4G5E

2,4,6-Trichlorophenol 4-monooxygenase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.174 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structural and Catalytic Differences between Two FADH(2)-Dependent Monooxygenases: 2,4,5-TCP 4-Monooxygenase (TftD) from Burkholderia cepacia AC1100 and 2,4,6-TCP 4-Monooxygenase (TcpA) from Cupriavidus necator JMP134.

Hayes, R.P.Webb, B.N.Subramanian, A.K.Nissen, M.Popchock, A.Xun, L.Kang, C.

(2012) Int J Mol Sci 13: 9769-9784

  • DOI: 10.3390/ijms13089769

  • PubMed Abstract: 
  • 2,4,5-TCP 4-monooxygenase (TftD) and 2,4,6-TCP 4-monooxygenase (TcpA) have been discovered in the biodegradation of 2,4,5-trichlorophenol (2,4,5-TCP) and 2,4,6-trichlorophenol (2,4,6-TCP). TcpA and TftD belong to the reduced flavin adenine dinucleoti ...

    2,4,5-TCP 4-monooxygenase (TftD) and 2,4,6-TCP 4-monooxygenase (TcpA) have been discovered in the biodegradation of 2,4,5-trichlorophenol (2,4,5-TCP) and 2,4,6-trichlorophenol (2,4,6-TCP). TcpA and TftD belong to the reduced flavin adenine dinucleotide (FADH(2))-dependent monooxygenases and both use 2,4,6-TCP as a substrate; however, the two enzymes produce different end products. TftD catalyzes a typical monooxygenase reaction, while TcpA catalyzes a typical monooxygenase reaction followed by a hydrolytic dechlorination. We have previously reported the 3D structure of TftD and confirmed the catalytic residue, His289. Here we have determined the crystal structure of TcpA and investigated the apparent differences in specificity and catalysis between these two closely related monooxygenases through structural comparison. Our computational docking results suggest that Ala293 in TcpA (Ile292 in TftD) is possibly responsible for the differences in substrate specificity between the two monooxygenases. We have also identified that Arg101 in TcpA could provide inductive effects/charge stabilization during hydrolytic dechlorination. The collective information provides a fundamental understanding of the catalytic reaction mechanism and the parameters for substrate specificity. The information may provide guidance for designing bioremediation strategies for polychlorophenols, a major group of environmental pollutants.


    Organizational Affiliation

    Department of Chemistry, Washington State University, Pullman, WA 99164, USA; E-Mails: robert_hayes@wsu.edu (R.P.H.); brian.webb1@email.wsu.edu (B.N.W.); subramanianarunk@gmail.com (A.K.S.); mnissen@wsu.edu (M.N.).




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
2,4,6-Trichlorophenol 4-monooxygenase
A, B, C, D
517Cupriavidus necator (strain JMP 134 / LMG 1197)Mutation(s): 0 
Find proteins for Q471I2 (Cupriavidus necator (strain JMP 134 / LMG 1197))
Go to UniProtKB:  Q471I2
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.174 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 107.072α = 90.00
b = 180.050β = 97.87
c = 110.197γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
PHENIXrefinement
HKL-2000data scaling
BOSdata collection
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-09-19
    Type: Initial release