4A53

Structural basis of the Dcp1:Dcp2 mRNA decapping complex activation by Edc3 and Scd6


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST ENERGY 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

The Structural Basis of Edc3- and Scd6-Mediated Activation of the Dcp1:Dcp2 Mrna Decapping Complex.

Fromm, S.A.Truffault, V.Kamenz, J.Braun, J.E.Hoffmann, N.A.Izaurralde, E.Sprangers, R.

(2011) Embo J. 31: 279

  • DOI: 10.1038/emboj.2011.408
  • Primary Citation of Related Structures:  4A54

  • PubMed Abstract: 
  • The Dcp1:Dcp2 decapping complex catalyses the removal of the mRNA 5' cap structure. Activator proteins, including Edc3 (enhancer of decapping 3), modulate its activity. Here, we solved the structure of the yeast Edc3 LSm domain in complex with a shor ...

    The Dcp1:Dcp2 decapping complex catalyses the removal of the mRNA 5' cap structure. Activator proteins, including Edc3 (enhancer of decapping 3), modulate its activity. Here, we solved the structure of the yeast Edc3 LSm domain in complex with a short helical leucine-rich motif (HLM) from Dcp2. The motif interacts with the monomeric Edc3 LSm domain in an unprecedented manner and recognizes a noncanonical binding surface. Based on the structure, we identified additional HLMs in the disordered C-terminal extension of Dcp2 that can interact with Edc3. Moreover, the LSm domain of the Edc3-related protein Scd6 competes with Edc3 for the interaction with these HLMs. We show that both Edc3 and Scd6 stimulate decapping in vitro, presumably by preventing the Dcp1:Dcp2 complex from adopting an inactive conformation. In addition, we show that the C-terminal HLMs in Dcp2 are necessary for the localization of the Dcp1:Dcp2 decapping complex to P-bodies in vivo. Unexpectedly, in contrast to yeast, in metazoans the HLM is found in Dcp1, suggesting that details underlying the regulation of mRNA decapping changed throughout evolution.


    Organizational Affiliation

    Max Planck Institute for Developmental Biology, Tübingen, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
EDC3
A
125Schizosaccharomyces pombe (strain 972 / ATCC 24843)Gene Names: edc3
Find proteins for O94752 (Schizosaccharomyces pombe (strain 972 / ATCC 24843))
Go to UniProtKB:  O94752
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST ENERGY 
  • Olderado: 4A53 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-02-01
    Type: Initial release