3UA9

Crystal structure of human tankyrase 2 in complex with a selective inhibitor

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.207 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

Structural basis of selective inhibition of human tankyrases.

Narwal, M., Venkannagari, H., Lehtio, L.

(2012) J Med Chem 55: 1360-1367

  • DOI: 10.1021/jm201510p
  • Primary Citation of Related Structures:  
    3U9H, 3U9Y, 3UA9

  • PubMed Abstract: 

    • Tankyrases are poly(ADP-ribose) polymerases that have many cellular functions. They play pharmaceutically important roles, at least in telomere homeostasis and Wnt signaling, by covalently ADP-ribosylating target proteins and consequently regulating thei ...

    Tankyrases are poly(ADP-ribose) polymerases that have many cellular functions. They play pharmaceutically important roles, at least in telomere homeostasis and Wnt signaling, by covalently ADP-ribosylating target proteins and consequently regulating their functions. These features make tankyrases potential targets for treatment of cancer. We report here crystal structures of human tankyrase 2 catalytic fragment in complex with a byproduct, nicotinamide, and with selective inhibitors of tankyrases (IWR-1) and PARPs 1 and 2 (olaparib). Binding of these inhibitors to tankyrase 2 induces specific conformational changes. The crystal structures explain the selectivity of the inhibitors, reveal the flexibility of a substrate binding loop, and explain existing structure-activity relationship data. The first crystal structure of a PARP enzyme in complex with a potent inhibitor, IWR-1, that does not bind to the widely utilized nicotinamide-binding site makes the structure valuable for development of PARP inhibitors in general.

    Organizational Affiliation: 

    Pharmaceutical Sciences, Department of Biosciences, Abo Akademi University, FI-20520 Turku, Finland.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Tankyrase-2 A, B240Homo sapiensMutation(s): 0 
Gene Names: TNKS2, PARP5B, TANK2, TNKL
EC: 2.4.2.30 (PDB Primary Data), 2.4.2 (UniProt)
Find proteins for Q9H2K2 (Homo sapiens)
Explore Q9H2K2 
Go to UniProtKB:  Q9H2K2
NIH Common Fund Data Resources
PHAROS:  Q9H2K2
GTEx:  ENSG00000107854
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
IWRIC50:  56   nM  BindingDB
IWRIC50 :  56   nM  PDBBind
IWRIC50:  135   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.207 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.82α = 90
b = 93.77β = 90
c = 121.83γ = 90
Software Package:
Software NamePurpose
MxCuBEdata collection
MOLREPphasing
REFMACrefinement
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report


View more in-depth experimental data

Entry History 

Deposition Data

  • Deposited Date: 2011-10-21 
  • Released Date: 2012-01-25 
    • Deposition Author(s): Narwal, M., Lehtio, L.

Revision History 

  • Version 1.0: 2012-01-25
    Type: Initial release
  • Version 1.1: 2012-02-22
    Changes: Database references