1V4B

The crystal structure of AzoR (Azo Reductase) from Escherichia coli: Oxidized form


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.194 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Three-dimensional structure of AzoR from Escherichia coli. An oxidereductase conserved in microorganisms

Ito, K.Nakanishi, M.Lee, W.C.Sasaki, H.Zenno, S.Saigo, K.Kitade, Y.Tanokura, M.

(2006) J Biol Chem 281: 20567-20576

  • DOI: 10.1074/jbc.M513345200
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The crystal structure of AzoR (azoreductase) has been determined in complex with FMN for two different crystal forms at 1.8 and 2.2 A resolution. AzoR is an oxidoreductase isolated from Escherichia coli as a protein responsible for the degradation of ...

    The crystal structure of AzoR (azoreductase) has been determined in complex with FMN for two different crystal forms at 1.8 and 2.2 A resolution. AzoR is an oxidoreductase isolated from Escherichia coli as a protein responsible for the degradation of azo compounds. This enzyme is an FMN-dependent NADH-azoreductase and catalyzes the reductive cleavage of azo groups by a ping-pong mechanism. The structure suggests that AzoR acts in a homodimeric state forming the two identical catalytic sites to which both monomers contribute. The structure revealed that each monomer of AzoR has a flavodoxin-like structure, without the explicit overall amino acid sequence homology. Superposition of the structures from the two different crystal forms revealed the conformational change and suggested a mechanism for accommodating substrates of different size. Furthermore, comparison of the active site structure with that of NQO1 complexed with substrates provides clues to the possible substrate-binding mechanism of AzoR.


    Organizational Affiliation

    Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
NADH-azoreductase, FMN-dependentA200Escherichia coliMutation(s): 0 
EC: 1.7.1.6 (PDB Primary Data), 1.7.1.17 (UniProt)
Find proteins for P41407 (Escherichia coli (strain K12))
Explore P41407 
Go to UniProtKB:  P41407
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FMN
Query on FMN

Download CCD File 
A
FLAVIN MONONUCLEOTIDE
C17 H21 N4 O9 P
FVTCRASFADXXNN-SCRDCRAPSA-N
 Ligand Interaction
EDO
Query on EDO

Download CCD File 
A
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
IPA
Query on IPA

Download CCD File 
A
ISOPROPYL ALCOHOL
C3 H8 O
KFZMGEQAYNKOFK-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.194 
  • Space Group: P 42 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.185α = 90
b = 92.185β = 90
c = 51.848γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
CCP4data scaling
SOLVEphasing

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2003-11-12 
  • Released Date: 2005-01-18 
  • Deposition Author(s): Ito, K., Tanokura, M.

Revision History 

  • Version 1.0: 2005-01-18
    Type: Initial release
  • Version 1.1: 2007-09-19
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance