Crystal Structure of Murine NMPRTase

Experimental Data Snapshot

  • Resolution: 2.10 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.228 

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Molecular basis for the inhibition of human NMPRTase, a novel target for anticancer agents.

Khan, J.A.Tao, X.Tong, L.

(2006) Nat Struct Mol Biol 13: 582-588

  • DOI: https://doi.org/10.1038/nsmb1105
  • Primary Citation of Related Structures:  
    2GVG, 2GVJ, 2GVL

  • PubMed Abstract: 

    Nicotinamide phosphoribosyltransferase (NMPRTase) has a crucial role in the salvage pathway of NAD+ biosynthesis, and a potent inhibitor of NMPRTase, FK866, can reduce cellular NAD+ levels and induce apoptosis in tumors. We have determined the crystal structures at up to 2.1-A resolution of human and murine NMPRTase, alone and in complex with the reaction product nicotinamide mononucleotide or the inhibitor FK866. The structures suggest that Asp219 is a determinant of substrate specificity of NMPRTase, which is confirmed by our mutagenesis studies. FK866 is bound in a tunnel at the interface of the NMPRTase dimer, and mutations in this binding site can abolish the inhibition by FK866. Contrary to current knowledge, the structures show that FK866 should compete directly with the nicotinamide substrate. Our structural and biochemical studies provide a starting point for the development of new anticancer agents.

  • Organizational Affiliation

    Department of Biological Sciences, Columbia University, New York, New York 10027, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Nicotinamide phosphoribosyltransferase
A, B
491Mus musculusMutation(s): 1 
Gene Names: Nampt
UniProt & NIH Common Fund Data Resources
Find proteins for Q99KQ4 (Mus musculus)
Explore Q99KQ4 
Go to UniProtKB:  Q99KQ4
IMPC:  MGI:1929865
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ99KQ4
Sequence Annotations
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
Query on MSE
A, B
Experimental Data & Validation

Experimental Data

  • Resolution: 2.10 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.228 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 60.263α = 90
b = 107.736β = 96.57
c = 83.287γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-07-25
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance