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- W2116826427 abstract "Genomes contain tandem repeat blocks that are at risk of expansion or contraction. The mechanisms of destabilization of the human minisatellite CEB1 (arrays of 36- to 43-bp repeats) were investigated in a previously developed model system, in which CEB1-0.6 (14 repeats) and CEB1-1.8 (42 repeats) alleles were inserted into the genome of Saccharomyces cerevisiae. As in human cells, CEB1 is stable in mitotically growing yeast cells but is frequently rearranged in the absence of the Rad27/hFEN1 protein involved in Okazaki fragments maturation. To gain insight into this mode of destabilization, the CEB1-1.8 and CEB1-0.6 human alleles and 47 rearrangements derived from a CEB1-1.8 progenitor in rad27Delta cells were sequenced. A high degree of polymorphism of CEB1 internal repeats was observed, attesting to a large variety of homology-driven rearrangements. Simple deletion, double deletion, and highly complex events were observed. Pedigree analysis showed that all rearrangements, even the most complex, occurred in a single generation and were inherited equally by mother and daughter cells. Finally, the rearrangement frequency was found to increase with array size, and partial complementation of the rad27Delta mutation by hFEN1 demonstrated that the production of novel CEB1 alleles is Rad52 and Rad51 dependent. Instability can be explained by an accumulation of unresolved flap structures during replication, leading to the formation of recombinogenic lesions and faulty repair, best understood by homology-dependent synthesis-strand displacement and annealing." @default.
- W2116826427 created "2016-06-24" @default.
- W2116826427 creator A5016801869 @default.
- W2116826427 creator A5066676166 @default.
- W2116826427 creator A5088349709 @default.
- W2116826427 date "2006-09-01" @default.
- W2116826427 modified "2023-10-18" @default.
- W2116826427 title "Complex Minisatellite Rearrangements Generated in the Total or Partial Absence of Rad27<i>/</i>hFEN1 Activity Occur in a Single Generation and Are Rad51 and Rad52 Dependent" @default.
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- W2116826427 doi "https://doi.org/10.1128/mcb.00649-06" @default.
- W2116826427 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/1592832" @default.
- W2116826427 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/16914748" @default.
- W2116826427 hasPublicationYear "2006" @default.
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