Structure of the gp78 CUE domain

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

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Promiscuous Interactions of gp78 E3 Ligase CUE Domain with Polyubiquitin Chains.

Liu, S.Chen, Y.Li, J.Huang, T.Tarasov, S.King, A.Weissman, A.M.Byrd, R.A.Das, R.

(2012) Structure 20: 2138-2150

  • DOI: https://doi.org/10.1016/j.str.2012.09.020
  • Primary Citation of Related Structures:  
    2LVN, 2LVO, 2LVP, 2LVQ

  • PubMed Abstract: 

    Recognition of ubiquitin and polyubiquitin chains by ubiquitin-binding domains (UBDs) is vital for ubiquitin-mediated signaling pathways. The endoplasmic reticulum resident RING finger ubiquitin ligase (E3) gp78 regulates critical proteins via the ubiquitin-proteasome system to maintain cellular homeostasis and includes a UBD known as the CUE domain, which is essential for function. A probable role of this domain is to recognize ubiquitin-modified substrates, enabling gp78 to assemble polyubiquitin chains on these substrates and mark them for degradation. Here, we report the molecular details of the interaction of gp78CUE domain with ubiquitin and diubiquitin. The gp78CUE domain exhibits a well-defined set of interactions with ubiquitin and a dynamic, promiscuous interaction with diubiquitin chains. This leads to a model in which the CUE domain functions to both facilitate substrate binding and enable switching between adjacent ubiquitin molecules of a growing chain to enable processivity in ubiquitination.

  • Organizational Affiliation

    Structural Biophysics Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702-1201, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
E3 ubiquitin-protein ligase AMFRA [auth C]52Homo sapiensMutation(s): 0 
Gene Names: AMFRRNF45
EC: 6.3.2
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UKV5 (Homo sapiens)
Explore Q9UKV5 
Go to UniProtKB:  Q9UKV5
GTEx:  ENSG00000159461 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9UKV5
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-11-21
    Type: Initial release
  • Version 1.1: 2012-12-26
    Changes: Database references