2VON

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.230 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

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

  • Primary Citation of Related Structures:  

  • 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 ...

    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.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
LUPUS LA PROTEIN
A, B
193Homo sapiensMutation(s): 0 
Gene Names: SSB
Find proteins for P05455 (Homo sapiens)
Go to Gene View: SSB
Go to UniProtKB:  P05455
Entity ID: 2
MoleculeChainsLengthOrganism
5'-R(*AP*UP*AP*AP*UP*UP*UP)-3'C,D7Homo sapiens
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.230 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 140.029α = 90.00
b = 44.471β = 114.35
c = 91.285γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
CNSrefinement
SCALEdata scaling
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-05-06
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance