Genome-destabilizing and mutagenic effects of break-induced replication in Saccharomyces cerevisiae

作者: Angela Kay Deem

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摘要: Deem, Angela Kay Ph.D., Purdue University, May 2011. Genome-destabilizing and Mutagenic Effects of Break-induced Replication in Saccharomyces cerevisiae. Major Professor: Cynthia V. Stauffacher. DNA suffers constant damage, leading to a variety lesions that require repair. One the most devastating is double-strand break (DSB), which results physical dissociation two pieces chromosome. Necessarily, cells have evolved number DSB repair mechanisms. mechanism break-induced replication (BIR), involves invasion one side broken chromosome into homologous template, followed by copying donor molecule through telomeric sequences. BIR an important cellular process implicated restart collapsed forks, as well various chromosomal instabilities. Furthermore, uniquely combines processive involving fork with This work employs system cerevisiae investigate genetic control, outcomes, frameshift mutagenesis associated initiated controlled HO-endonuclease Mutations POL32, encodes third, non-essential subunit polymerase  (Pol ), RAD9 RAD24, participate damage checkpoint response, resulted defect characterized decreased increased

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