Structure of adrenodoxin reductase at 2.4 Angstrom in crystal form A'

Experimental Data Snapshot

  • Resolution: 2.40 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.201 

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Crystal Structures of Adrenodoxin Reductase in Complex with Nadp+ and Nadph Suggesting a Mechanism for the Electron Transfer of an Enzyme Family

Ziegler, G.A.Schulz, G.E.

(2000) Biochemistry 39: 10986

  • DOI: https://doi.org/10.1021/bi000079k
  • Primary Citation of Related Structures:  
    1E1K, 1E1L, 1E1M, 1E1N

  • PubMed Abstract: 

    Adrenodoxin reductase is a flavoenzyme that shuffles electrons for the biosynthesis of steroids. Its chain topology belongs to the glutathione reductase family of disulfide oxidoreductases, all of which bind FAD at equivalent positions. The three reported structures of adrenodoxin reductase were ligated with reduced and oxidized NADP and have now confirmed this equivalence also for the NADP-binding site. Remarkably, the conformations and relative positions of the prosthetic group FAD and the cofactor NADP have been conserved during protein evolution despite very substantial changes in the polypeptide. The ligated enzymes showed small changes in the domain positions. When compared with the structure of the NADP-free enzyme, these positions correspond to several states of the domain motion during NADP binding. On the basis of the observed structures, we suggest an enzymatic mechanism for the subdivision of the received two-electron package into the two single electrons transferred to the carrier protein adrenodoxin. The data banks contain 10 sequences that are closely related to bovine adrenodoxin reductase. Most of them code for gene products with unknown functions. Within this family, the crucial residues of adrenodoxin reductase are strictly conserved. Moreover, the putative docking site of the carrier is rather well conserved. Five of the family members were assigned names related to ferredoxin:NADP(+) reductase, presumably because adrenodoxin reductase was considered a member of this functionally similar family. Since this is not the case, the data bank entries should be corrected.

  • Organizational Affiliation

    Institut für Organische Chemie und Biochemie, Albert-Ludwigs-Universität, Albertstrasse 21, D-79104 Freiburg im Breisgau, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ADRENODOXIN REDUCTASE460Bos taurusMutation(s): 0 
Find proteins for P08165 (Bos taurus)
Explore P08165 
Go to UniProtKB:  P08165
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP08165
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on FAD

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

Experimental Data

  • Resolution: 2.40 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.201 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.8α = 90
b = 62β = 107.1
c = 83γ = 90
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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-09-24
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-07-05
    Changes: Data collection