FISH with Padlock Probes Can Efficiently Reveal the Genomic Position of Low or Single-Copy DNA Sequences

Access this Article


    • Matsunaga Sachihiro
    • Department of Applied Biological Science, Faculty of Science and Technology, Tokyo University of Science


<p>A padlock probe is a circularized oligonucleotide containing complementary sequences of target regions. Padlock probes combined with rolling-circle amplification enable fluorescence <i>in situ</i> hybridization (FISH) to reproducibly detect the genomic position of low or single-copy DNA sequences. The FISH with padlock probes revealed that a plant gene cluster of tandemly arrayed three paralogues responsible for photosynthesis rapidly moved from the interior subnuclear region to the peripheral subnuclear region in response to light. Using a pair of peptide nucleic acids as a double-strand opener for the target region, the efficiency of FISH with padlock probes at the detection of a single-copy genomic region was much improved. FISH with padlock probes will give us reliable data of dynamics, arrangement and position of a specific single locus in both the nucleus and the condensed chromosomes.</p>


  • cytologia

    cytologia 82(4), 337-339, 2017

    Japan Mendel Society, International Society of Cytology


Page Top