6I6B

Crystal structure of the KDEL receptor in the peptide free state.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.59 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.242 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis for pH-dependent retrieval of ER proteins from the Golgi by the KDEL receptor.

Brauer, P.Parker, J.L.Gerondopoulos, A.Zimmermann, I.Seeger, M.A.Barr, F.A.Newstead, S.

(2019) Science 363: 1103-1107

  • DOI: 10.1126/science.aaw2859
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Selective export and retrieval of proteins between the endoplasmic reticulum (ER) and Golgi apparatus is indispensable for eukaryotic cell function. An essential step in the retrieval of ER luminal proteins from the Golgi is the pH-dependent recognit ...

    Selective export and retrieval of proteins between the endoplasmic reticulum (ER) and Golgi apparatus is indispensable for eukaryotic cell function. An essential step in the retrieval of ER luminal proteins from the Golgi is the pH-dependent recognition of a carboxyl-terminal Lys-Asp-Glu-Leu (KDEL) signal by the KDEL receptor. Here, we present crystal structures of the chicken KDEL receptor in the apo ER state, KDEL-bound Golgi state, and in complex with an antagonistic synthetic nanobody (sybody). These structures show a transporter-like architecture that undergoes conformational changes upon KDEL binding and reveal a pH-dependent interaction network crucial for recognition of the carboxyl terminus of the KDEL signal. Complementary in vitro binding and in vivo cell localization data explain how these features create a pH-dependent retrieval system in the secretory pathway.


    Organizational Affiliation

    Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ER lumen protein-retaining receptor 2
A
203Gallus gallusMutation(s): 0 
Gene Names: KDELR2
Find proteins for Q5ZKX9 (Gallus gallus)
Go to Gene View: KDELR2
Go to UniProtKB:  Q5ZKX9
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
OLC
Query on OLC

Download SDF File 
Download CCD File 
A
(2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate
1-Oleoyl-R-glycerol
C21 H40 O4
RZRNAYUHWVFMIP-GDCKJWNLSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.59 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.242 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 47.899α = 90.00
b = 103.750β = 90.00
c = 101.588γ = 90.00
Software Package:
Software NamePurpose
DIALSdata reduction
PDB_EXTRACTdata extraction
xia2data scaling
PHENIXrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom109133/Z/15/A

Revision History 

  • Version 1.0: 2019-02-27
    Type: Initial release
  • Version 1.1: 2019-03-06
    Type: Data collection, Database references
  • Version 1.2: 2019-03-20
    Type: Data collection, Database references