2WL9

Crystal structure of catechol 2,3-dioxygenase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.176 
  • R-Value Work: 0.151 
  • R-Value Observed: 0.152 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Substrate-Binding Mechanism of a Type I Extradiol Dioxygenase.

Cho, H.J.Kim, K.Sohn, S.Y.Cho, H.Y.Kim, K.J.Kim, M.H.Kim, D.Kim, E.Kang, B.S.

(2010) J Biol Chem 285: 34643

  • DOI: 10.1074/jbc.M110.130310
  • Primary Citation of Related Structures:  
    2WL9, 2WL3

  • PubMed Abstract: 
  • A meta-cleavage pathway for the aerobic degradation of aromatic hydrocarbons is catalyzed by extradiol dioxygenases via a two-step mechanism: catechol substrate binding and dioxygen incorporation. The binding of substrate triggers the release of wate ...

    A meta-cleavage pathway for the aerobic degradation of aromatic hydrocarbons is catalyzed by extradiol dioxygenases via a two-step mechanism: catechol substrate binding and dioxygen incorporation. The binding of substrate triggers the release of water, thereby opening a coordination site for molecular oxygen. The crystal structures of AkbC, a type I extradiol dioxygenase, and the enzyme substrate (3-methylcatechol) complex revealed the substrate binding process of extradiol dioxygenase. AkbC is composed of an N-domain and an active C-domain, which contains iron coordinated by a 2-His-1-carboxylate facial triad motif. The C-domain includes a β-hairpin structure and a C-terminal tail. In substrate-bound AkbC, 3-methylcatechol interacts with the iron via a single hydroxyl group, which represents an intermediate stage in the substrate binding process. Structure-based mutagenesis revealed that the C-terminal tail and β-hairpin form part of the substrate binding pocket that is responsible for substrate specificity by blocking substrate entry. Once a substrate enters the active site, these structural elements also play a role in the correct positioning of the substrate. Based on the results presented here, a putative substrate binding mechanism is proposed.


    Organizational Affiliation

    From the School of Life Science and Biotechnology, Kyungpook National University, Daegu 702-701, Korea.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CATECHOL 2,3-DIOXYGENASEABCD305Rhodococcus sp. DK17Mutation(s): 0 
Gene Names: akbC
Find proteins for Q6REQ5 (Rhodococcus sp. DK17)
Explore Q6REQ5 
Go to UniProtKB:  Q6REQ5
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MBD
Query on MBD

Download CCD File 
B, D
3-METHYLCATECHOL
C7 H8 O2
PGSWEKYNAOWQDF-UHFFFAOYSA-N
 Ligand Interaction
GOL
Query on GOL

Download CCD File 
A, D
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
FE
Query on FE

Download CCD File 
A, B, C, D
FE (III) ION
Fe
VTLYFUHAOXGGBS-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.176 
  • R-Value Work: 0.151 
  • R-Value Observed: 0.152 
  • Space Group: P 4
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 102.562α = 90
b = 102.562β = 90
c = 142.132γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
MOLREPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-09-01
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance