.D.Mesecar, A.D.Pezzuto, J.M.Cushman, M.

(2009) J Med Chem 52: 1873-1884

  • DOI: https://doi.org/10.1021/jm801335z
  • Primary Citation of Related Structures:  
    3G5M, 3GAM

  • PubMed Abstract: 

    An efficient method has been developed to synthesize casimiroin (1), a component of the edible fruit of Casimiroa edulis, on a multigram scale in good overall yield. The route was versatile enough to provide an array of compound 1 analogues that were evaluated as QR2 and aromatase inhibitors. In addition, X-ray crystallography studies of QR2 in complex with compound 1 and one of its more potent analogues has provided insight into the mechanism of action of this new series of QR2 inhibitors. The initial biological investigations suggest that compound 1 and its analogues merit further investigation as potential chemopreventive or chemotherapeutic agents.

  • Organizational Affiliation

    Department of Medicinal Chemistry and Molecular Pharmacology, School of Pharmacy and Pharmaceutical Sciences, and the Purdue Cancer Center, Purdue University, West Lafayette, Indiana 47907, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Ribosyldihydronicotinamide dehydrogenase [quinone]
A, B
231Homo sapiensMutation(s): 0 
Gene Names: NQO2NMOR2
EC: (PDB Primary Data), (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for P16083 (Homo sapiens)
Explore P16083 
Go to UniProtKB:  P16083
PHAROS:  P16083
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP16083
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.98 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.190 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 56.346α = 90
b = 83.889β = 90
c = 106.696γ = 90
Software Package:
Software NamePurpose
SERGUIdata collection
CCP4model building
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-03-24
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance