4B6H

Structure of hDcp1a in complex with proline rich sequence of PNRC2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.234 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structural Basis of the Pnrc2-Mediated Link between Mrna Surveillance and Decapping.

Lai, T.Cho, H.Liu, Z.Bowler, M.W.Piao, S.Parker, R.Kim, Y.K.Song, H.

(2012) Structure 20: 2025

  • DOI: 10.1016/j.str.2012.09.009

  • PubMed Abstract: 
  • Nonsense-mediated mRNA decay (NMD) is an important mRNA surveillance system, and human PNRC2 protein mediates the link between mRNA surveillance and decapping. However, the mechanism by which PNRC2 interacts with the mRNA surveillance machinery and s ...

    Nonsense-mediated mRNA decay (NMD) is an important mRNA surveillance system, and human PNRC2 protein mediates the link between mRNA surveillance and decapping. However, the mechanism by which PNRC2 interacts with the mRNA surveillance machinery and stimulates NMD is unknown. Here, we present the crystal structure of Dcp1a in complex with PNRC2. The proline-rich region of PNRC2 is bound to the EVH1 domain of Dcp1a, while its NR-box mediates the interaction with the hyperphosphorylated Upf1. The mode of PNRC2 interaction with Dcp1a is distinct from those observed in other EVH1/proline-rich ligands interactions. Disruption of the interaction of PNRC2 with Dcp1a abolishes its P-body localization and ability to promote mRNA degradation when tethered to mRNAs. PNRC2 acts in synergy with Dcp1a to stimulate the decapping activity of Dcp2 by bridging the interaction between Dcp1a and Dcp2, suggesting that PNRC2 is a decapping coactivator in addition to its adaptor role in NMD.


    Organizational Affiliation

    Institute of Molecular and Cell Biology, 61 Biopolis Drive, Singapore 138673.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MRNA-DECAPPING ENZYME 1A
A, B
134Homo sapiensMutation(s): 0 
Gene Names: DCP1A (SMIF)
EC: 3.-.-.-
Find proteins for Q9NPI6 (Homo sapiens)
Go to Gene View: DCP1A
Go to UniProtKB:  Q9NPI6
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
PROLINE-RICH NUCLEAR RECEPTOR COACTIVATOR 2
C, D
135Homo sapiensMutation(s): 0 
Gene Names: PNRC2
Find proteins for Q9NPJ4 (Homo sapiens)
Go to Gene View: PNRC2
Go to UniProtKB:  Q9NPJ4
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.234 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 76.091α = 90.00
b = 97.639β = 90.00
c = 109.688γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling
SnBphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2012-08-13 
  • Released Date: 2013-03-06 
  • Deposition Author(s): Lai, T., Song, H.

Revision History 

  • Version 1.0: 2013-03-06
    Type: Initial release