6EOB

Crystal structure of AMPylated GRP78 in apo form (Crystal form 1)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.238 
  • R-Value Observed: 0.240 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

AMPylation targets the rate-limiting step of BiP's ATPase cycle for its functional inactivation.

Preissler, S.Rohland, L.Yan, Y.Chen, R.Read, R.J.Ron, D.

(2017) Elife 6

  • DOI: 10.7554/eLife.29428
  • Primary Citation of Related Structures:  
    6EOC, 6EOB, 6EOE, 6EOF, 5O4P

  • PubMed Abstract: 
  • The endoplasmic reticulum (ER)-localized Hsp70 chaperone BiP contributes to protein folding homeostasis by engaging unfolded client proteins in a process that is tightly coupled to ATP binding and hydrolysis. The inverse correlation between BiP AMPylation and the burden of unfolded ER proteins suggests a post-translational mechanism for adjusting BiP's activity to changing levels of ER stress, but the underlying molecular details are unexplored ...

    The endoplasmic reticulum (ER)-localized Hsp70 chaperone BiP contributes to protein folding homeostasis by engaging unfolded client proteins in a process that is tightly coupled to ATP binding and hydrolysis. The inverse correlation between BiP AMPylation and the burden of unfolded ER proteins suggests a post-translational mechanism for adjusting BiP's activity to changing levels of ER stress, but the underlying molecular details are unexplored. We present biochemical and crystallographic studies indicating that irrespective of the identity of the bound nucleotide AMPylation biases BiP towards a conformation normally attained by the ATP-bound chaperone. AMPylation does not affect the interaction between BiP and J-protein co-factors but appears to allosterically impair J protein-stimulated ATP-hydrolysis, resulting in the inability of modified BiP to attain high affinity for its substrates. These findings suggest a molecular mechanism by which AMPylation serves as a switch to inactivate BiP, limiting its interactions with substrates whilst conserving ATP.


    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
78 kDa glucose-regulated protein A522Cricetulus griseusMutation(s): 1 
Gene Names: I79_019946HSPA5GRP78
EC: 3.6.4.10
Find proteins for G3I8R9 (Cricetulus griseus)
Explore G3I8R9 
Go to UniProtKB:  G3I8R9
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download Ideal Coordinates CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.238 
  • R-Value Observed: 0.240 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 64.65α = 90
b = 69.07β = 90
c = 122.23γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom200848/Z/16/Z
Wellcome TrustUnited Kingdom082961/Z/07/Z
British Heart FoundationUnited KingdomPG/12/41/29679

Revision History  (Full details and data files)

  • Version 1.0: 2017-11-01
    Type: Initial release
  • Version 1.1: 2017-11-08
    Changes: Structure summary
  • Version 1.2: 2018-11-07
    Changes: Data collection, Source and taxonomy