Stable C0T-1 repeat RNA is abundant and is associated with euchromatic interphase chromosomes
Department of Cell and Developmental Biology; School of Medicine
Cell Anatomy | Cell Biology | Genetics | Molecular Genetics
Recent studies recognize a vast diversity of noncoding RNAs with largely unknown functions, but few have examined interspersed repeat sequences, which constitute almost half our genome. RNA hybridization in situ using C0T-1 (highly repeated) DNA probes detects surprisingly abundant euchromatin-associated RNA comprised predominantly of repeat sequences (C0T-1 RNA), including LINE-1. C0T-1-hybridizing RNA strictly localizes to the interphase chromosome territory in cis and remains stably associated with the chromosome territory following prolonged transcriptional inhibition. The C0T-1 RNA territory resists mechanical disruption and fractionates with the nonchromatin scaffold but can be experimentally released. Loss of repeat-rich, stable nuclear RNAs from euchromatin corresponds to aberrant chromatin distribution and condensation. C0T-1 RNA has several properties similar to XIST chromosomal RNA but is excluded from chromatin condensed by XIST. These findings impact two "black boxes" of genome science: the poorly understood diversity of noncoding RNA and the unexplained abundance of repetitive elements.
DOI of Published Version
Hall LL, Carone DM, Gomez AV, Kolpa HJ, Byron M, Mehta N, Fackelmayer FO, Lawrence JB. Stable C0T-1 repeat RNA is abundant and is associated with euchromatic interphase chromosomes. Cell. 2014 Feb 27;156(5):907-19. doi:10.1016/j.cell.2014.01.042. Link to article on publisher's site
Hall, Lisa L.; Carone, Dawn M.; Gomez, Alvin V.; Kolpa, Heather J.; Byron, Meg; Mehta, Nitish; Fackelmayer, Frank O.; and Lawrence, Jeanne B., "Stable C0T-1 repeat RNA is abundant and is associated with euchromatic interphase chromosomes" (2014). Lawrence Lab Publications. 10.