4V0V

The crystal structure of mouse PP1G in complex with truncated human PPP1R15B (631-660)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.61 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.176 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

G-actin provides substrate-specificity to eukaryotic initiation factor 2 alpha holophosphatases.

Chen, R.Rato, C.Yan, Y.Crespillo-Casado, A.Clarke, H.J.Harding, H.P.Marciniak, S.J.Read, R.J.Ron, D.

(2015) Elife 4: --

  • DOI: 10.7554/eLife.04871
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Dephosphorylation of eukaryotic translation initiation factor 2a (eIF2a) restores protein synthesis at the waning of stress responses and requires a PP1 catalytic subunit and a regulatory subunit, PPP1R15A/GADD34 or PPP1R15B/CReP. Surprisingly, PPP1R ...

    Dephosphorylation of eukaryotic translation initiation factor 2a (eIF2a) restores protein synthesis at the waning of stress responses and requires a PP1 catalytic subunit and a regulatory subunit, PPP1R15A/GADD34 or PPP1R15B/CReP. Surprisingly, PPP1R15-PP1 binary complexes reconstituted in vitro lacked substrate selectivity. However, selectivity was restored by crude cell lysate or purified G-actin, which joined PPP1R15-PP1 to form a stable ternary complex. In crystal structures of the non-selective PPP1R15B-PP1G complex, the functional core of PPP1R15 made multiple surface contacts with PP1G, but at a distance from the active site, whereas in the substrate-selective ternary complex, actin contributes to one face of a platform encompassing the active site. Computational docking of the N-terminal lobe of eIF2a at this platform placed phosphorylated serine 51 near the active site. Mutagenesis of predicted surface-contacting residues enfeebled dephosphorylation, suggesting that avidity for the substrate plays an important role in imparting specificity on the PPP1R15B-PP1G-actin ternary complex.


    Organizational Affiliation

    Cambridge Institute for Medical Research, University of Cambridge, Cambridge, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SERINE/THREONINE-PROTEIN PHOSPHATASE PP1-GAMMA CATALYTIC SUBUNIT
A, C
295Mus musculusMutation(s): 0 
Gene Names: Ppp1cc
EC: 3.1.3.16
Find proteins for P63087 (Mus musculus)
Go to UniProtKB:  P63087
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
PROTEIN PHOSPHATASE 1 REGULATORY SUBUNIT 15B
B, D
35Homo sapiensMutation(s): 0 
Gene Names: PPP1R15B
Find proteins for Q5SWA1 (Homo sapiens)
Go to Gene View: PPP1R15B
Go to UniProtKB:  Q5SWA1
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN

Download SDF File 
Download CCD File 
A, C
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
NA
Query on NA

Download SDF File 
Download CCD File 
C, D
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.61 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.176 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 66.800α = 90.00
b = 67.890β = 90.00
c = 156.380γ = 90.00
Software Package:
Software NamePurpose
CCP4Iphasing
XDSdata reduction
PHENIXrefinement
Aimlessdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-03-25
    Type: Initial release
  • Version 1.1: 2019-02-27
    Type: Data collection, Database references, Other