Crystal structure of human CTNNBL1(residues 77~563)

Experimental Data Snapshot

  • Resolution: 2.74 Å
  • R-Value Free: 0.319 
  • R-Value Work: 0.247 
  • R-Value Observed: 0.251 

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This is version 1.3 of the entry. See complete history


Structural insights into the novel ARM-repeat protein CTNNBL1 and its association with the hPrp19-CDC5L complex

Ahn, J.W.Kim, S.Kim, E.J.Kim, Y.J.Kim, K.J.

(2014) Acta Crystallogr D Biol Crystallogr 70: 780-788

  • DOI: https://doi.org/10.1107/S139900471303318X
  • Primary Citation of Related Structures:  
    4MFU, 4MFV

  • PubMed Abstract: 

    The hPrp19-CDC5L complex plays a crucial role during human pre-mRNA splicing by catalytic activation of the spliceosome. In order to elucidate the molecular architecture of the hPrp19-CDC5L complex, the crystal structure of CTNNBL1, one of the major components of this complex, was determined. Unlike canonical ARM-repeat proteins such as β-catenin and importin-α, CTNNBL1 was found to contain a twisted and extended ARM-repeat structure at the C-terminal domain and, more importantly, the protein formed a stable dimer. A highly negatively charged patch formed in the N-terminal ARM-repeat domain of CTNNBL1 provides a binding site for CDC5L, a binding partner of the protein in the hPrp19-CDC5L complex, and these two proteins form a complex with a stoichiometry of 2:2. These findings not only present the crystal structure of a novel ARM-repeat protein, CTNNBL1, but also provide insights into the detailed molecular architecture of the hPrp19-CDC5L complex.

  • Organizational Affiliation

    Structural and Molecular Biology Laboratory, School of Life Sciences and Biotechnology, Kyungpook National University, Daehak-ro 80, Buk-ku, Daegu 702-701, Republic of Korea.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Beta-catenin-like protein 1490Homo sapiensMutation(s): 0 
Gene Names: CTNNBL1C20orf33PP8304
UniProt & NIH Common Fund Data Resources
Find proteins for Q8WYA6 (Homo sapiens)
Explore Q8WYA6 
Go to UniProtKB:  Q8WYA6
GTEx:  ENSG00000132792 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8WYA6
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.74 Å
  • R-Value Free: 0.319 
  • R-Value Work: 0.247 
  • R-Value Observed: 0.251 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 90.149α = 90
b = 90.149β = 90
c = 178.557γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-03-12
    Type: Initial release
  • Version 1.1: 2014-04-23
    Changes: Database references
  • Version 1.2: 2017-11-15
    Changes: Refinement description
  • Version 1.3: 2024-03-20
    Changes: Data collection, Database references