5E37

Redox protein from Chlamydomonas reinhardtii


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.199 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Calredoxin represents a novel type of calcium-dependent sensor-responder connected to redox regulation in the chloroplast

Hochmal, A.K.Zinzius, K.Charoenwattanasatien, R.Gabelein, P.Mutoh, R.Tanaka, H.Schulze, S.Liu, G.Scholz, M.Nordhues, A.Offenborn, J.N.Petroutsos, D.Finazzi, G.Fufezan, C.Huang, K.Kurisu, G.Hippler, M.

(2016) Nat Commun 7: 11847-11847

  • DOI: 10.1038/ncomms11847

  • PubMed Abstract: 
  • Calcium (Ca(2+)) and redox signalling play important roles in acclimation processes from archaea to eukaryotic organisms. Herein we characterized a unique protein from Chlamydomonas reinhardtii that has the competence to integrate Ca(2+)- and redox-r ...

    Calcium (Ca(2+)) and redox signalling play important roles in acclimation processes from archaea to eukaryotic organisms. Herein we characterized a unique protein from Chlamydomonas reinhardtii that has the competence to integrate Ca(2+)- and redox-related signalling. This protein, designated as calredoxin (CRX), combines four Ca(2+)-binding EF-hands and a thioredoxin (TRX) domain. A crystal structure of CRX, at 1.6 Å resolution, revealed an unusual calmodulin-fold of the Ca(2+)-binding EF-hands, which is functionally linked via an inter-domain communication path with the enzymatically active TRX domain. CRX is chloroplast-localized and interacted with a chloroplast 2-Cys peroxiredoxin (PRX1). Ca(2+)-binding to CRX is critical for its TRX activity and for efficient binding and reduction of PRX1. Thereby, CRX represents a new class of Ca(2+)-dependent 'sensor-responder' proteins. Genetically engineered Chlamydomonas strains with strongly diminished amounts of CRX revealed altered photosynthetic electron transfer and were affected in oxidative stress response underpinning a function of CRX in stress acclimation.


    Organizational Affiliation

    Institut National Recherche Agronomique, UMR1200, F-38054 Grenoble, France.,Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei 430072, China.,Institute for Protein Research, Osaka University, Suita Osaka 565-0871, Japan.,Institute of Plant Biology and Biotechnology, University of Münster, 48143 Münster, Germany.,Commissariat à l'Energie Atomique et Energies Alternatives, l'Institut de Recherches en Technologies et Sciences pour le Vivant, F-38054 Grenoble, France.,Université Grenoble 1, F-38041 Grenoble, France.,Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), Saitama 332-0012, Japan.,Centre National Recherche Scientifique, Unité Mixte Recherche 5168, Laboratoire Physiologie Cellulaire et Végétale, F-38054 Grenoble, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
EF-Hand domain-containing thioredoxin
A, C
356Chlamydomonas reinhardtiiMutation(s): 0 
Find proteins for A8IXH4 (Chlamydomonas reinhardtii)
Go to UniProtKB:  A8IXH4
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A, C
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.199 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 85.960α = 90.00
b = 55.190β = 101.00
c = 89.580γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
REFMACrefinement
HKL-2000data scaling
PHENIXphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Funding Program for Next Generation World-Leading Researchers from the Cabinet Office of JapanJapanGS016
International Joint Research Promotion Program and International Collaborative Research Program, Osaka UniversityJapan--

Revision History 

  • Version 1.0: 2016-06-22
    Type: Initial release
  • Version 1.1: 2016-06-29
    Type: Database references