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Study on the Mutagenic Effect of Phospholipase A1 Recombinant Plasmid by ARTP |
YANG Jian-wei, XUE Zheng-lian, ZHU Hao, YANG Meng, WANG Zhou |
Institute of Biologic & Chemical Engineering of Anhui Polytechnic University, Microorganism Fermentation Engineering and Technology Research Center of Anhui Province, Wuhu 241000, China |
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Abstract The Atmospheric and Room Temperature Plasma (ARTP) was used to treat the recombinant plasmid pET28a-plaB for the expression of phospholipase A1, agarose gel electrophoresis detection showed that with the prolonging of treatment time, the supercoiled plasmid gradually transformed into open loop and linear structure. Then the treatment of plasmid transformed into host strain BL21, the mutant transformants were detected in particular selective medium, the results show that the processing time is directly proportional to the conversion rate and inversely proportional to the rate of mutation, mutation 60s achieved with the optimal value. Selected of the transformants with large circle diameter to detect its enzyme activity, the results showed that the highest enzyme activity of (12) could reach 12.8 U/ml, which increased to 2.67 times than that of the original strain CK(4.8 U/mL). Blasting the sequence of the two strains, the base mutation rate reached 0.74% and the most was concentrated in A→G and C→T. ARTP has a significant mutagenic effect on the in vitro plasmid.
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Received: 02 December 2016
Published: 25 June 2017
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