2INC

Native Toluene/o-xylene Monooxygenase Hydroxylase X-ray Crystal Structure

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.199 

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This is version 1.3 of the entry. See complete history. 


Literature

X-ray crystal structures of manganese(II)-reconstituted and native toluene/o-xylene monooxygenase hydroxylase reveal rotamer shifts in conserved residues and an enhanced view of the protein interior.

McCormick, M.S., Sazinsky, M.H., Condon, K.L., Lippard, S.J.

(2006) J Am Chem Soc 128: 15108-15110

  • DOI: 10.1021/ja064837r
  • Primary Citation of Related Structures:  
    2IND, 2INC

  • PubMed Abstract: 

    • We report the X-ray crystal structures of native and manganese(II)-reconstituted toluene/o-xylene monooxygenase hydroxylase (ToMOH) from Pseudomonas stutzeri OX1 to 1.85 and 2.20 A resolution, respectively. The structures reveal that reduction of the dimetallic active site is accompanied by a carboxylate shift and alteration of the coordination environment for dioxygen binding and activation ...

    We report the X-ray crystal structures of native and manganese(II)-reconstituted toluene/o-xylene monooxygenase hydroxylase (ToMOH) from Pseudomonas stutzeri OX1 to 1.85 and 2.20 A resolution, respectively. The structures reveal that reduction of the dimetallic active site is accompanied by a carboxylate shift and alteration of the coordination environment for dioxygen binding and activation. A rotamer shift in a strategically placed asparagine 202 accompanies dimetallic center reduction and is proposed to influence protein component interactions. This rotamer shift is conserved between ToMOH and the corresponding residue in methane monooxygenase hydroxylase (MMOH). Previously unidentified hydrophobic pockets similar to those present in MMOH are assigned.

    Organizational Affiliation: 

    Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Toluene, o-xylene monooxygenase oxygenase subunitA491Pseudomonas stutzeriMutation(s): 0 
Gene Names: touA
Find proteins for O87798 (Pseudomonas stutzeri)
Explore O87798 
Go to UniProtKB:  O87798
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Toluene, o-xylene monooxygenase oxygenase subunitB322Pseudomonas stutzeriMutation(s): 0 
Gene Names: touE
Find proteins for O87802 (Pseudomonas stutzeri)
Explore O87802 
Go to UniProtKB:  O87802
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
TouB proteinC83Pseudomonas stutzeriMutation(s): 0 
Gene Names: touB
Find proteins for O87799 (Pseudomonas stutzeri)
Explore O87799 
Go to UniProtKB:  O87799
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
P6G
Query on P6G
Download Ideal Coordinates CCD File 
 F [auth A]HEXAETHYLENE GLYCOL
C12 H26 O7
IIRDTKBZINWQAW-UHFFFAOYSA-N		 Ligand Interaction
FE
Query on FE
Download Ideal Coordinates CCD File 
 D [auth A], E [auth A]FE (III) ION
Fe
VTLYFUHAOXGGBS-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.199 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 182.555α = 90
b = 182.555β = 90
c = 68.111γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
Blu-Icedata collection
HKL-2000data reduction
HKL-2000data scaling
EPMRphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-11-28
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-18
    Changes: Refinement description