1YTY

Structural basis for recognition of UUUOH 3'-terminii of nascent RNA pol III transcripts by La autoantigen


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.29 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.219 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Basis for Recognition and Sequestration of UUU(OH) 3' Temini of Nascent RNA Polymerase III Transcripts by La, a Rheumatic Disease Autoantigen.

Teplova, M.Yuan, Y.R.Phan, A.T.Malinina, L.Ilin, S.Teplov, A.Patel, D.J.

(2006) Mol.Cell 21: 75-85

  • DOI: 10.1016/j.molcel.2005.10.027
  • Primary Citation of Related Structures:  1ZH5

  • PubMed Abstract: 
  • The nuclear phosphoprotein La was identified as an autoantigen in patients with systemic lupus erythematosus and Sjogren's syndrome. La binds to and protects the UUU(OH) 3' terminii of nascent RNA polymerase III transcripts from exonuclease digestion ...

    The nuclear phosphoprotein La was identified as an autoantigen in patients with systemic lupus erythematosus and Sjogren's syndrome. La binds to and protects the UUU(OH) 3' terminii of nascent RNA polymerase III transcripts from exonuclease digestion. We report the 1.85 angstroms crystal structure of the N-terminal domain of human La, consisting of La and RRM1 motifs, bound to r(U1-G2-C3-U4-G5-U6-U7-U8-U9OH). The U7-U8-U9OH 3' end, in a splayed-apart orientation, is sequestered within a basic and aromatic amino acid-lined cleft between the La and RRM1 motifs. The specificity-determining U8 residue bridges both motifs, in part through unprecedented targeting of the beta sheet edge, rather than the anticipated face, of the RRM1 motif. Our structural observations, supported by mutation studies of both La and RNA components, illustrate the principles behind RNA sequestration by a rheumatic disease autoantigen, whereby the UUU(OH) 3' ends of nascent RNA transcripts are protected during downstream processing and maturation events.


    Organizational Affiliation

    Structural Biology Program, Memorial Sloan-Kettering Cancer Center, New York, New York 10021, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Lupus La protein
A, B
194Homo sapiensGene Names: SSB
Find proteins for P05455 (Homo sapiens)
Go to Gene View: SSB
Go to UniProtKB:  P05455
Entity ID: 1
MoleculeChainsLengthOrganism
5'-R(*UP*GP*CP*UP*GP*UP*UP*UP*U)-3'C,D9N/A
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.29 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.219 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 153.690α = 90.00
b = 54.001β = 90.00
c = 56.684γ = 90.00
Software Package:
Software NamePurpose
SHARPphasing
REFMACrefinement
SCALEPACKdata scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-01-17
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Version format compliance