New indicator Escherichia coli strain for rapid and accurate detection of supF mutations

Genes and Environment

Hiroyuki Kamiya¹  Ruriko Fukushima¹  Tetsuya Suzuki¹ 

[1] Graduate School of Biomedical and Health Sciences, Hiroshima University;

关键词: supF mutation assay;    Indicator Escherichia coli strain;    gyrA;    rpsL;   

DOI  :  10.1186/s41021-020-00167-x

来源: DOAJ

【 摘 要 】

Abstract Background The supF gene of Escherichia coli is useful for forward mutation analysis in bacterial and mammalian cells used in mutagenesis and DNA repair studies. Indicator E. coli strains, such as KS40/pOF105, have been used to analyze supF mutations. However, KS40/pOF105 is not enough to select supF mutants on nutrient-rich agar plates. Therefore, in this study, a new indicator E. coli strain for rapid and accurate detection of supF mutations was developed. Results The gyrA and rpsL genes with an amber mutation were integrated into the chromosomal DNA of E. coli KS40 to produce a new indicator strain, RF01. RF01 cells transformed by the wild-type supF gene were sensitive to nalidixic acid and streptomycin on LB agar plates. supF mutant frequencies and mutation spectra in RF01 were similar to those in KS40/pOF105. In addition, some mutations in supF were only detected in RF01. Conclusion RF01 is a new and useful indicator E. coli strain for analyzing supF mutations.

【 授权许可】

Unknown