Impaired Replication Timing Promotes Tissue-Specific Expression of Common Fragile Sites.

ABSTRACT: Common fragile sites (CFSs) are particularly vulnerable regions of the genome that become visible as breaks, gaps, or constrictions on metaphase chromosomes when cells are under replicative stress. Impairment in DNA replication, late replication timing, enrichment of A/T nucleotides that tend to form secondary structures, the paucity of active or inducible replication origins, the generation of R-loops, and the collision between replication and transcription machineries on particularly long genes are some of the reported characteristics of CFSs that may contribute to their tissue-specific fragility. Here, we validated the induction of two CFSs previously found in the human fetal lung fibroblast line, Medical Research Council cell strain 5 (MRC-5), in another cell line derived

SUBMITTER: Maccaroni K 

PROVIDER: S-EPMC7140878 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature