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Tactic responses to pollutants and their potential to increase biodegradation efficiency

Lacal, J. ; Reyes‐Darias, J.A. ; García‐Fontana, C. ; Ramos, J.‐L. ; Krell, T.

Journal of applied microbiology, 2013-04, Vol.114 (4), p.923-933 [Periódico revisado por pares]

Oxford: Blackwell

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Título:
Tactic responses to pollutants and their potential to increase biodegradation efficiency
Autor: Lacal, J. ; Reyes‐Darias, J.A. ; García‐Fontana, C. ; Ramos, J.‐L. ; Krell, T.
Assuntos: Bacterial Proteins - metabolism ; Biodegradation ; Biodegradation, Environmental ; Biological and medical sciences ; Biosensing Techniques ; biosensor ; Biosensors ; Biotechnology ; chemoreceptor ; Chemotaxis ; Efficiency ; Environmental Pollutants - metabolism ; Fundamental and applied biological sciences. Psychology ; Hydrocarbons, Aromatic - metabolism ; Ligands ; Methods. Procedures. Technologies ; Microbiology ; Petroleum - metabolism ; Phenotype ; Plasmids ; pollutant ; Pseudomonas putida ; Pseudomonas putida - genetics ; Pseudomonas putida - metabolism ; Pseudomonas putida - physiology ; Receptors, Cell Surface - metabolism ; Various methods and equipments
É parte de: Journal of applied microbiology, 2013-04, Vol.114 (4), p.923-933
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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Descrição: Summary A significant number of bacterial strains are able to use toxic aromatic hydrocarbons as carbon and energy sources. In a number of cases, the evolution of the corresponding degradation pathway was accompanied by the evolution of tactic behaviours either towards or away from these toxic carbon sources. Reports are reviewed which show that a chemoattraction to heterogeneously distributed aromatic pollutants increases the bioavailability of these compounds and their biodegradation efficiency. An extreme form of chemoattraction towards aromatic pollutants, termed ‘hyperchemotaxis’, was described for Pseudomonas putida DOT‐T1E, which is based on the action of the plasmid‐encoded McpT chemoreceptor. Cells with this phenotype were found of being able to approach and of establishing contact with undiluted crude oil samples. Although close McpT homologues are found on other degradation plasmids, the sequence of their ligand‐binding domains does not share significant similarity with that of NahY, the other characterized chemoreceptor for aromatic hydrocarbons. This may suggest the existence of at least two families of chemoreceptors for aromatic pollutants. The use of receptor chimers comprising the ligand‐binding region of McpT for biosensing purposes is discussed.
Editor: Oxford: Blackwell
Idioma: Inglês

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Tactic responses to pollutants and their potential to increase biodegradation efficiency

Lacal, J. ; Reyes‐Darias, J.A. ; García‐Fontana, C. ; Ramos, J.‐L. ; Krell, T.

Oxford: Blackwell

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