1A5R

STRUCTURE DETERMINATION OF THE SMALL UBIQUITIN-RELATED MODIFIER SUMO-1, NMR, 10 STRUCTURES


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 30 
  • Conformers Submitted: 10 
  • Selection Criteria: ENERGY 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure determination of the small ubiquitin-related modifier SUMO-1.

Bayer, P.Arndt, A.Metzger, S.Mahajan, R.Melchior, F.Jaenicke, R.Becker, J.

(1998) J.Mol.Biol. 280: 275-286

  • DOI: 10.1006/jmbi.1998.1839

  • PubMed Abstract: 
  • The recently discovered small ubiquitin-related modifier SUMO-1 belongs to the growing family of ubiquitin-related proteins involved in postranslational protein modification. Unlike ubiquitin, SUMO-1 does not appear to target proteins for degradation ...

    The recently discovered small ubiquitin-related modifier SUMO-1 belongs to the growing family of ubiquitin-related proteins involved in postranslational protein modification. Unlike ubiquitin, SUMO-1 does not appear to target proteins for degradation but seems to be involved in the modulation of protein-protein interactions. Independent studies demonstrate an essential function of SUMO-1 in the regulation of nucleo-cytoplasmic transport, and suggest a role in cell-cycle regulation and apoptosis. Here, we present the first three-dimensional structure of SUMO-1 solved by NMR. Although having only 18% amino acid sequence identity with ubiquitin, the overall structure closely resembles that of ubiquitin, featuring the betabetaalphabetabetaalphabeta fold of the ubiquitin protein family. In addition, the position of the two C-terminal Gly residues required for isopeptide bond formation is conserved between ubiquitin and SUMO-1. The most prominent feature of SUMO-1 is a long and highly flexible N terminus, which protrudes from the core of the protein and which is absent in ubiquitin. Furthermore, ubiquitin Lys48, required to generate ubiquitin polymers, is substituted in SUMO-1 by Gln69 at the same position, which provides an explanation of why SUMO-1 has not been observed to form polymers. Moreover, the hydrophobic core of SUMO-1 and ubiquitin is maintained by conserved hydrophobic residues, whereas the overall charge topology of SUMO-1 and ubiquitin differs significantly, suggesting specific modifying enzymes and target proteins for both proteins.


    Related Citations: 
    • A Small Ubiquitin-Related Polypeptide Involved in Targeting Rangap1 to Nuclear Pore Complex Protein Ranbp2
      Mahajan, R.,Delphin, C.,Guan, T.,Gerace, L.,Melchior, F.
      (1997) Cell 88: 97
    • A Novel Ubiquitin-Like Modification Modulates the Partitioning of the Ran-Gtpase-Activating Protein Rangap1 between the Cytosol and the Nuclear Pore Complex
      Matunis, M.J.,Coutavas, E.,Blobel, G.
      (1996) J.Cell Biol. 135: 1457
    • Preferential Modification of Nuclear Proteins by a Novel Ubiquitin-Like Molecule
      Kamitani, T.,Nguyen, H.P.,Yeh, E.T.
      (1997) J.Biol.Chem. 272: 14001


    Organizational Affiliation

    Abteilung Physikalische Biochemie, Max-Planck-Institut für molekulare Physiologie, Dortmund, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SUMO-1
A
103Homo 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: SOLUTION NMR
  • Conformers Calculated: 30 
  • Conformers Submitted: 10 
  • Selection Criteria: ENERGY 
  • Olderado: 1A5R Olderado
Software Package:
Software NamePurpose
X-PLORrefinement
X-PLORmodel building
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-10-14
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance