Potential early intermediates in anaerobic benzoate degradation by Rhodopseudomonas palustris

Article Abstract:

The metabolism of benzoate by the nonsulfur phototrophic bacteriumRhodopseudomonas palustris produced cyclohexadienecarboxylates which were detected by gas chromatography/mass spectrometry. These metabolites were formedtogether with methylbenzoate which was produced abundantly. Though produced in low concentrations, these carboxylates were formed in a steady state. This study has characterized the intermediate products involved in the early reductive steps of benzoate degradation but it is yet to be established if these metabolites are true products of anaerobic benzoate metabolism.

Microbial metabolism, Herbicides, Aromatic compounds

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Reductive dehalogenation of halocarboxylic acids by the phototrophic genera Rhodospirillum and Rhodopseudomonas

Article Abstract:

The type strains of Rhodospirillum rubrum, R. photometricum and Rhodopseudomonas palustris can dehalogenize and catabolize low-molecular weight halocarboxylic acids. These purple nonsulfur bacteria thrived on the compounds in the presence of CO2 by reductive dehalogenation and absorption of the resulting acid. This finding show that these bacteria play a significant role in the biodegradation of halogenated compounds in anaerobic sediments.

Environmental aspects, Anaerobic bacteria, Carboxylic acids

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Reductive, coenzyme A-mediated pathway for 3-chlorobenzoate degradation in the phototrophic bacterium Rhodopseudomonas palustris

Article Abstract:

Rhodopseudomonas palustris converts 3-chlorobenzoate to a coenzyme A thioester in order to dechlorinate it. The final result is carbon dioxide and acetyl-CoA, which the bacterium uses as a carbon source.

Dechlorination

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