5E37

Redox protein from Chlamydomonas reinhardtii


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.200 

wwPDB Validation   3D Report Full Report


This is version 1.2 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
  • Primary Citation of Related Structures:  
    5E37

  • 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-related signalling ...

    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

    Institute of Plant Biology and Biotechnology, University of Münster, 48143 Münster, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
EF-Hand domain-containing thioredoxinA,
B [auth C]
356Chlamydomonas reinhardtiiMutation(s): 0 
Gene Names: CHLREDRAFT_205510
UniProt
Find proteins for A8IXH4 (Chlamydomonas reinhardtii)
Explore A8IXH4 
Go to UniProtKB:  A8IXH4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA8IXH4
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.200 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 85.96α = 90
b = 55.19β = 101
c = 89.58γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
PHENIXphasing

Structure Validation

View Full Validation Report



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  (Full details and data files)

  • Version 1.0: 2016-06-22
    Type: Initial release
  • Version 1.1: 2016-06-29
    Changes: Database references
  • Version 1.2: 2020-02-19
    Changes: Data collection, Derived calculations