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- W2804877823 abstract "Helicobacter pylori is an important gastrointestinal pathogen. Its strains possess different levels of powerful restriction modification systems, which are significant barriers to genetic tools used for studying the role of functional genes in its pathogenesis. Methylating vectors in vitro was reported as an alternative to overcome this barrier in several bacteria. In this study we used two H. pylori-E. coli shuttle plasmids and several single/double-crossover homologous recombination gene-targeting plasmids, to test the role of methylation in H. pylori transformation. According to our results, transformants could be obtained only after shuttle plasmids were methylated before transformation. It is helpful in gene complementation and over-expression although at a low frequency. The frequency of gene-targeting transformation was also increased after methylation, especially for the single-crossover recombination plasmids, the transformants of which could only be obtained after methylation. For the double-crossover recombination targeting plasmids, the initial yield of transformants was 0.3-0.8 × 102 CFUs per microgram plasmid DNA. With the help of methylation, the yield was increased to 0.4-1.3 × 102 CFUs per microgram plasmid DNA. These results suggest that in vitro methylation can improve H. pylori transformation by different plasmids, which will benefit the pathogenic mechanism research." @default.
- W2804877823 created "2018-06-01" @default.
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- W2804877823 date "2018-07-01" @default.
- W2804877823 modified "2023-10-17" @default.
- W2804877823 title "Application of methylation in improving plasmid transformation into Helicobacter pylori" @default.
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- W2804877823 doi "https://doi.org/10.1016/j.mimet.2018.05.016" @default.
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