Toluene-degrading bacteria are chemotactic towards the environmental pollutants benzene, toluene, and trichloroethylene

Article Abstract:

Research documents that it is practical to use bacteria for accelerating bioremediation processes by exploiting chemotactic property of the toluene-degrading bacteria in polluted waters. Data indicate that the chemotactic bacteria sense and swim towards toluene, benzene, and trichloroethylene.

Health aspects, Bioremediation, Organic compounds, Toxicological interactions

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Nitrobenzoates and aminobenzoates are chemoattractants for Pseudomonas strains

Article Abstract:

Results show that both Pseuomonas putida TW3 and P. sp. strain 4NT use the beta-ketoadipate pathway to degrade benzoate. Both are chemotactic to benzoate, nitrobenzoate, and three aminobenzoate isomers in the presence of benzoate in the growth medium. However their chemotactic behavior differs in response to aromatic amino acids.

Nitrated Aromatics, Pseudomonas, Bacterial motility, Nitroaromatic compounds

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Control of substrate specificity by active-site residues in nitrobenzene dioxygenase

Article Abstract:

A study was conducted by using site-directed mutagenesis to modify the active site of nitrobenzene dioxygenase, and the contribution of specific residues in controlling substrate specificity and enzyme performance was evaluated. The specificity of enzymes with substitutions at position 293 varied depending on the residue present and compared to the wild type, the F293Q mutant was 2.5 times faster at oxidizing 2, 6-dinitrotoluene while retaining a similar K(sub m) for the substrate based on product formation rates and whole-cell kinetics.

Science & research, All Other Basic Organic Chemical Manufacturing, Enzymes, Other Basic Organic Chemical Manufacturing, Cyclic crudes and intermediates, Enzymes for Food Processing, Nitrobenzene, Research, Microbiological chemistry, Nitrobenzenes, Chemical properties, Chemical mutagenesis

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