Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 51.15 kDa 
• Atom Count: 4141 
• Residue Count: 460 
• Unique protein chains: 1

1CJC

STRUCTURE OF ADRENODOXIN REDUCTASE OF MITOCHONDRIAL P450 SYSTEMS

• DOI: 10.2210/pdb1CJC/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Bos taurus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 1999-04-12 Released: 1999-04-30 
• Deposition Author(s): Ziegler, G.A., Vonrhein, C., Schulz, G.E.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free: 0.223 
• R-Value Work: 0.188 

Literature

The structure of adrenodoxin reductase of mitochondrial P450 systems: electron transfer for steroid biosynthesis.

Ziegler, G.A., Vonrhein, C., Hanukoglu, I., Schulz, G.E.

(1999) J Mol Biol 289: 981-990

• PubMed: 10369776 
• DOI: 10.1006/jmbi.1999.2807
• Primary Citation of Related Structures:  
  1CJC


• PubMed Abstract: 
  

Adrenodoxin reductase is a monomeric 51 kDa flavoenzyme that is involved in the biosynthesis of all steroid hormones. The structure of the native bovine enzyme was determined at 2.8 A resolution, and the structure of the respective recombinant enzyme at 1.7 A resolution. Adrenodoxin reductase receives a two-electron package from NADPH and converts it to two single electrons that are transferred via adrenodoxin to all mitochondrial cytochromes P 450. The structure suggests how the observed flavin semiquinone is stabilized. A striking feature is the asymmetric charge distribution, which most likely controls the approach of the electron carrier adrenodoxin. A model for the interaction is proposed. Adrenodoxin reductase shows clear sequence homology to half a dozen proteins identified in genome analysis projects, but neither sequence nor structural homology to established, functionally related electron transferases. Yet, the structure revealed a relationship to the disulfide oxidoreductases, permitting the assignment of the NADP-binding site.

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Related Citations: 

• Chaperone-assisted expression of authentic bovine adrenodoxin reductase in Escherichia coli.
  Vonrhein, C., Schmidt, U., Ziegler, G.A., Schweiger, S., Hanukoglu, I., Schulz, G.E.
  (1999) FEBS Lett 443: 167

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Organizational Affiliation: 

Albert-Ludwigs-Universität, Albertstrasse 21, Freiburg im Breisgau, D-79104, Germany.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (ADRENODOXIN REDUCTASE)	A	460	Bos taurus	Mutation(s): 0  Gene Names: FDXR, ADXR EC: 1.18.1.6
Find proteins for P08165 (Bos taurus) Explore P08165  Go to UniProtKB:  P08165

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
FAD	A	FLAVIN-ADENINE DINUCLEOTIDE C27 H33 N9 O15 P2 VWWQXMAJTJZDQX-UYBVJOGSSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free: 0.223 
• R-Value Work: 0.188 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 60.81	α = 90
b = 62.53	β = 106.76
c = 78.37	γ = 90

Software Package:

Software Name	Purpose
SHARP	phasing
REFMAC	refinement
MOSFLM	data reduction
CCP4	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1999-04-12 
• Released Date: 1999-04-30 
Deposition Author(s): Ziegler, G.A., Vonrhein, C., Schulz, G.E.

Revision History 

• Version 1.0: 1999-04-30
  Type: Initial release
  
• Version 1.1: 2008-04-26
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2013-04-17
  Changes: Structure summary
• Version 1.4: 2019-11-27
  Changes: Advisory, Data collection, Database references