1KRH

X-ray Structure of Benzoate Dioxygenase Reductase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.241 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

X-ray crystal structure of benzoate 1,2-dioxygenase reductase from Acinetobacter sp. strain ADP1.

Karlsson, A.Beharry, Z.M.Matthew Eby, D.Coulter, E.D.Neidle, E.L.Kurtz Jr., D.M.Eklund, H.Ramaswamy, S.

(2002) J.Mol.Biol. 318: 261-272

  • DOI: 10.1016/S0022-2836(02)00039-6

  • PubMed Abstract: 
  • One of the major processes for aerobic biodegradation of aromatic compounds is initiated by Rieske dioxygenases. Benzoate dioxygenase contains a reductase component, BenC, that is responsible for the two-electron transfer from NADH via FAD and an iro ...

    One of the major processes for aerobic biodegradation of aromatic compounds is initiated by Rieske dioxygenases. Benzoate dioxygenase contains a reductase component, BenC, that is responsible for the two-electron transfer from NADH via FAD and an iron-sulfur cluster to the terminal oxygenase component. Here, we present the structure of BenC from Acinetobacter sp. strain ADP1 at 1.5 A resolution. BenC contains three domains, each binding a redox cofactor: iron-sulfur, FAD and NADH, respectively. The [2Fe-2S] domain is similar to that of plant ferredoxins, and the FAD and NADH domains are similar to members of the ferredoxin:NADPH reductase superfamily. In phthalate dioxygenase reductase, the only other Rieske dioxygenase reductase for which a crystal structure is available, the ferredoxin-like and flavin binding domains are sequentially reversed compared to BenC. The BenC structure shows significant differences in the location of the ferredoxin domain relative to the other domains, compared to phthalate dioxygenase reductase and other known systems containing these three domains. In BenC, the ferredoxin domain interacts with both the flavin and NAD(P)H domains. The iron-sulfur center and the flavin are about 9 A apart, which allows a fast electron transfer. The BenC structure is the first determined for a reductase from the class IB Rieske dioxygenases, whose reductases transfer electrons directly to their oxygenase components. Based on sequence similarities, a very similar structure was modeled for the class III naphthalene dioxygenase reductase, which transfers electrons to an intermediary ferredoxin, rather than the oxygenase component.


    Organizational Affiliation

    Department of Molecular Biology, Swedish University of Agricultural Sciences, Box 590, BMC, S-751 24 Uppsala, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Benzoate 1,2-Dioxygenase Reductase
A, B
338Acinetobacter baylyi (strain ATCC 33305 / BD413 / ADP1)Mutation(s): 0 
Gene Names: benC
EC: 1.18.1.3
Find proteins for P07771 (Acinetobacter baylyi (strain ATCC 33305 / BD413 / ADP1))
Go to UniProtKB:  P07771
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

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

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

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.241 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 94.093α = 90.00
b = 100.682β = 90.00
c = 153.541γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
SOLVEphasing
REFMACrefinement
SCALEPACKdata scaling
DMmodel building
DMphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-05-15
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-02-01
    Type: Structure summary
  • Version 1.4: 2017-10-11
    Type: Advisory, Refinement description