4B6H

Structure of hDcp1a in complex with proline rich sequence of PNRC2

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.239 

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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
  • Primary Citation of Related Structures:  
    4B6H

  • 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 stimulates NMD is unknown ...

    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
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
MRNA-DECAPPING ENZYME 1A A, B134Homo sapiensMutation(s): 0 
Gene Names: DCP1A, SMIF
EC: 3
Find proteins for Q9NPI6 (Homo sapiens)
Explore Q9NPI6 
Go to UniProtKB:  Q9NPI6
NIH Common Fund Data Resources
PHAROS:  Q9NPI6
GTEx:  ENSG00000272886
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PROLINE-RICH NUCLEAR RECEPTOR COACTIVATOR 2 C, D135Homo sapiensMutation(s): 0 
Gene Names: PNRC2, HSPC208
Find proteins for Q9NPJ4 (Homo sapiens)
Explore Q9NPJ4 
Go to UniProtKB:  Q9NPJ4
NIH Common Fund Data Resources
PHAROS:  Q9NPJ4
GTEx:  ENSG00000189266
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.239 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 76.091α = 90
b = 97.639β = 90
c = 109.688γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling
SnBphasing

Structure Validation

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Entry History 

Deposition Data

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

Revision History  (Full details and data files)

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