4QPL

Crystal structure of RNF146(RING-WWE)/UbcH5a/iso-ADPr complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.186 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Allosteric activation of the RNF146 ubiquitin ligase by a poly(ADP-ribosyl)ation signal.

DaRosa, P.A.Wang, Z.Jiang, X.Pruneda, J.N.Cong, F.Klevit, R.E.Xu, W.

(2015) Nature 517: 223-226

  • DOI: 10.1038/nature13826

  • PubMed Abstract: 
  • Protein poly(ADP-ribosyl)ation (PARylation) has a role in diverse cellular processes such as DNA repair, transcription, Wnt signalling, and cell death. Recent studies have shown that PARylation can serve as a signal for the polyubiquitination and deg ...

    Protein poly(ADP-ribosyl)ation (PARylation) has a role in diverse cellular processes such as DNA repair, transcription, Wnt signalling, and cell death. Recent studies have shown that PARylation can serve as a signal for the polyubiquitination and degradation of several crucial regulatory proteins, including Axin and 3BP2 (refs 7, 8, 9). The RING-type E3 ubiquitin ligase RNF146 (also known as Iduna) is responsible for PARylation-dependent ubiquitination (PARdU). Here we provide a structural basis for RNF146-catalysed PARdU and how PARdU specificity is achieved. First, we show that iso-ADP-ribose (iso-ADPr), the smallest internal poly(ADP-ribose) (PAR) structural unit, binds between the WWE and RING domains of RNF146 and functions as an allosteric signal that switches the RING domain from a catalytically inactive state to an active one. In the absence of PAR, the RING domain is unable to bind and activate a ubiquitin-conjugating enzyme (E2) efficiently. Binding of PAR or iso-ADPr induces a major conformational change that creates a functional RING structure. Thus, RNF146 represents a new mechanistic class of RING E3 ligases, the activities of which are regulated by non-covalent ligand binding, and that may provide a template for designing inducible protein-degradation systems. Second, we find that RNF146 directly interacts with the PAR polymerase tankyrase (TNKS). Disruption of the RNF146-TNKS interaction inhibits turnover of the substrate Axin in cells. Thus, both substrate PARylation and PARdU are catalysed by enzymes within the same protein complex, and PARdU substrate specificity may be primarily determined by the substrate-TNKS interaction. We propose that the maintenance of unliganded RNF146 in an inactive state may serve to maintain the stability of the RNF146-TNKS complex, which in turn regulates the homeostasis of PARdU activity in the cell.


    Organizational Affiliation

    1] Department of Biochemistry, University of Washington, Seattle, Washington 98195, USA [2] Department of Biological Structure, University of Washington, Seattle, Washington 98195, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
E3 ubiquitin-protein ligase RNF146
A, C
155Mus musculusMutation(s): 0 
Gene Names: Rnf146
EC: 2.3.2.27
Find proteins for Q9CZW6 (Mus musculus)
Go to UniProtKB:  Q9CZW6
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Ubiquitin-conjugating enzyme E2 D1
B, D
154Homo sapiensMutation(s): 0 
Gene Names: UBE2D1 (SFT, UBC5A, UBCH5, UBCH5A)
EC: 2.3.2.23
Find proteins for P51668 (Homo sapiens)
Go to Gene View: UBE2D1
Go to UniProtKB:  P51668
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, C
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
V3L
Query on V3L

Download SDF File 
Download CCD File 
A, C
2'-O-(5-O-phosphono-alpha-D-ribofuranosyl)adenosine 5'-(dihydrogen phosphate)
C15 H23 N5 O14 P2
BHIWBSNWEZIHHL-KEOHHSTQSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
V3LKd: 372 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.186 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 133.665α = 90.00
b = 61.688β = 90.00
c = 94.346γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
SOLVEphasing
SCALEPACKdata scaling
HKL-2000data collection
DENZOdata reduction
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-10-15
    Type: Initial release
  • Version 1.1: 2014-11-05
    Type: Database references
  • Version 1.2: 2015-01-21
    Type: Database references
  • Version 1.3: 2017-11-22
    Type: Refinement description