6S96

Crystal structure of the catalytic domain of UBE2S C118A.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.18 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.206 

Starting Model: experimental
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This is version 1.2 of the entry. See complete history


Literature

Dimerization regulates the human APC/C-associated ubiquitin-conjugating enzyme UBE2S.

Liess, A.K.L.Kucerova, A.Schweimer, K.Schlesinger, D.Dybkov, O.Urlaub, H.Mansfeld, J.Lorenz, S.

(2020) Sci Signal 13

  • DOI: https://doi.org/10.1126/scisignal.aba8208
  • Primary Citation of Related Structures:  
    6S96, 6S98

  • PubMed Abstract: 

    At the heart of protein ubiquitination cascades, ubiquitin-conjugating enzymes (E2s) form reactive ubiquitin-thioester intermediates to enable efficient transfer of ubiquitin to cellular substrates. The precise regulation of E2s is thus crucial for cellular homeostasis, and their deregulation is frequently associated with tumorigenesis. In addition to driving substrate ubiquitination together with ubiquitin ligases (E3s), many E2s can also autoubiquitinate, thereby promoting their own proteasomal turnover. To investigate the mechanisms that balance these disparate activities, we dissected the regulatory dynamics of UBE2S, a human APC/C-associated E2 that ensures the faithful ubiquitination of cell cycle regulators during mitosis. We uncovered a dimeric state of UBE2S that confers autoinhibition by blocking a catalytically critical ubiquitin binding site. Dimerization is stimulated by the lysine-rich carboxyl-terminal extension of UBE2S that is also required for the recruitment of this E2 to the APC/C and is autoubiquitinated as substrate abundance becomes limiting. Consistent with this mechanism, we found that dimerization-deficient UBE2S turned over more rapidly in cells and did not promote mitotic slippage during prolonged drug-induced mitotic arrest. We propose that dimerization attenuates the autoubiquitination-induced turnover of UBE2S when the APC/C is not fully active. More broadly, our data illustrate how the use of mutually exclusive macromolecular interfaces enables modulation of both the activities and the abundance of E2s in cells to facilitate precise ubiquitin signaling.


  • Organizational Affiliation

    Rudolf Virchow Center for Integrative and Translational Bioimaging, University of Würzburg, 97080 Würzburg, Germany.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Ubiquitin-conjugating enzyme E2 SA [auth B],
B [auth A]
157Homo sapiensMutation(s): 1 
Gene Names: UBE2SE2EPFOK/SW-cl.73
EC: 2.3.2.23
UniProt & NIH Common Fund Data Resources
Find proteins for Q16763 (Homo sapiens)
Explore Q16763 
Go to UniProtKB:  Q16763
PHAROS:  Q16763
GTEx:  ENSG00000108106 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ16763
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.18 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.206 
  • Space Group: P 61
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 120.927α = 90
b = 120.927β = 90
c = 45.344γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
German Research FoundationGermanyEmmy Noether LO2003/1-1
German Research FoundationGermanyGRK 2243

Revision History  (Full details and data files)

  • Version 1.0: 2020-10-21
    Type: Initial release
  • Version 1.1: 2020-11-04
    Changes: Database references
  • Version 1.2: 2024-01-24
    Changes: Data collection, Database references, Refinement description