4OA7

Crystal structure of Tankyrase1 in complex with IWR1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.301 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.225 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Disruption of Wnt/ beta-Catenin Signaling and Telomeric Shortening Are Inextricable Consequences of Tankyrase Inhibition in Human Cells.

Kulak, O.Chen, H.Holohan, B.Wu, X.He, H.Borek, D.Otwinowski, Z.Yamaguchi, K.Garofalo, L.A.Ma, Z.Wright, W.Chen, C.Shay, J.W.Zhang, X.Lum, L.

(2015) Mol.Cell.Biol. 35: 2425-2435

  • DOI: 10.1128/MCB.00392-15
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Maintenance of chromosomal ends (telomeres) directly contributes to cancer cell immortalization. The telomere protection enzymes belonging to the tankyrase (Tnks) subfamily of poly(ADP-ribose) polymerases (PARPs) have recently been shown to also cont ...

    Maintenance of chromosomal ends (telomeres) directly contributes to cancer cell immortalization. The telomere protection enzymes belonging to the tankyrase (Tnks) subfamily of poly(ADP-ribose) polymerases (PARPs) have recently been shown to also control transcriptional response to secreted Wnt signaling molecules. Whereas Tnks inhibitors are currently being developed as therapeutic agents for targeting Wnt-related cancers and as modulators of Wnt signaling in tissue-engineering agendas, their impact on telomere length maintenance remains unclear. Here, we leveraged a collection of Wnt pathway inhibitors with previously unassigned mechanisms of action to identify novel pharmacophores supporting Tnks inhibition. A multifaceted experimental approach that included structural, biochemical, and cell biological analyses revealed two distinct chemotypes with selectivity for Tnks enzymes. Using these reagents, we revealed that Tnks inhibition rapidly induces DNA damage at telomeres and telomeric shortening upon long-term chemical exposure in cultured cells. On the other hand, inhibitors of the Wnt acyltransferase Porcupine (Porcn) elicited neither effect. Thus, Tnks inhibitors impact telomere length maintenance independently of their affects on Wnt/β-catenin signaling. We discuss the implications of these findings for anticancer and regenerative medicine agendas dependent upon chemical inhibitors of Wnt/β-catenin signaling.


    Organizational Affiliation

    Department of Cell Biology, University of Texas Southwestern Medical Center, Dallas, Texas, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tankyrase-1
A, B, C, D
215Homo sapiensMutation(s): 0 
Gene Names: TNKS (PARP5A, PARPL, TIN1, TINF1, TNKS1)
EC: 2.4.2.30
Find proteins for O95271 (Homo sapiens)
Go to Gene View: TNKS
Go to UniProtKB:  O95271
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B, C, D
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
2XS
Query on 2XS

Download SDF File 
Download CCD File 
A, B, C, D
4-[(3aR,4R,7S,7aS)-1,3-dioxo-1,3,3a,4,7,7a-hexahydro-2H-4,7-methanoisoindol-2-yl]-N-(quinolin-8-yl)benzamide
C25 H19 N3 O3
ZGSXEXBYLJIOGF-BTYSMDAFSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.301 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.225 
  • Space Group: P 62
Unit Cell:
Length (Å)Angle (°)
a = 107.936α = 90.00
b = 107.936β = 90.00
c = 121.921γ = 120.00
Software Package:
Software NamePurpose
CCP4phasing
HKL-3000data reduction
HKL-3000data scaling
HKL-3000data collection
CCP4model building
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2014-01-03 
  • Released Date: 2015-01-07 
  • Deposition Author(s): Zhang, X., He, H.

Revision History 

  • Version 1.0: 2015-01-07
    Type: Initial release
  • Version 1.1: 2015-05-20
    Type: Database references
  • Version 1.2: 2015-07-15
    Type: Database references
  • Version 1.3: 2017-11-22
    Type: Refinement description