2WAY

Structure of the human DDX6 C-terminal domain in complex with an EDC3- FDF peptide

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.210 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 

Literature

Structural Basis for the Mutually Exclusive Anchoring of P Body Components Edc3 and Tral to the Dead Box Protein Ddx6/Me31B.

Tritschler, F., Braun, J.E., Eulalio, A., Truffault, V., Izaurralde, E., Weichenrieder, O.

(2009) Mol.Cell 33: 661

  • DOI: 10.1016/j.molcel.2009.02.014
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • The DEAD box helicase DDX6/Me31B functions in translational repression and mRNA decapping. How particular RNA helicases are recruited specifically to distinct functional complexes is poorly understood. We present the crystal structure of the DDX6 C-t ...

    The DEAD box helicase DDX6/Me31B functions in translational repression and mRNA decapping. How particular RNA helicases are recruited specifically to distinct functional complexes is poorly understood. We present the crystal structure of the DDX6 C-terminal RecA-like domain bound to a highly conserved FDF sequence motif in the decapping activator EDC3. The FDF peptide adopts an alpha-helical conformation upon binding to DDX6, occupying a shallow groove opposite to the DDX6 surface involved in RNA binding and ATP hydrolysis. Mutagenesis of Me31B shows the relevance of the FDF interaction surface both for Me31B's accumulation in P bodies and for its ability to repress the expression of bound mRNAs. The translational repressor Tral contains a similar FDF motif. Together with mutational and competition studies, the structure reveals why the interactions of Me31B with EDC3 and Tral are mutually exclusive and how the respective decapping and translational repressor complexes might hook onto an mRNA substrate.

    Organizational Affiliation: 

    Max Planck Institute for Developmental Biology, Tübingen, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ATP-DEPENDENT RNA HELICASE DDX6
A, C
193Homo sapiensMutation(s): 0 
Gene Names: DDX6 (HLR2, RCK)
EC: 3.6.4.13
Find proteins for P26196 (Homo sapiens)
Go to Gene View: DDX6
Go to UniProtKB:  P26196
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
ENHANCER OF MRNA-DECAPPING PROTEIN 3
B, D
44Homo sapiensMutation(s): 0 
Gene Names: EDC3 (LSM16, YJDC, YJEFN2)
Find proteins for Q96F86 (Homo sapiens)
Go to Gene View: EDC3
Go to UniProtKB:  Q96F86
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL
Download SDF File 
Download CCD File 
A, C
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.210 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 46.920α = 90.00
b = 80.460β = 90.00
c = 110.310γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
PHASERphasing
XSCALEdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-03-24
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance