Solution Structure of the LSM Domain of Dm EDC3 (Enhancer of DECAPPING 3)

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 22 
  • Selection Criteria: structures with the lowest energy 

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A divergent Sm fold in EDC3 proteins mediates DCP1 binding and P-body targeting

Tritschler, F.Eulalio, A.Truffault, V.Hartmann, M.D.Helms, S.Schmidt, S.Coles, M.Izaurralde, E.Weichenrieder, O.

(2007) Mol Cell Biol 27: 8600-8611

  • DOI: https://doi.org/10.1128/MCB.01506-07
  • Primary Citation of Related Structures:  
    2RM4, 2VC8

  • PubMed Abstract: 

    Members of the (L)Sm (Sm and Sm-like) protein family are found across all kingdoms of life and play crucial roles in RNA metabolism. The P-body component EDC3 (enhancer of decapping 3) is a divergent member of this family that functions in mRNA decapping. EDC3 is composed of a N-terminal LSm domain, a central FDF domain, and a C-terminal YjeF-N domain. We show that this modular architecture enables EDC3 to interact with multiple components of the decapping machinery, including DCP1, DCP2, and Me31B. The LSm domain mediates DCP1 binding and P-body localization. We determined the three-dimensional structures of the LSm domains of Drosophila melanogaster and human EDC3 and show that the domain adopts a divergent Sm fold that lacks the characteristic N-terminal alpha-helix and has a disrupted beta4-strand. This domain remains monomeric in solution and lacks several features that canonical (L)Sm domains require for binding RNA. The structures also revealed a conserved patch of surface residues that are required for the interaction with DCP1 but not for P-body localization. The conservation of surface and of critical structural residues indicates that LSm domains in EDC3 proteins adopt a similar fold that has separable novel functions that are absent in canonical (L)Sm proteins.

  • Organizational Affiliation

    Max Planck Institute for Developmental Biology, Spemannstrasse 35, D-72076 Tübingen, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
CG6311-PB103Drosophila melanogasterMutation(s): 0 
Gene Names: Edc3CG6311
Find proteins for Q9VVI2 (Drosophila melanogaster)
Explore Q9VVI2 
Go to UniProtKB:  Q9VVI2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9VVI2
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 22 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-10-30
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2022-03-16
    Changes: Data collection, Database references, Derived calculations