4B9X

Structure of extended Tudor domain TD3 from mouse TDRD1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.223 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The Multiple Tudor Domain-Containing Protein Tdrd1 is a Molecular Scaffold for Mouse Piwi Proteins and Pirna Biogenesis Factors.

Mathioudakis, N.Palencia, A.Kadlec, J.Round, A.Tripsianes, K.Sattler, M.Pillai, R.S.Cusack, S.

(2012) RNA 18: 2056

  • DOI: 10.1261/rna.034181.112
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Piwi-interacting RNAs (piRNAs) are small noncoding RNAs expressed in the germline of animals. They associate with Argonaute proteins of the Piwi subfamily, forming ribonucleoprotein complexes that are involved in maintaining genome integrity. The N-t ...

    Piwi-interacting RNAs (piRNAs) are small noncoding RNAs expressed in the germline of animals. They associate with Argonaute proteins of the Piwi subfamily, forming ribonucleoprotein complexes that are involved in maintaining genome integrity. The N-terminal region of some Piwi proteins contains symmetrically dimethylated arginines. This modification is thought to enable recruitment of Tudor domain-containing proteins (TDRDs), which might serve as platforms mediating interactions between various proteins in the piRNA pathway. We measured the binding affinity of the four individual extended Tudor domains (TDs) of murine TDRD1 protein for three different methylarginine-containing peptides from murine Piwi protein MILI. The results show a preference of TD2 and TD3 for consecutive MILI peptides, whereas TD4 and TD1 have, respectively, lower and very weak affinity for any peptide. The affinity of TD1 for methylarginine peptides can be restored by a single-point mutation back to the consensus aromatic cage sequence. These observations were confirmed by pull-down experiments with endogenous Piwi and Piwi-associated proteins. The crystal structure of TD3 bound to a methylated MILI peptide shows an unexpected orientation of the bound peptide, with additional contacts of nonmethylated residues being made outside of the aromatic cage, consistent with solution NMR titration experiments. Finally, the molecular envelope of the four tandem Tudor domains of TDRD1, derived from small angle scattering data, reveals a flexible, elongated shape for the protein. Overall, the results show that TDRD1 can accommodate different peptides from different proteins, and can therefore act as a scaffold protein for complex assembly in the piRNA pathway.


    Organizational Affiliation

    European Molecular Biology Laboratory, Grenoble Outstation and Unit of Virus Host-Cell Interactions, UJF-EMBL-CNRS, UMI 3265, BP181, 38042 Grenoble Cedex 9, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TUDOR DOMAIN-CONTAINING PROTEIN 1
A
226Mus musculusMutation(s): 0 
Gene Names: Tdrd1
Find proteins for Q99MV1 (Mus musculus)
Go to UniProtKB:  Q99MV1
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.223 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 62.960α = 90.00
b = 62.960β = 90.00
c = 132.480γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
PHASERphasing
REFMACrefinement
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-10-17
    Type: Initial release
  • Version 1.1: 2012-10-31
    Type: Database references