alexa A Salmonella detection system using an engineered DNA binding protein that specifically captured a DNA sequence.
Microbiology

Microbiology

Journal of Microbial & Biochemical Technology

Author(s): Takeuchi A, Sode K

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Abstract We have developed a novel method for the detection with high selectivity of a double-stranded DNA fragment using an engineered DNA-binding protein, DnaA IV, a fusion protein of the DNA-binding domain of DnaA and glutathione S-transferase. The DNA fragment detection system is based on DNA-protein interaction and consists of sequence-specific binding of DnaA IV with a DNA fragment containing the DnaA box. DnaA IV, while not capturing other DNA fragments, specifically captured that containing the DnaA box. Because the oriC fragment containing the DnaA box could be specifically amplified by PCR from the genus Salmonella, the DNA fragment detection system was adapted for the detection of Salmonella. The Salmonella detection system using PCR amplification and the engineered DNA-binding protein could distinguish 104 cfu/mL Salmonella from 106 cfu/ mL contaminating bacteria.
This article was published in Anal Chem and referenced in Journal of Microbial & Biochemical Technology

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