Crystal Structure of the RING domain of RNF168

Experimental Data Snapshot

  • Resolution: 2.60 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.228 

wwPDB Validation   3D Report Full Report

This is version 1.0 of the entry. See complete history


Structural basis for role of ring finger protein RNF168 RING domain

Zhang, X.Q.Chen, J.Wu, M.Wu, H.Arokiaraj, A.W.Wang, C.L.Zhang, W.Tao, Y.Huen, M.S.Zang, J.Y.

(2013) Cell Cycle 12: 312-321

  • DOI: https://doi.org/10.4161/cc.23104
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Ubiquitin adducts surrounding DNA double-strand breaks (DSBs) have emerged as molecular platforms important for the assembly of DNA damage mediator and repair proteins. Central to these chromatin modifications lies the E2 UBC13, which has been implicated in a bipartite role in priming and amplifying lys63-linked ubiquitin chains on histone molecules through coupling with the E3 RNF8 and RNF168. However, unlike the RNF8-UBC13 holoenyzme, exactly how RNF168 work in concert with UBC13 remains obscure. To provide a structural perspective for the RNF168-UBC13 complex, we solved the crystal structure of the RNF168 RING domain. Interestingly, while the RNF168 RING adopts a typical RING finger fold with two zinc ions coordinated by several conserved cystine and histine residues arranged in a C3HC4 "cross-brace" manner, structural superimposition of RNF168 RING with other UBC13-binding E3 ubiquitin ligases revealed substantial differences at its corresponding UBC13-binding interface. Consistently, and in stark contrast to that between RNF8 and UBC13, RNF168 did not stably associate with UBC13 in vitro or in vivo. Moreover, domain-swapping experiments indicated that the RNF8 and RNF168 RING domains are not functionally interchangeable. We propose that RNF8 and RNF168 operate in different modes with their cognate E2 UBC13 at DSBs.

  • Organizational Affiliation

    Hefei National Laboratory for Physical Sciences at Microscale and School of Life Sciences, University of Science and Technology of China, Hefei, People's Republic of China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
E3 ubiquitin-protein ligase RNF168121Homo sapiensMutation(s): 0 
Gene Names: RNF168
EC: 6.3.2
UniProt & NIH Common Fund Data Resources
Find proteins for Q8IYW5 (Homo sapiens)
Explore Q8IYW5 
Go to UniProtKB:  Q8IYW5
GTEx:  ENSG00000163961 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8IYW5
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.60 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.228 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 50.16α = 90
b = 50.16β = 90
c = 113.93γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-07-10
    Type: Initial release