4DVI

Crystal structure of Tankyrase 1 with IWR2

• PDB DOI: https://doi.org/10.2210/pdb4DVI/pdb

• Classification: TRANSFERASE/TRANSFERASE INHIBITOR
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2012-02-23 Released: 2012-04-04 
• Deposition Author(s): Huang, X.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.258 
• R-Value Work: 0.248 

Literature

Novel binding mode of a potent and selective tankyrase inhibitor.

Gunaydin, H., Gu, Y., Huang, X.

(2012) PLoS One 7: e33740-e33740

• PubMed: 22438990 
• DOI: https://doi.org/10.1371/journal.pone.0033740
• Primary Citation of Related Structures:  
  4DVI


• PubMed Abstract: 
  

  Tankyrases (TNKS1 and TNKS2) are key regulators of cellular processes such as telomere pathway and Wnt signaling. IWRs (inhibitors of Wnt response) have recently been identified as potent and selective inhibitors of tankyrases. However, it is not clear how these IWRs interact with tankyrases. Here we report the crystal structure of the catalytic domain of human TNKS1 in complex with IWR2, which reveals a novel binding site for tankyrase inhibitors. The TNKS1/IWR2 complex provides a molecular basis for their strong and specific interactions and suggests clues for further development of tankyrase inhibitors.

---

Organizational Affiliation: 

Department of Molecular Structure, Amgen, Cambridge, Massachusetts, United States of America.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 51.06 kDa 
• Atom Count: 3,644 
• Modelled Residue Count: 406 
• Deposited Residue Count: 434 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Tankyrase-1	A, B	217	Homo sapiens	Mutation(s): 0  Gene Names: TNKS, PARP5A, PARPL, TIN1, TINF1, TNKS1 EC: 2.4.2.30
UniProt & NIH Common Fund Data Resources
Find proteins for O95271 (Homo sapiens) Explore O95271  Go to UniProtKB:  O95271
PHAROS:  O95271 GTEx:  ENSG00000173273

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
2IW	D [auth A], F [auth B]	4-[(3aR,4S,7R,7aS)-1,3-dioxo-1,3,3a,4,7,7a-hexahydro-2H-4,7-methanoisoindol-2-yl]-N-(4-methylquinolin-8-yl)benzamide C26 H21 N3 O3 BLPUCTSDPCUHQQ-NEAWWFDSSA-N
ZN	C [auth A], E [auth B]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
2IW	PDBBind:  4DVI	IC50: 192 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.258 
• R-Value Work: 0.248 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 41.47	α = 90
b = 77.94	β = 90
c = 146.54	γ = 90

Software Package:

Software Name	Purpose
HKL-2000	data collection
AMoRE	phasing
CNS	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2012-04-04 
Deposition Author(s): Huang, X.

Revision History  

• Version 1.0: 2012-04-04
  Type: Initial release
  
• Version 1.1: 2024-02-28
  Changes: Data collection, Database references, Derived calculations