1E6E

ADRENODOXIN REDUCTASE/ADRENODOXIN COMPLEX OF MITOCHONDRIAL P450 SYSTEMS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.222 

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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Adrenodoxin Reductase-Adrenodoxin Complex Structure Suggests Electron Transfer Path in Steroid Biosynthesis.

Mueller, J.J.Lapko, A.Bourenkov, G.Ruckpaul, K.Heinemann, U.

(2001) J Biol Chem 276: 2786

  • DOI: 10.1074/jbc.M008501200
  • Primary Citation of Related Structures:  
    1E6E

  • PubMed Abstract: 
  • The steroid hydroxylating system of adrenal cortex mitochondria consists of the membrane-attached NADPH-dependent adrenodoxin reductase (AR), the soluble one-electron transport protein adrenodoxin (Adx), and a membrane-integrated cytochrome P450 of the CYP11 family ...

    The steroid hydroxylating system of adrenal cortex mitochondria consists of the membrane-attached NADPH-dependent adrenodoxin reductase (AR), the soluble one-electron transport protein adrenodoxin (Adx), and a membrane-integrated cytochrome P450 of the CYP11 family. In the 2.3-A resolution crystal structure of the Adx.AR complex, 580 A(2) of partly polar surface are buried. Main interaction sites are centered around Asp(79), Asp(76), Asp(72), and Asp(39) of Adx and around Arg(211), Arg(240), Arg(244), and Lys(27) of AR, respectively. In particular, the region around Asp(39) defines a new protein interaction site for Adx, similar to those found in plant and bacterial ferredoxins. Additional contacts involve the electron transfer region between the redox centers of AR and Adx and C-terminal residues of Adx. The Adx residues Asp(113) to Arg(115) adopt 3(10)-helical conformation and engage in loose intermolecular contacts within a deep cleft of AR. Complex formation is accompanied by a slight domain rearrangement in AR. The [2Fe-2S] cluster of Adx and the isoalloxazine rings of FAD of AR are 10 A apart suggesting a possible electron transfer route between these redox centers. The AR.Adx complex represents the first structure of a biologically relevant complex between a ferredoxin and its reductase.


    Related Citations: 
    • X-Ray Structure of Bovine Adrenodoxin Reductase -Adrenodoxin Complex at 2.5 A Resolution: The First Three-Dimensional Structure of a Complex of Two Components of the Steroidogenic Electron Transport System in Adrenal Cortex Mitochondria
      Mueller, J.J., Lapko, A., Bourenkov, G., Mueller, E.C., Otto, A., Ruckpaul, K., Heinemann, U.
      () To be published --: --
    • Preparation and Crystallization of a Cross-Linked Complex of Bovine Adrenodoxin and Adrenodoxin Reductase
      Lapko, A., Mueller, A., Heese, O., Ruckpaul, K., Heinemann, U.
      (1997) Proteins 28: 289

    Organizational Affiliation

    Max-Delbrück-Centrum für Molekulare Medizin, Robert-Rössle-Strasse 10, D-13125 Berlin, Germany. JJM@MDC-Berlin.de



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
NADPH\:ADRENODOXIN OXIDOREDUCTASEA, C460Bos taurusMutation(s): 0 
Gene Names: FDXRADXR
EC: 1.18.1.2 (PDB Primary Data), 1.18.1.6 (PDB Primary Data)
Membrane Entity: Yes 
UniProt
Find proteins for P08165 (Bos taurus)
Explore P08165 
Go to UniProtKB:  P08165
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
ADRENODOXINB, D128Bos taurusMutation(s): 1 
Gene Names: FDX1ADX
Membrane Entity: Yes 
UniProt
Find proteins for P00257 (Bos taurus)
Explore P00257 
Go to UniProtKB:  P00257
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.222 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.21α = 90
b = 92.21β = 90
c = 607.85γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSphasing
CNSrefinement

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-08-09
    Type: Initial release
  • Version 1.1: 2013-09-18
    Changes: Data collection, Derived calculations, Other, Refinement description, Structure summary, Version format compliance
  • Version 1.2: 2019-04-03
    Changes: Data collection, Experimental preparation, Other
  • Version 1.3: 2019-05-08
    Changes: Data collection, Experimental preparation