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Bridge-Induced Chromosome Translocation in Yeast Relies upon a Rad54/Rdh54-Dependent, Pol32-Independent Pathway [Elektronski vir]Tosato, Valentina ; Sidari, Sabrina ; Bruschi, Carlo V.While in mammalian cells the genetic determinism of chromosomal translocation remains unclear, the yeast Saccharomyces cerevisiae has become an ideal model system to generate ad hoc translocations ... and analyze their cellular and molecular outcome. A linear DNA cassette carrying a selectable marker flanked by perfect homologies to two chromosomes triggers a bridge-induced translocation (BIT) in budding yeast, with variable efficiency. A postulated two-step process to produce BIT translocants is based on the cooperation between the Homologous Recombination System (HRS) and Break-Induced Replication (BIR); however, a clear indication of the molecular factors underlying the genetic mechanism is still missing. In this work we provide evidence that BIT translocation is elicited by the Rad54 helicase and completed by a Pol32-independent replication pathway. Our results demonstrate also that Rdh54 is involved in the stability of the translocants, suggesting a mitotic role in chromosome pairing and segregation. Moreover, when RAD54 is over-expressed, an ensemble of secondary rearrangements between repeated DNA tracts arise after the initial translocation event, leading to severe aneuploidy with loss of genetic material, which prompts the identification of fragile sites within the yeast genome.Source: PloS one [Elektronski vir]. - ISSN 1932-6203 (Vol. 8, iss. 1, e60926, Apr. 2013, str. 1-17)Type of material - e-articlePublish date - 2013Language - englishCOBISS.SI-ID - 1538205892
Author
Tosato, Valentina |
Sidari, Sabrina |
Bruschi, Carlo V.
Topics
translocations |
chromosomes |
genetic loci |
probe hydralization |
cloning |
tanslokacije |
kromosomi |
kloniranje |
hibridizacija
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Tosato, Valentina | ![]() |
Sidari, Sabrina | ![]() |
Bruschi, Carlo V. | ![]() |
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