Structure of Wildtype human UAP56

Experimental Data Snapshot

  • Resolution: 1.95 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.218 

Starting Models: experimental
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This is version 1.3 of the entry. See complete history


Crystal structure of the human ATP-dependent splicing and export factor UAP56

Shi, H.Cordin, O.Minder, C.M.Linder, P.Xu, R.M.

(2004) Proc Natl Acad Sci U S A 101: 17628-17633

  • DOI: https://doi.org/10.1073/pnas.0408172101
  • Primary Citation of Related Structures:  
    1XTI, 1XTJ, 1XTK

  • PubMed Abstract: 

    Pre-mRNA splicing requires the function of a number of RNA-dependent ATPases/helicases, yet no three-dimensional structure of any spliceosomal ATPases/helicases is known. The highly conserved DECD-box protein UAP56/Sub2 is an essential splicing factor that is also important for mRNA export. The expected ATPase/helicase activity appears to be essential for the UAP56/Sub2 functions. Here, we show that purified human UAP56 is an active RNA-dependent ATPase, and we also report the crystal structures of UAP56 alone and in complex with ADP, as well as a DECD to DEAD mutant. The structures reveal a unique spatial arrangement of the two conserved helicase domains, and ADP-binding induces significant conformational changes of key residues in the ATP-binding pocket. Our structural analyses suggest a specific protein-RNA displacement model of UAP56/Sub2. The detailed structural information provides important mechanistic insights into the splicing function of UAP56/Sub2. The structures also will be useful for the analysis of other spliceosomal DExD-box ATPases/helicases.

  • Organizational Affiliation

    W. M. Keck Structural Biology Laboratory, Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Probable ATP-dependent RNA helicase p47391Homo sapiensMutation(s): 0 
Gene Names: BAT1
UniProt & NIH Common Fund Data Resources
Find proteins for Q13838 (Homo sapiens)
Explore Q13838 
Go to UniProtKB:  Q13838
GTEx:  ENSG00000198563 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ13838
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.95 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.218 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 37.16α = 95.701
b = 49.909β = 101.597
c = 62.665γ = 111.139
Software Package:
Software NamePurpose
HKL-2000data collection
SCALEPACKdata scaling
HKL-2000data reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-12-14
    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: 2023-08-23
    Changes: Data collection, Database references, Derived calculations, Refinement description