1OIA | pdb_00001oia

U1A rnp domain 1-95

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 
    0.242 (Depositor), 0.241 (DCC) 
  • R-Value Work: 
    0.192 (Depositor), 0.194 (DCC) 
  • R-Value Observed: 
    0.194 (Depositor) 

wwPDB Validation 3D Report Full Report

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This is version 1.3 of the entry. See complete history. 

Literature

Crystal Structure of the RNA-Binding Domain of the U1 Small Nuclear Ribonucleoprotein A

Nagai, K., Oubridge, C., Jessen, T.H., Li, J., Evans, P.R.

(1990) Nature 348: 515

  • DOI: https://doi.org/10.1038/348515a0
  • Primary Citation Related Structures: 
    1OIA

  • PubMed Abstract: 

    The crystal structure of the RNA binding domain of the U1 small nuclear ribonucleoprotein A, which forms part of the ribonucleoprotein complex involved in the excision of introns, has been solved. It contains a four-stranded beta sheet and two alpha helices. The highly conserved segments designated RNP1 and RNP2 lie side by side on the middle two beta strands. U1 RNA binding studies of mutant proteins suggest that the RNA binds to the four-stranded beta sheet and to the flexible loops on one end.

    • Organizational Affiliation: 
    • MRC Laboratory of Molecular Biology, Cambridge, UK.

Macromolecule Content 

  • Total Structure Weight: 21.89 kDa 
  • Atom Count: 1,529 
  • Modeled Residue Count: 176 
  • Deposited Residue Count: 190 
  • Unique protein chains: 1

Macromolecules

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|  3D Structure
Entity ID: 1
MoleculeChains  Sequence LengthOrganismDetailsImage
U1 SMALL NUCLEAR RIBONUCLEOPROTEIN A
A, B
95Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P09012 (Homo sapiens)
Explore P09012 
Go to UniProtKB:  P09012
PHAROS:  P09012
GTEx:  ENSG00000077312 
Entity Groups
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP09012
Sequence Annotations
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Reference Sequence

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free:  0.242 (Depositor), 0.241 (DCC) 
  • R-Value Work:  0.192 (Depositor), 0.194 (DCC) 
  • R-Value Observed: 0.194 (Depositor) 
Space Group: I 41 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 148.125α = 90
b = 148.125β = 90
c = 148.125γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
WEISdata reduction
SCALAdata scaling
MLPHAREphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-06-26
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-05-08
    Changes: Data collection, Database references, Other