6HCZ

Sjoegren syndrome/scleroderma autoantigen 1 (SSSCA1)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.224 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Sjogren syndrome/scleroderma autoantigen 1 is a direct Tankyrase binding partner in cancer cells.

Perdreau-Dahl, H.Progida, C.Barfeld, S.J.Guldsten, H.Thiede, B.Arntzen, M.Bakke, O.Mills, I.G.Krauss, S.Morth, J.P.

(2020) Commun Biol 3: 123-123

  • DOI: https://doi.org/10.1038/s42003-020-0851-2
  • Primary Citation of Related Structures:  
    6HCZ

  • PubMed Abstract: 

    Sjögren syndrome/scleroderma autoantigen 1 (SSSCA1) was first described as an auto-antigen over-expressed in Sjögren's syndrome and in scleroderma patients. SSSCA1 has been linked to mitosis and centromere association and as a potential marker candidate in diverse solid cancers. Here we characterize SSSCA1 for the first time, to our knowledge, at the molecular, structural and subcellular level. We have determined the crystal structure of a zinc finger fold, a zinc ribbon domain type 2 (ZNRD2), at 2.3 Å resolution. We show that the C-terminal domain serves a dual function as it both behaves as the interaction site to Tankyrase 1 (TNKS1) and as a nuclear export signal. We identify TNKS1 as a direct binding partner of SSSCA1, map the binding site to TNKS1 ankyrin repeat cluster 2 (ARC2) and thus define a new binding sequence. We experimentally verify and map a new nuclear export signal sequence in SSSCA1.


  • Organizational Affiliation

    Membrane Transport Group, Centre for Molecular Medicine Norway (NCMM), Nordic EMBL Partnership, University of Oslo, P.O. Box 1137 Blindern, 0318, Oslo, Norway.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Sjoegren syndrome/scleroderma autoantigen 1
A, B
199Homo sapiensMutation(s): 0 
Gene Names: SSSCA1
UniProt & NIH Common Fund Data Resources
Find proteins for O60232 (Homo sapiens)
Explore O60232 
Go to UniProtKB:  O60232
PHAROS:  O60232
GTEx:  ENSG00000173465 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO60232
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.224 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 49.49α = 90
b = 49.49β = 90
c = 164.18γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2020-03-18
    Type: Initial release
  • Version 1.1: 2020-03-25
    Changes: Database references