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Open Access item Alkane-degrading properties of Dietzia sp. H0B, a key player in the Prestige oil spill biodegradation (NW Spain)
|Keywords:||Alkane degradation, AlkB, Constitutive expression, CYP153, Dietzia, Oil spill, Prestige|
|Publisher:||John Wiley & Sons|
|Citation:||Journal of Applied Microbiology 111(4): 800-810 (2011)|
|Abstract:||Aims: Investigation of the alkane-degrading properties of Dietzia sp. H0B, one of the isolated Corynebacterineae strains that became dominant after the Prestige oil spill.
Methods and Results: Using molecular and chemical analyses, the alkanedegrading
properties of strain Dietzia sp. H0B were analysed. This Grampositive isolate was able to grow on n-alkanes ranging from C12 to C38 and branched alkanes (pristane and phytane). 8-Hexadecene was detected as an
intermediate of hexadecane degradation by Dietzia H0B, suggesting a novel
alkane-degrading pathway in this strain. Three putative alkane hydroxylase
genes (one alkB homologue and two CYP153 gene homologues of cytochrome P450 family) were PCR-amplified from Dietzia H0B and differed from previously known hydroxylase genes, which might be related to the novel degrading activity observed on Dietzia H0B. The alkane degradation activity and the alkB
and CYP153 gene expression were observed constitutively regardless of the
presence of the substrate, suggesting additional, novel pathways for alkane
Conclusions: The results from this study suggest novel alkane-degrading pathways
in Dietzia H0B and a genetic background coding for two different putative
oil-degrading enzymes, which is mostly unexplored and worth to be subject of further functional analysis.
Significance and Impact of the Study: This study increases the scarce information
available about the genetic background of alkane degradation in genus Dietzia and suggests new pathways and novel expression mechanisms of alkane degradation.|
|Publisher version (URL):||http://dx.doi.org/10.1111/j.1365-2672.2011.05104.x|
|Appears in Collections:||(IIM) Artículos|
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