2BF8

Crystal structure of SUMO modified ubiquitin conjugating enzyme E2- 25K


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.210 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Sumo Imodification of the Ubiquitin Conjugating Enzyme E2-25K

Pichler, A.Knipscheer, P.Oberhofer, E.Van Dijk, W.J.Korner, R.Velgaard Olsen, J.Jentsch, S.Melchior, F.Sixma, T.K.

(2005) Nat.Struct.Mol.Biol. 12: 264

  • DOI: 10.1038/nsmb903
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Post-translational modification with small ubiquitin-related modifier (SUMO) alters the function of many proteins, but the molecular mechanisms and consequences of this modification are still poorly defined. During a screen for novel SUMO1 targets, w ...

    Post-translational modification with small ubiquitin-related modifier (SUMO) alters the function of many proteins, but the molecular mechanisms and consequences of this modification are still poorly defined. During a screen for novel SUMO1 targets, we identified the ubiquitin-conjugating enzyme E2-25K (Hip2). SUMO attachment severely impairs E2-25K ubiquitin thioester and unanchored ubiquitin chain formation in vitro. Crystal structures of E2-25K(1-155) and of the E2-25K(1-155)-SUMO conjugate (E2-25K(*)SUMO) indicate that SUMO attachment interferes with E1 interaction through its location on the N-terminal helix. The SUMO acceptor site in E2-25K, Lys14, does not conform to the consensus site found in most SUMO targets (PsiKXE), and functions only in the context of an alpha-helix. In contrast, adjacent SUMO consensus sites are modified only when in unstructured peptides. The demonstration that secondary structure elements are part of SUMO attachment signals could contribute to a better prediction of SUMO targets.


    Organizational Affiliation

    University of Göttingen, Department of Biochemistry I, Humboldt Allee 23, 37073 Göttingen, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
UBIQUITIN-CONJUGATING ENZYME E2-25 KDA
A
159Bos taurusMutation(s): 0 
Gene Names: UBE2K (HIP2)
EC: 2.3.2.23
Find proteins for P61085 (Bos taurus)
Go to Gene View: UBE2K
Go to UniProtKB:  P61085
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
UBIQUITIN-LIKE PROTEIN SMT3C
B
77Homo sapiensMutation(s): 0 
Gene Names: SUMO1 (SMT3C, SMT3H3, UBL1)
Find proteins for P63165 (Homo sapiens)
Go to Gene View: SUMO1
Go to UniProtKB:  P63165
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.210 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 58.391α = 90.00
b = 58.391β = 90.00
c = 162.842γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
REFMACrefinement
SCALAdata scaling
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-02-16
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance