Biological Assembly 1  

 3D View: Structure

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A2B1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 23.12 kDa 
• Atom Count: 1623 
• Residue Count: 204 
• Unique protein chains: 2

2LVQ

gp78CUE domain bound to the proximal ubiquitin of K48-linked diubiquitin

• DOI: 10.2210/pdb2LVQ/pdb
• BMRB: 18584

• Classification: SIGNALING PROTEIN/LIGASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2012-07-09 Released: 2012-11-21 
• Deposition Author(s): Liu, S., Chen, Y., Huang, T., Tarasov, S.G., King, A., Li, J., Weissman, A.M., Byrd, R.A., Das, R.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 24 
• Selection Criteria: structures with the lowest energy 

Literature

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

• PubMed: 23123110 
• DOI: 10.1016/j.str.2012.09.020
• Primary Citation of Related Structures:  
  2LVQ, 2LVP, 2LVO, 2LVN


• 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.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Ubiquitin	A, B	76	Homo sapiens	Mutation(s): 0  Gene Names: UBC
Find proteins for P0CG48 (Homo sapiens) Explore P0CG48  Go to UniProtKB:  P0CG48
NIH Common Fund Data Resources
PHAROS  P0CG48

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
E3 ubiquitin-protein ligase AMFR	D	52	Homo sapiens	Mutation(s): 0  Gene Names: AMFR, RNF45 EC: 6.3.2 (PDB Primary Data), 2.3.2.27 (UniProt)
Find proteins for Q9UKV5 (Homo sapiens) Explore Q9UKV5  Go to UniProtKB:  Q9UKV5
NIH Common Fund Data Resources
PHAROS  Q9UKV5 GTEx  ENSG00000159461

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 24 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 2LVQ Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2012-07-09 
• Released Date: 2012-11-21 
Deposition Author(s): Liu, S., Chen, Y., Huang, T., Tarasov, S.G., King, A., Li, J., Weissman, A.M., Byrd, R.A., Das, R.

Revision History 

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