Comamonas testosteroni BR6020 possesses a single genetic locus for extradiol cleavage of protocatechuate

Article Abstract:

Research shows that the ring cleavage enzyme, Pca 4,5-dioxygenase mediates total biodegradation of aromatic substrates in Comamonas testosteroni BR6020. The clonig experiments involving the protocatechuate (Pca) genes and encoding the enzyme reveal that the whole meta pathway is localized to one locus.

Canada, Statistical Data Included, Genetic aspects, Microbial metabolism, Biodegradation, Scission (Chemistry)

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Regulation of the degradative pathways from 4-toluenesulphonate and 4-toluenecarboxylate to protocatechuate in Comamonas testosteroni T-2

Article Abstract:

Comamonas testosteroni T-2 was grown in salt medium containing pathways for 4-toluenesulphonate/4-toluenecarboxylate. The specific expression of pathway enzymes was constant during growth and went down slowly in the stationary phase. Since 4-toluenesulphonate and 4-sulphobenzyl always coinduced together, they may be co-expressed from one regulatory unit. The synthesis of 4-sulphobenzoate 3,4-dioxygenese is controlled by a separate regulatory unit.

Metabolism, Organosulfur compounds, Organic sulfur compounds, Afferent pathways

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The oxygenase component of the 2-aminobenzenesulfonate dioxygenase system from Alcaligenes sp. strain 0-1

Article Abstract:

Research was conducted to characterize 2-aminobenzenesulfonate 2,3-dioxygenase metabolising the carbon source utilized by Alcaligenes sp. strain 0-1. Results show that the enzyme consists of two components, the oxygenase and the reductase, and the former component purified to 98% homogeneity and sequenced has a molecular weight of 134 kDa.

Observations, Oxidases, Proteins, Bacteria, Aerobic, Aerobic bacteria, Xenobiotics, Sulfones, Protein separation

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