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Information on EC 1.21.4.5 - tetrachlorohydroquinone reductive dehalogenase

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IUBMB Comments
The enzyme, characterized from the bacterium Sphingobium chlorophenolicum, converts tetrachlorohydroquinone to 2,6-dichlorohydroquinone in two steps, via 2,3,6-trichlorohydroquinone, using glutathione as the reducing agent. The enzyme is sensitive to oxidation - when an internal L-cysteine residue is oxidized, the enzyme produces 2,3,5-trichloro-6-(glutathion-S-yl)-hydroquinone and 2,6-dichloro-3-(glutathion-S-yl)-hydroquinone instead of its normal products.
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The expected taxonomic range for this enzyme is: Sphingomonadaceae
Synonyms
PCP hydroxylase, pcpC, TCHQ dehalogenase, tetrachloro-p-hydroquinone reductive dehalogenase, tetrachlorohydroquinone dehalogenase, tetrachlorohydroquinone reductive dehalogenase, more
REACTION
REACTION DIAGRAM
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ORGANISM
UNIPROT
LITERATURE
2,3,6-trichlorohydroquinone + Cl- + glutathione disulfide = 2,3,5,6-tetrachlorohydroquinone + 2 glutathione
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(2)
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2,6-dichlorohydroquinone + Cl- + glutathione disulfide = 2,3,6-trichlorohydroquinone + 2 glutathione
show the reaction diagram
(1)
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