5KNI

Crystal Structure of the wild-type SAM domain of human Tankyrase-1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.170 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Tankyrase Sterile alpha Motif Domain Polymerization Is Required for Its Role in Wnt Signaling.

Riccio, A.A.McCauley, M.Langelier, M.F.Pascal, J.M.

(2016) Structure 24: 1573-1581

  • DOI: 10.1016/j.str.2016.06.022
  • Primary Citation of Related Structures:  
    5KNI

  • PubMed Abstract: 
  • Tankyrase-1 (TNKS1/PARP-5a) is a poly(ADP-ribose) polymerase (PARP) enzyme that regulates multiple cellular processes creating a poly(ADP-ribose) posttranslational modification that can lead to target protein turnover. TNKS1 thereby controls protein levels of key components of signaling pathways, including Axin1, the limiting component of the destruction complex in canonical Wnt signaling that degrades β-catenin to prevent its coactivator function in gene expression ...

    Tankyrase-1 (TNKS1/PARP-5a) is a poly(ADP-ribose) polymerase (PARP) enzyme that regulates multiple cellular processes creating a poly(ADP-ribose) posttranslational modification that can lead to target protein turnover. TNKS1 thereby controls protein levels of key components of signaling pathways, including Axin1, the limiting component of the destruction complex in canonical Wnt signaling that degrades β-catenin to prevent its coactivator function in gene expression. There are limited molecular level insights into TNKS1 regulation in cell signaling pathways. TNKS1 has a sterile α motif (SAM) domain that is known to mediate polymerization, but the functional requirement for SAM polymerization has not been assessed. We have determined the crystal structure of wild-type human TNKS1 SAM domain and used structure-based mutagenesis to disrupt polymer formation and assess the consequences on TNKS1 regulation of β-catenin-dependent transcription. Our data indicate the SAM polymer is critical for TNKS1 catalytic activity and allows TNKS1 to efficiently access cytoplasmic signaling complexes.


    Organizational Affiliation

    Department of Biochemistry and Molecular Medicine, Université de Montréal, Montréal, Québec H3T 1J4, Canada. Electronic address: john.pascal@umontreal.ca.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Tankyrase-1
A, B, C, D, E, F, G
A, B, C, D, E, F, G
67Homo sapiensMutation(s): 0 
Gene Names: TNKSPARP5APARPLTIN1TINF1TNKS1
EC: 2.4.2.30 (PDB Primary Data), 2.4.2 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for O95271 (Homo sapiens)
Explore O95271 
Go to UniProtKB:  O95271
PHAROS:  O95271
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO95271
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.170 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 87.322α = 90
b = 55.101β = 115.88
c = 92.441γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XDSdata scaling
Cootmodel building

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM087282

Revision History  (Full details and data files)

  • Version 1.0: 2016-08-31
    Type: Initial release
  • Version 1.1: 2016-09-21
    Changes: Database references
  • Version 1.2: 2016-10-26
    Changes: Structure summary
  • Version 1.3: 2017-09-27
    Changes: Author supporting evidence, Derived calculations
  • Version 1.4: 2019-12-25
    Changes: Author supporting evidence