Arrangement and regulation of the genes for meta-pathway enzymes required for degradation of phenol in Comamonas testosteroni TA441

Article Abstract:

Research has been conducted on the Comamonas testosteroni which degrades phenol. Results indicate that gene cluster aphCEFGHJI is downstream of the aphK operon.

Analysis, Enzymes

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Pseudomonas putida DE2010 can degrade biphenyl by a mosaic pathway encoded by the tod operon and cmtE, which are identical to those of P. putida F1 except for a single base difference in the operator-promoter region of the cmt operon

Article Abstract:

Pseudomonas putida DE2010 has been found to be able to degrade biphenyl by a mosaic pathway encoded by the tod operon and cmtE. They are identical to those of P. putida F1 except for one base different in the operator-promoter region of the cmt operon. Results of study show that cmtE is not effectively repressed by CymR in strain CE2010, leading to low constitutive expression and, as a result, low growth on biphenyl

United Kingdom, Physiological aspects, Environmental aspects, Bacteria, Bioremediation, Microbial enzymes, Pseudomonas putida, Aromatic compounds

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Adaptationof Comamonas testosteroni TA441 to utilize phenol: Organization and regulation of the genes involved in phenol degradation

Article Abstract:

Comamonas testosteroni TA441 was able to utilize phenol following a 2-3 week incubation in a phenol containing medium. Phenol hydroxylase (PH) and catechol 2,3-dioxygenase (C230) were highly induced by phenol and an adapted strain P1, indicating that phenol was degraded through the meta-pathway. An aphR mutant strain of P1 could be grown on phenol after transformation with a recombinant aphR gene, although TA441 could not.

Observations

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