2WX3

Asymmetric trimer of the human DCP1a C-terminal domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.31 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.208 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Dcp1 Forms Asymmetric Trimers to Assemble Into Active Mrna Decapping Complexes in Metazoa.

Tritschler, F.Braun, J.E.Motz, C.Igreja, C.Haas, G.Truffault, V.Izaurralde, E.Weichenrieder, O.

(2009) Proc.Natl.Acad.Sci.USA 106: 21591

  • DOI: 10.1073/pnas.0909871106
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • DCP1 stimulates the decapping enzyme DCP2, which removes the mRNA 5' cap structure committing mRNAs to degradation. In multicellular eukaryotes, DCP1-DCP2 interaction is stabilized by additional proteins, including EDC4. However, most information on ...

    DCP1 stimulates the decapping enzyme DCP2, which removes the mRNA 5' cap structure committing mRNAs to degradation. In multicellular eukaryotes, DCP1-DCP2 interaction is stabilized by additional proteins, including EDC4. However, most information on DCP2 activation stems from studies in S. cerevisiae, which lacks EDC4. Furthermore, DCP1 orthologs from multicellular eukaryotes have a C-terminal extension, absent in fungi. Here, we show that in metazoa, a conserved DCP1 C-terminal domain drives DCP1 trimerization. Crystal structures of the DCP1-trimerization domain reveal an antiparallel assembly comprised of three kinked alpha-helices. Trimerization is required for DCP1 to be incorporated into active decapping complexes and for efficient mRNA decapping in vivo. Our results reveal an unexpected connectivity and complexity of the mRNA decapping network in multicellular eukaryotes, which likely enhances opportunities for regulating mRNA degradation.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MRNA-DECAPPING ENZYME 1A
A, B, C
51Homo sapiensMutation(s): 0 
Gene Names: DCP1A (SMIF)
EC: 3.-.-.-
Find proteins for Q9NPI6 (Homo sapiens)
Go to Gene View: DCP1A
Go to UniProtKB:  Q9NPI6
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.31 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.208 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 64.750α = 90.00
b = 64.750β = 90.00
c = 103.030γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
autoSHARPphasing
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-12-01
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance