1YLA

Ubiquitin-conjugating enzyme E2-25 kDa (Huntington interacting protein 2)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.225 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis of E2-25K/UBB+1 interaction leading to proteasome inhibition and neurotoxicity

Ko, S.Kang, G.B.Song, S.M.Lee, J.-G.Shin, D.Y.Yun, J.-H.Sheng, Y.Cheong, C.Jeon, Y.H.Jung, Y.-K.Arrowsmith, C.H.Avvakumov, G.V.Dhe-Paganon, S.Yoo, Y.J.Eom, S.H.Lee, W.

(2010) J.Biol.Chem. 285: 36070-36080

  • DOI: 10.1074/jbc.M110.145219
  • Primary Citation of Related Structures:  3K9P

  • PubMed Abstract: 
  • E2-25K/Hip2 is an unusual ubiquitin-conjugating enzyme that interacts with the frameshift mutant of ubiquitin B (UBB(+1)) and has been identified as a crucial factor regulating amyloid-β neurotoxicity. To study the structural basis of the neurotoxici ...

    E2-25K/Hip2 is an unusual ubiquitin-conjugating enzyme that interacts with the frameshift mutant of ubiquitin B (UBB(+1)) and has been identified as a crucial factor regulating amyloid-β neurotoxicity. To study the structural basis of the neurotoxicity mediated by the E2-25K-UBB(+1) interaction, we determined the three-dimensional structures of UBB(+1), E2-25K and the E2-25K/ubiquitin, and E2-25K/UBB(+1) complex. The structures revealed that ubiquitin or UBB(+1) is bound to E2-25K via the enzyme MGF motif and residues in α9 of the enzyme. Polyubiquitylation assays together with analyses of various E2-25K mutants showed that disrupting UBB(+1) binding markedly diminishes synthesis of neurotoxic UBB(+1)-anchored polyubiquitin. These results suggest that the interaction between E2-25K and UBB(+1) is critical for the synthesis and accumulation of UBB(+1)-anchored polyubiquitin, which results in proteasomal inhibition and neuronal cell death.


    Organizational Affiliation

    Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 120-749, Korea.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ubiquitin-conjugating enzyme E2-25 kDa
A, B
202Homo sapiensGene Names: UBE2K (HIP2, LIG)
EC: 2.3.2.23
Find proteins for P61086 (Homo sapiens)
Go to Gene View: UBE2K
Go to UniProtKB:  P61086
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.225 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 37.831α = 64.19
b = 55.022β = 74.61
c = 61.762γ = 69.89
Software Package:
Software NamePurpose
CrystalCleardata reduction
CNSrefinement
AMoREphasing
CrystalCleardata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-02-01
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance