RING-DTC domains of Deltex 2, Form 2

Experimental Data Snapshot

  • Resolution: 1.77 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.244 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


DELTEX2 C-terminal domain recognizes and recruits ADP-ribosylated proteins for ubiquitination.

Ahmed, S.F.Buetow, L.Gabrielsen, M.Lilla, S.Chatrin, C.Sibbet, G.J.Zanivan, S.Huang, D.T.

(2020) Sci Adv 6

  • DOI: https://doi.org/10.1126/sciadv.abc0629
  • Primary Citation of Related Structures:  
    6Y22, 6Y2X, 6Y3J

  • PubMed Abstract: 

    Cross-talk between ubiquitination and ADP-ribosylation regulates spatiotemporal recruitment of key players in many signaling pathways. The DELTEX family ubiquitin ligases (DTX1 to DTX4 and DTX3L) are characterized by a RING domain followed by a C-terminal domain (DTC) of hitherto unknown function. Here, we use two label-free mass spectrometry techniques to investigate the interactome and ubiquitinated substrates of human DTX2 and identify a large proportion of proteins associated with the DNA damage repair pathway. We show that DTX2-catalyzed ubiquitination of these interacting proteins requires PARP1/2-mediated ADP-ribosylation and depends on the DTC domain. Using a combination of structural, biochemical, and cell-based techniques, we show that the DTX2 DTC domain harbors an ADP-ribose-binding pocket and recruits poly-ADP-ribose (PAR)-modified proteins for ubiquitination. This PAR-binding property of DTC domain is conserved across the DELTEX family E3s. These findings uncover a new ADP-ribose-binding domain that facilitates PAR-dependent ubiquitination.

  • Organizational Affiliation

    Cancer Research UK Beatson Institute, Garscube Estate, Switchback Road, Glasgow G61 1BD, UK.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Probable E3 ubiquitin-protein ligase DTX2
A, B
235Homo sapiensMutation(s): 0 
Gene Names: DTX2KIAA1528RNF58
UniProt & NIH Common Fund Data Resources
Find proteins for Q86UW9 (Homo sapiens)
Explore Q86UW9 
Go to UniProtKB:  Q86UW9
GTEx:  ENSG00000091073 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ86UW9
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.77 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.244 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 41.756α = 90
b = 219.585β = 90
c = 120.822γ = 90
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
DIALSdata reduction
Aimlessdata scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Cancer Research UKUnited KingdomA23278
European Research Council (ERC)United Kingdom647849

Revision History  (Full details and data files)

  • Version 1.0: 2020-09-02
    Type: Initial release
  • Version 1.1: 2020-09-30
    Changes: Database references
  • Version 1.2: 2024-01-24
    Changes: Data collection, Database references, Refinement description