4O12

Structural and Biochemical Analyses of the Catalysis and Potency Impact of Inhibitor Phosphoribosylation by Human Nicotinamide Phosphoribosyltransferase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.498 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.209 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structural and biochemical analyses of the catalysis and potency impact of inhibitor phosphoribosylation by human nicotinamide phosphoribosyltransferase.

Oh, A.Ho, Y.C.Zak, M.Liu, Y.Chen, X.Yuen, P.W.Zheng, X.Liu, Y.Dragovich, P.S.Wang, W.

(2014) Chembiochem 15: 1121-1130

  • DOI: 10.1002/cbic.201402023
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Prolonged inhibition of nicotinamide phosphoribosyltransferase (NAMPT) is a strategy for targeting cancer metabolism. Many NAMPT inhibitors undergo NAMPT-catalyzed phosphoribosylation (pRib), a property often correlated with their cellular potency. T ...

    Prolonged inhibition of nicotinamide phosphoribosyltransferase (NAMPT) is a strategy for targeting cancer metabolism. Many NAMPT inhibitors undergo NAMPT-catalyzed phosphoribosylation (pRib), a property often correlated with their cellular potency. To understand this phenomenon and facilitate drug design, we analyzed a potent cellularly active NAMPT inhibitor (GNE-617). A crystal structure of pRib-GNE-617 in complex with NAMPT protein revealed a relaxed binding mode. Consistently, the adduct formation resulted in tight binding and strong product inhibition. In contrast, a biochemically equipotent isomer of GNE-617 (GNE-643) also formed pRib adducts but displayed significantly weaker cytotoxicity. Structural analysis revealed an altered ligand conformation of GNE-643, thus suggesting weak association of the adducts with NAMPT. Our data support a model for cellularly active NAMPT inhibitors that undergo NAMPT-catalyzed phosphoribosylation to produce pRib adducts that retain efficient binding to the enzyme.


    Organizational Affiliation

    Genentech, Inc., Department of Structural Biology, 1 DNA Way, South San Francisco, California 94080 (USA).




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Nicotinamide phosphoribosyltransferase
A, B
501Homo sapiensMutation(s): 0 
Gene Names: NAMPT (PBEF, PBEF1)
EC: 2.4.2.12
Find proteins for P43490 (Homo sapiens)
Go to Gene View: NAMPT
Go to UniProtKB:  P43490
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
A, B
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
2QG
Query on 2QG

Download SDF File 
Download CCD File 
A, B
2-[6-(4-chlorophenoxy)hexyl]-1-cyano-3-pyridin-4-ylguanidine
C19 H22 Cl N5 O
BOIPLTNGIAPDBY-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
2QGIC50: 2 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.498 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.209 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 60.570α = 90.00
b = 106.505β = 96.64
c = 83.174γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
SCALEPACKdata scaling
PHENIXrefinement
PHASERphasing
Blu-Icedata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2013-12-14 
  • Released Date: 2014-06-18 
  • Deposition Author(s): Oh, A., Wang, W.

Revision History 

  • Version 1.0: 2014-06-18
    Type: Initial release