5HQP

Crystal structure of the ERp44-peroxiredoxin 4 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.235 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal Structure of the ERp44-Peroxiredoxin 4 Complex Reveals the Molecular Mechanisms of Thiol-Mediated Protein Retention.

Yang, K.Li, D.F.Wang, X.Liang, J.Sitia, R.Wang, C.C.Wang, X.

(2016) Structure 24: 1755-1765

  • DOI: 10.1016/j.str.2016.08.002

  • PubMed Abstract: 
  • ERp44 controls the localization and transport of diverse proteins in the early secretory pathway. The mechanisms that allow client recognition and the source of the oxidative power for forming intermolecular disulfides are as yet unknown. Here we pre ...

    ERp44 controls the localization and transport of diverse proteins in the early secretory pathway. The mechanisms that allow client recognition and the source of the oxidative power for forming intermolecular disulfides are as yet unknown. Here we present the structure of ERp44 bound to a client, peroxiredoxin 4. Our data reveal that ERp44 binds the oxidized form of peroxiredoxin 4 via thiol-disulfide interchange reactions. The structure explains the redox-dependent recognition and characterizes the essential non-covalent interactions at the interface. The ERp44-Prx4 covalent complexes can be reduced by glutathione and protein disulfide isomerase family members in the ER, allowing the two components to recycle. This work provides insights into the mechanisms of thiol-mediated protein retention and indicates the key roles of ERp44 in this biochemical cycle to optimize oxidative folding and redox homeostasis.


    Organizational Affiliation

    National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China. Electronic address: chihwang@sun5.ibp.ac.cn.,National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China.,National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China. Electronic address: wangxi@moon.ibp.ac.cn.,Divisions of Genetics and Cell Biology, IRCCS Ospedale San Raffaele and Università Vita-Salute San Raffaele, 20132 Milan, Italy.,National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Peroxiredoxin-4
A, B
246Homo sapiensMutation(s): 3 
Gene Names: PRDX4
EC: 1.11.1.15
Find proteins for Q13162 (Homo sapiens)
Go to Gene View: PRDX4
Go to UniProtKB:  Q13162
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Endoplasmic reticulum resident protein 44
C, D
382Homo sapiensMutation(s): 0 
Gene Names: ERP44 (KIAA0573, TXNDC4)
Find proteins for Q9BS26 (Homo sapiens)
Go to Gene View: ERP44
Go to UniProtKB:  Q9BS26
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.235 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 69.289α = 90.00
b = 198.979β = 90.00
c = 225.959γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
PHASERphasing
PHENIXrefinement
iMOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-10-12
    Type: Initial release
  • Version 1.1: 2016-11-16
    Type: Database references