6GF1

The structure of the ubiquitin-like modifier FAT10 reveals a novel targeting mechanism for degradation by the 26S proteasome


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.211 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

The structure of the ubiquitin-like modifier FAT10 reveals an alternative targeting mechanism for proteasomal degradation.

Aichem, A.Anders, S.Catone, N.Stotz, S.Berg, A.Schwab, R.Scheuermann, S.Bialas, J.Schutz-Stoffregen, M.C.Schmidtke, G.Peter, C.Groettrup, M.Wiesner, S.

(2018) Nat Commun 9: 3321-3321

  • DOI: https://doi.org/10.1038/s41467-018-05776-3
  • Primary Citation of Related Structures:  
    6GF1, 6GF2

  • PubMed Abstract: 

    FAT10 is a ubiquitin-like modifier that directly targets proteins for proteasomal degradation. Here, we report the high-resolution structures of the two individual ubiquitin-like domains (UBD) of FAT10 that are joined by a flexible linker. While the UBDs of FAT10 show the typical ubiquitin-fold, their surfaces are entirely different from each other and from ubiquitin explaining their unique binding specificities. Deletion of the linker abrogates FAT10-conjugation while its mutation blocks auto-FAT10ylation of the FAT10-conjugating enzyme USE1 but not bulk conjugate formation. FAT10- but not ubiquitin-mediated degradation is independent of the segregase VCP/p97 in the presence but not the absence of FAT10's unstructured N-terminal heptapeptide. Stabilization of the FAT10 UBDs strongly decelerates degradation suggesting that the intrinsic instability of FAT10 together with its disordered N-terminus enables the rapid, joint degradation of FAT10 and its substrates without the need for FAT10 de-conjugation and partial substrate unfolding.


  • Organizational Affiliation

    Division of Immunology, Department of Biology, University of Konstanz, Konstanz, D-78457, Germany.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Ubiquitin D
A, B, C
83Homo sapiensMutation(s): 0 
Gene Names: UBDFAT10
UniProt & NIH Common Fund Data Resources
Find proteins for O15205 (Homo sapiens)
Explore O15205 
Go to UniProtKB:  O15205
PHAROS:  O15205
GTEx:  ENSG00000213886 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO15205
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.211 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 116.172α = 90
b = 116.172β = 90
c = 84.72γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Max Planck SocietyGermany--

Revision History  (Full details and data files)

  • Version 1.0: 2018-08-29
    Type: Initial release
  • Version 1.1: 2024-05-15
    Changes: Data collection, Database references