Solution structure of the Josephin domain of Ataxin-3

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

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This is version 1.3 of the entry. See complete history


The solution structure of the Josephin domain of ataxin-3: Structural determinants for molecular recognition

Nicastro, G.Menon, R.P.Masino, L.Knowles, P.P.McDonald, N.Q.Pastore, A.

(2005) Proc Natl Acad Sci U S A 102: 10493-10498

  • DOI: https://doi.org/10.1073/pnas.0501732102
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The Josephin domain plays an important role in the cellular functions of ataxin-3, the protein responsible for the neurodegenerative Machado-Joseph disease. We have determined the solution structure of Josephin and shown that it belongs to the family of papain-like cysteine proteases, sharing the highest degree of structural similarity with bacterial staphopain. A currently unique structural feature of Josephin is a flexible helical hairpin formed by a 32-residue insertion, which could determine substrate specificity. By using the Josephin structure and the availability of NMR chemical shift assignments, we have mapped the enzyme active site by using the typical cysteine protease inhibitors, transepoxysuccinyl-L-eucylamido-4-guanidino-butane (E-64) and [L-3-trans-(propylcarbamyl)oxirane-2-carbonyl]-L-isoleucyl-L-proline (CA-074). We also demonstrate that the specific interaction of Josephin with the ubiquitin-like domain of the ubiquitin- and proteasome-binding factor HHR23B involves complementary exposed hydrophobic surfaces. The structural similarity with other deubiquitinating enzymes suggests a model for the proteolytic enzymatic activity of ataxin-3.

  • Organizational Affiliation

    National Institute for Medical Research, The Ridgeway, London NW7 1AA, United Kingdom.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Machado-Joseph disease protein 1182Homo sapiensMutation(s): 0 
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Find proteins for P54252 (Homo sapiens)
Explore P54252 
Go to UniProtKB:  P54252
PHAROS:  P54252
GTEx:  ENSG00000066427 
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UniProt GroupP54252
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-07-05
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-03-02
    Changes: Database references, Derived calculations