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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Dioxygenative cleavage of C-methylated hydroquinones and 2,6-dichlorohydroquinone by Pseudomonas sp. HH35.

The dioxygenolytic catabolism of five C-methylated hydroquinones and 2,6-dichlorohydroquinone in Pseudomonas sp. strain HH35 was elucidated. This organism, which is known to catabolise 2,6-dimethylhydroquinone by 1,2-cleavage, accumulated metabolites from 2-methyl-, 2,3-dimethyl-, 2,5-dimethyl-, 2,3,5-trimethyl- and 2,3,5,6-tetramethylhydroquinone which we isolated and characterised by mass spectrometry and (1)H NMR and UV spectroscopy. The identification of these metabolites defined the impact of methyl groups present in the hydroquinone and showed how each substitution pattern determined the site of the initial enzymic attack. With the exception of the 2,3,5,6-tetramethylhydroquinone, all C-methylated hydroquinones were catabolised by an initial dioxygenolytic cleavage occurring adjacent (1,2- or 3,4-cleavage) to a hydroxy group. In addition, our results indicated that the 2,6-dichlorohydroquinone is catabolised in a similar way by this strain.[1]


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