6URQ

Complex structure of human poly-ADP-ribosyltransferase TNKS1 ARC2-ARC3 and P antigen family member 4 (PAGE4)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.206 

wwPDB Validation   3D Report Full Report

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This is version 1.2 of the entry. See complete history


Literature

Tissue-Specific Regulation of the Wnt/ beta-Catenin Pathway by PAGE4 Inhibition of Tankyrase.

Koirala, S.Klein, J.Zheng, Y.Glenn, N.O.Eisemann, T.Fon Tacer, K.Miller, D.J.Kulak, O.Lu, M.Finkelstein, D.B.Neale, G.Tillman, H.Vogel, P.Strand, D.W.Lum, L.Brautigam, C.A.Pascal, J.M.Clements, W.K.Potts, P.R.

(2020) Cell Rep 32: 107922-107922

  • DOI: https://doi.org/10.1016/j.celrep.2020.107922
  • Primary Citation of Related Structures:  
    6URQ

  • PubMed Abstract: 

    Spatiotemporal control of Wnt/β-catenin signaling is critical for organism development and homeostasis. The poly-(ADP)-ribose polymerase Tankyrase (TNKS1) promotes Wnt/β-catenin signaling through PARylation-mediated degradation of AXIN1, a component of the β-catenin destruction complex. Although Wnt/β-catenin is a niche-restricted signaling program, tissue-specific factors that regulate TNKS1 are not known. Here, we report prostate-associated gene 4 (PAGE4) as a tissue-specific TNKS1 inhibitor that robustly represses canonical Wnt/β-catenin signaling in human cells, zebrafish, and mice. Structural and biochemical studies reveal that PAGE4 acts as an optimal substrate decoy that potently hijacks substrate binding sites on TNKS1 to prevent AXIN1 PARylation and degradation. Consistently, transgenic expression of PAGE4 in mice phenocopies TNKS1 knockout. Physiologically, PAGE4 is selectively expressed in stromal prostate fibroblasts and functions to establish a proper Wnt/β-catenin signaling niche through suppression of autocrine signaling. Our findings reveal a non-canonical mechanism for TNKS1 inhibition that functions to establish tissue-specific control of the Wnt/β-catenin pathway.


  • Organizational Affiliation

    Department of Cell and Molecular Biology, St. Jude Children's Research Hospital, Memphis, TN, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Poly [ADP-ribose] polymerase tankyrase-1
A, B
319Homo sapiensMutation(s): 0 
Gene Names: TNKSPARP5APARPLTIN1TINF1TNKS1
EC: 2.4.2.30 (PDB Primary Data), 2.4.2 (PDB Primary Data)
UniProt & NIH Common Fund Data Resources
Find proteins for O95271 (Homo sapiens)
Explore O95271 
Go to UniProtKB:  O95271
PHAROS:  O95271
GTEx:  ENSG00000173273 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO95271
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
P antigen family member 4
C, D
102Homo sapiensMutation(s): 0 
Gene Names: PAGE4GAGEC1JM27
UniProt & NIH Common Fund Data Resources
Find proteins for O60829 (Homo sapiens)
Explore O60829 
Go to UniProtKB:  O60829
PHAROS:  O60829
GTEx:  ENSG00000101951 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO60829
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.206 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 134.908α = 90
b = 101.035β = 107.232
c = 75.418γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
PHASERphasing
XDSdata reduction
Aimlessdata scaling

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Cancer Prevention and Research Institute of Texas (CPRIT)United StatesRP140661

Revision History  (Full details and data files)

  • Version 1.0: 2020-07-29
    Type: Initial release
  • Version 1.1: 2020-08-05
    Changes: Database references
  • Version 1.2: 2023-10-11
    Changes: Data collection, Database references, Refinement description