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Construction of long-chain alkane degrading bacteria and its application in bioremediation of crude oil pollution.

08:00 EDT 21st July 2018 | BioPortfolio

Summary of "Construction of long-chain alkane degrading bacteria and its application in bioremediation of crude oil pollution."

In this study, a cloned almA gene was inserted into two plasmids PUC57 and pet-28a (+), and then transformed into Escherichia coli competent strains. The presence of almA was confirmed by PCR combined with restriction enzyme digestion. The results indicated two strains of PUC57/almA-E. coli and pet-28a (+)/almA-E. coli were all functioned on biodegradation long-chain alkanes, however, pet-28a (+)/almA-E. coli strain performed better and the speed of biodegradation was enhanced to about 12 mg L h when compared with PUC57/almA-E. coli strain. Furthermore, degradation degree of n-C32 was much higher than other long-chain alkanes for two engineered E. coli strains. Our results further suggested that exoenzyme was only detected in pet-28a (+)/almA-E. coli and followed a decreasing order of extracellular enzyme > intracellular enzyme > periplasmic enzyme. Besides, co-biodegradation of petroleum hydrocarbons by Pseudomonas sp. B-1, Bacillus subtilis PH-1 with exoenzyme or pet-28a (+)/almA-E. coli posed enormous potential that could reach 70%-80% in oil pollution bioremediation.

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This article was published in the following journal.

Name: International journal of biological macromolecules
ISSN: 1879-0003
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