Experimental Data Snapshot

  • Resolution: 1.40 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.216 

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This is version 1.4 of the entry. See complete history


Identification, characterization and crystal structure analysis of the human spliceosomal U5 snRNP-specific 15 kD protein.

Reuter, K.Nottrott, S.Fabrizio, P.Luhrmann, R.Ficner, R.

(1999) J Mol Biol 294: 515-525

  • DOI: https://doi.org/10.1006/jmbi.1999.3258
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The U5 small ribonucleoprotein particle (snRNP) contains various proteins involved in catalytic activities mediating conformational rearrangements of the spliceosome. We have isolated and characterized the evolutionarily highly conserved human U5 snRNP-specific protein U5-15kD. The crystal structure of U5-15kD determined at 1.4 A resolution revealed a thioredoxin-like fold and represents the first structure of a U5 snRNP-specific protein known so far. With respect to human thioredoxin the U5-15kD protein contains 37 additional residues causing structural changes which most likely form putative binding sites for other spliceosomal proteins or RNA. Moreover, a novel intramolecular disulfide bond replaces the canonical one found in the thioredoxin family. Even though U5-15kD appears to lack protein disulfide isomerase activity, it is strictly required for pre-mRNA splicing in vivo as we demonstrate by genetic depletion of its ortholog in Saccharomyces cerevisiae. Our data suggest that the previously reported involvement of its Schizosaccharomyces pombe ortholog Dim1p in cell cycle regulation is a consequence of its essential role in pre-mRNA splicing.

  • Organizational Affiliation

    Institut für Molekularbiologie und Tumorforschung, Universität Marburg, 35037, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
SPLICEOSOMAL PROTEIN U5-15KD142Homo sapiensMutation(s): 0 
Gene Names: U5-15KD
UniProt & NIH Common Fund Data Resources
Find proteins for P83876 (Homo sapiens)
Explore P83876 
Go to UniProtKB:  P83876
PHAROS:  P83876
GTEx:  ENSG00000141759 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP83876
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.40 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.216 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 61.225α = 90
b = 65.092β = 90
c = 36.275γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1999-12-12
    Type: Initial release
  • Version 1.1: 2008-04-26
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-11-27
    Changes: Database references
  • Version 1.4: 2023-12-27
    Changes: Data collection, Database references