TY - JOUR A1 - Inagaki, Hidehito A1 - Ohye, Tamae A1 - Kogo, Hiroshi A1 - Kato, Takema A1 - Bolor, Hasbaira A1 - Taniguchi, Mariko A1 - Shaikh, Tamim H. A1 - Emanuel, Beverly S. A1 - Kurahashi, Hiroki T1 - Chromosomal instability mediated by non-B DNA: Cruciform conformation and not DNA sequence is responsible for recurrent translocation in humans Y1 - 2009/02/01 JF - Genome Research JO - Genome Research SP - 191 EP - 198 DO - 10.1101/gr.079244.108 VL - 19 IS - 2 UR - http://genome.cshlp.org/content/19/2/191.abstract N2 - Chromosomal aberrations have been thought to be random events. However, recent findings introduce a new paradigm in which certain DNA segments have the potential to adopt unusual conformations that lead to genomic instability and nonrandom chromosomal rearrangement. One of the best-studied examples is the palindromic AT-rich repeat (PATRR), which induces recurrent constitutional translocations in humans. Here, we established a plasmid-based model that promotes frequent intermolecular rearrangements between two PATRRs in HEK293 cells. In this model system, the proportion of PATRR plasmid that extrudes a cruciform structure correlates to the levels of rearrangement. Our data suggest that PATRR-mediated translocations are attributable to unusual DNA conformations that confer a common pathway for chromosomal rearrangements in humans. ER -