5JU5

Crystal structure of the human Tankyrase 1 (TNKS) SAM domain (D1055R), crystal form 1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Tankyrase Requires SAM Domain-Dependent Polymerization to Support Wnt-beta-Catenin Signaling.

Mariotti, L.Templeton, C.M.Ranes, M.Paracuellos, P.Cronin, N.Beuron, F.Morris, E.Guettler, S.

(2016) Mol.Cell 63: 498-513

  • DOI: 10.1016/j.molcel.2016.06.019
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The poly(ADP-ribose) polymerase (PARP) Tankyrase (TNKS and TNKS2) is paramount to Wnt-β-catenin signaling and a promising therapeutic target in Wnt-dependent cancers. The pool of active β-catenin is normally limited by destruction complexes, whose as ...

    The poly(ADP-ribose) polymerase (PARP) Tankyrase (TNKS and TNKS2) is paramount to Wnt-β-catenin signaling and a promising therapeutic target in Wnt-dependent cancers. The pool of active β-catenin is normally limited by destruction complexes, whose assembly depends on the polymeric master scaffolding protein AXIN. Tankyrase, which poly(ADP-ribosyl)ates and thereby destabilizes AXIN, also can polymerize, but the relevance of these polymers has remained unclear. We report crystal structures of the polymerizing TNKS and TNKS2 sterile alpha motif (SAM) domains, revealing versatile head-to-tail interactions. Biochemical studies informed by these structures demonstrate that polymerization is required for Tankyrase to drive β-catenin-dependent transcription. We show that the polymeric state supports PARP activity and allows Tankyrase to effectively access destruction complexes through enabling avidity-dependent AXIN binding. This study provides an example for regulated signal transduction in non-membrane-enclosed compartments (signalosomes), and it points to novel potential strategies to inhibit Tankyrase function in oncogenic Wnt signaling.


    Organizational Affiliation

    Division of Structural Biology, The Institute of Cancer Research (ICR), London SW7 3RP, UK; Division of Cancer Biology, The Institute of Cancer Research (ICR), London SW7 3RP, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tankyrase-1
A, B, C, D, E, F
79Homo 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
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.191 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 52.237α = 90.00
b = 55.222β = 96.16
c = 83.046γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling
BUSTERrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-08-03
    Type: Initial release
  • Version 1.1: 2016-08-17
    Type: Source and taxonomy, Structure summary