Crystal structure of N-terminal domains of Human La protein complexed with RNA oligomer AUUUU

Experimental Data Snapshot

  • Resolution: 2.80 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.261 
  • R-Value Observed: 0.261 

Starting Model: experimental
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Structural Analysis Reveals Conformational Plasticity in the Recognition of RNA 3' Ends by the Human La Protein.

Kotik-Kogan, O.Valentine, E.R.Sanfelice, D.Conte, M.R.Curry, S.

(2008) Structure 16: 852

  • DOI: https://doi.org/10.1016/j.str.2008.02.021
  • Primary Citation of Related Structures:  
    2VOD, 2VON, 2VOO, 2VOP

  • PubMed Abstract: 

    The eukaryotic La protein recognizes the 3' poly(U) sequences of nascent RNA polymerase III transcripts to assist folding and maturation. The 3' ends of such RNAs are bound by the N-terminal domain of La (LaNTD). We have solved the crystal structures of four LaNTD:RNA complexes, each containing a different single-stranded RNA oligomer, and compared them to the structure of a previously published LaNTD:RNA complex containing partially duplex RNA. The presence of purely single-stranded RNA in the binding pocket at the interface between the La motif and RRM domains allows significantly closer contact with the 3' end of the RNA. Comparison of the different LaNTD:RNA complexes identifies a conserved set of interactions with the last two nucleotides at the 3' end of the RNA ligand that are key to binding. Strikingly, we also observe two alternative conformations of bound ssRNA, indicative of an unexpected degree of plasticity in the modes of RNA binding.

  • Organizational Affiliation

    Biophysics Section, Blackett Laboratory, Imperial College, Exhibition Road, London, United Kingdom.


Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
LUPUS LA PROTEIN193Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P05455 (Homo sapiens)
Explore P05455 
Go to UniProtKB:  P05455
GTEx:  ENSG00000138385 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP05455
Sequence Annotations
  • Reference Sequence

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Entity ID: 2
MoleculeChains LengthOrganismImage
5'-R(*AP*UP*UP*UP*UP)-3'5Homo sapiens
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.80 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.261 
  • R-Value Observed: 0.261 
  • Space Group: C 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 96.07α = 90
b = 116.69β = 90
c = 63.51γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALEdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-05-06
    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: 2023-12-13
    Changes: Data collection, Database references, Other, Refinement description