1E6E

ADRENODOXIN REDUCTASE/ADRENODOXIN COMPLEX OF MITOCHONDRIAL P450 SYSTEMS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.222 

wwPDB Validation 3D Report Full Report


This is version 1.1 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

  • 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 t ...

    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: Struct.,Funct., Genet. 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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
NADPH\:ADRENODOXIN OXIDOREDUCTASE
A, C
460Bos taurusMutation(s): 0 
Gene Names: FDXR (ADXR)
EC: 1.18.1.6
Find proteins for P08165 (Bos taurus)
Go to Gene View: FDXR
Go to UniProtKB:  P08165
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
ADRENODOXIN
B, D
128Bos taurusMutation(s): 1 
Gene Names: FDX1 (ADX)
Find proteins for P00257 (Bos taurus)
Go to Gene View: FDX1
Go to UniProtKB:  P00257
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, C
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
FAD
Query on FAD

Download SDF File 
Download CCD File 
A, C
FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
 Ligand Interaction
FES
Query on FES

Download SDF File 
Download CCD File 
B, D
FE2/S2 (INORGANIC) CLUSTER
Fe2 S2
NIXDOXVAJZFRNF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.222 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 92.210α = 90.00
b = 92.210β = 90.00
c = 607.850γ = 120.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
DENZOdata reduction
CNSphasing
AMoREphasing
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-08-09
    Type: Initial release
  • Version 1.1: 2013-09-18
    Type: Data collection, Derived calculations, Other, Refinement description, Structure summary, Version format compliance