Macromolecule Content

• Total Structure Weight: 18.78 kDa 
• Atom Count: 1302 
• Residue Count: 165 
• Unique protein chains: 1

2KLY

Solution structure of human ubiquitin conjugating enzyme Ube2g2

• DOI: 10.2210/pdb2KLY/pdb
• BMRB: 16404

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


• Deposited: 2009-07-10 Released: 2010-03-02 
• Deposition Author(s): Ju, T., Bocik, W., Majumdar, A., Tolman, J.R.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 10 
• Selection Criteria: 10 structures for lowest energy 

Literature

Solution structure and dynamics of human ubiquitin conjugating enzyme Ube2g2.

Ju, T., Bocik, W., Majumdar, A., Tolman, J.R.

(2010) Proteins 78: 1291-1301

• PubMed: 20014027 
• DOI: 10.1002/prot.22648
• Primary Citation of Related Structures:  
  2KLY


• PubMed Abstract: 
  

Ube2g2 is an E2 enzyme which functions as part of the endoplasmic reticulum-associated degradation (ERAD) pathway responsible for identification and degradation of misfolded proteins in the endoplasmic reticulum. In tandem with a cognate E3 ligase, Ube2g2 assembles K48-linked polyubiquitin chains and then transfers them to substrate, leading ultimately to proteasomal degradation of the polyubiquitin-tagged substrate. We report here the solution structure and backbone dynamics of Ube2g2 solved by nuclear magnetic resonance spectroscopy. Although the solution structure agrees well with crystallographic structures for the E2 core, catalytically important loops (encompassing residues 95-107 and 130-135) flanking the active site cysteine are poorly defined. (15)N spin relaxation and residual dipolar coupling analysis directly demonstrates that these two loops are highly dynamic in solution. These results suggest that Ube2g2 requires one or more of its protein partners, such as cognate E3, acceptor ubiquitin substrate or thiolester-linked donor ubiquitin, to assume its catalytically relevant conformation. Within the NMR structural ensemble, interactions were observed between His94 and the highly mobile loop residues Asp98 and Asp99, supporting a possible role for His94 as a general base activated by the carboxylate side-chains of Asp98 or Asp99.

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Organizational Affiliation: 

Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Ubiquitin-conjugating enzyme E2 G2	A	167	Homo sapiens	Mutation(s): 0  Gene Names: UBE2G2, UBC7 EC: 6.3.2.19 (PDB Primary Data), 2.3.2.23 (UniProt)
Find proteins for P60604 (Homo sapiens) Explore P60604  Go to UniProtKB:  P60604
NIH Common Fund Data Resources
PHAROS:  P60604 GTEx:  ENSG00000184787

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 10 
• Selection Criteria: 10 structures for lowest energy 
• OLDERADO: 2KLY Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2009-07-10 
• Released Date: 2010-03-02 
Deposition Author(s): Ju, T., Bocik, W., Majumdar, A., Tolman, J.R.

Revision History 

• Version 1.0: 2010-03-02
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance