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Application of fluorescence melting curve analysis for dual DNA detection using single peptide nucleic acid probe
Author(s) -
Ahn Jeong Jin,
Lee Seung Yong,
Hong Ji Young,
Kim Youngjoo,
Kim Gi Won,
Hwang Seung Yong
Publication year - 2015
Publication title -
biotechnology progress
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.572
H-Index - 129
eISSN - 1520-6033
pISSN - 8756-7938
DOI - 10.1002/btpr.2054
Subject(s) - peptide nucleic acid , melting curve analysis , nucleic acid , fluorescence , nucleic acid thermodynamics , dna , peptide , chemistry , melting temperature , hybridization probe , microbiology and biotechnology , gene , biophysics , real time polymerase chain reaction , biology , biochemistry , materials science , base sequence , physics , quantum mechanics , composite material
Peptide nucleic acid (PNA) is an artificially synthesized polymer. PNA oligomers show greater specificity in binding to complementary DNAs. Using this PNA, fluorescence melting curve analysis (FMCA) for dual detection was established. Genomic DNA of Mycoplasma fermentans and Mycoplasma hyorhinis was used as a template DNA model. By using one PNA probe, M. fermentans and M. hyorhinis could be detected and distinguished simultaneously in a single tube. The developed PNA probe is a dual‐labeled probe with fluorescence and quencher dye. The PNA probe perfectly matches the M. fermentans 16s rRNA gene, with a melting temperature of 72°C. On the other hand, the developed PNA probe resulted in a mismatch with the 16s rRNA gene of M. hyorhinis, with a melting temperature of 44–45°C. The melting temperature of M. hyorhinis was 27–28°C lower than that of M. fermentans. Due to PNA's high specificity, this larger melting temperature gap is easy to create. FMCA using PNA offers an alternative method for specific DNA detection. © 2015 American Institute of Chemical Engineers Biotechnol. Prog ., 31:730–735, 2015