Crystal structure of Chlamydomonas reinhardtii NADPH Dependent Thioredoxin Reductase 1 domain

Experimental Data Snapshot

  • Resolution: 1.99 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.181 

wwPDB Validation   3D Report Full Report

Ligand Structure Quality Assessment 

This is version 1.2 of the entry. See complete history


Structural analysis revealed a novel conformation of the NTRC reductase domain from Chlamydomonas reinhardtii.

Marchetti, G.M.Fusser, F.Singh, R.K.Brummel, M.Koch, O.Kummel, D.Hippler, M.

(2021) J Struct Biol 214: 107829-107829

  • DOI: https://doi.org/10.1016/j.jsb.2021.107829
  • Primary Citation of Related Structures:  
    7P9D, 7P9E

  • PubMed Abstract: 

    In plant chloroplasts, thiol regulation is driven by two systems. One relies on the activity of thioredoxins through their light dependent reduction by ferredoxin via a ferredoxin-thioredoxin reductase (FTR). In the other system, a NADPH-dependent redox regulation is driven by a NADPH-thioredoxin reductase C (NTRC). While the thioredoxin system has been deeply studied, a more thorough understanding of the function of this plant specific NTRC is desirable. NTRC is a single polypeptide harbouring a thioredoxin domain (Trx) at the C-terminus of a NADPH-dependent Thioredoxin reductase (TrxR). To provide functional and structural insights, we studied the crystal structure of the TrxR domain of the NTRC from Chlamydomonas reinhardtii (CrNTRC, Cre01.g054150.t1.2) and its Cys136Ser (C136S) mutant, which is characterized by the mutation of the resolving cysteine in the active site of the TrxR domain. Furthermore, we confirmed the role of NTRC as electron donor for 2-Cys peroxiredoxin (PRX) also in C. reinhardtii. The structural data of TrxR were employed to develop a scheme of action which addresses electron transfer between TrxR and Trx of NTRC and between NTRC and its substrates.

  • Organizational Affiliation

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

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Thioredoxin reductase487Chlamydomonas reinhardtiiMutation(s): 0 
Gene Names: CHLRE_01g054150v5
Find proteins for A0A2K3E888 (Chlamydomonas reinhardtii)
Explore A0A2K3E888 
Go to UniProtKB:  A0A2K3E888
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A2K3E888
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
FAD (Subject of Investigation/LOI)
Query on FAD

Download Ideal Coordinates CCD File 
C27 H33 N9 O15 P2
Experimental Data & Validation

Experimental Data

  • Resolution: 1.99 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.181 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 85.062α = 90
b = 85.062β = 90
c = 87.053γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report

Ligand Structure Quality Assessment 

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
German Research Foundation (DFG)GermanyHI 739/14.2

Revision History  (Full details and data files)

  • Version 1.0: 2022-01-12
    Type: Initial release
  • Version 1.1: 2022-01-19
    Changes: Database references
  • Version 1.2: 2024-01-31
    Changes: Data collection, Refinement description