Comparison of Different Methods for Total Bacteria RNA extraction
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Abstract:
In this research, RNA was isolated from three bacterial strains, (Escherichia coli, Bacillus subtilis and Lactococcuslactis) by using modified and un-modified Trizol and RNAiso plus methods, Triton X-100 method and Qiagen method. The quality and integrity of the extracted RNA samples were determined with agarose gel electrophoresis, nucleic acid detector and RT-PCR detection. The results demonstrate that un-modified RNAiso plus method can effectively collect high-quality RNA from the three bacterial strains. Qiagen method and un-modified Trizol method showed good efficiency when isolating total RNA from E.coli but other strains. In addition, the RNA samples also contain DNA contamination. L. lactis was more suitable for using Triton X-100 method. With the same principle, modified Trizol method, modified RNAiso plus method and Triton X-100 method reported here can be employed for extraction of RNA that are free from 16S and 23S rRNA and provide simple, rapid and effective tools for the isolation of high-quality RNA appropriate for downstream molecular experiments
