We have found that genetic information can flow from RNA to DNA in a homology-driven manner, from cellular RNA to a homologous DNA sequence," said Francesca Storici, an associate professor in the School of Biology at the Georgia Institute of Technology and senior author of the paper. "This process is moving the genetic information in the opposite direction from which it normally flows. We have shown that when an endogenous RNA molecule can anneal to broken homologous DNA without being removed, the RNA can repair the damaged DNA. This finding reveals the existence of a novel mechanism of genetic recombination."
Most newly-transcribed RNA is quickly exported from the nucleus to the cytoplasm of cells to perform its many essential roles in gene coding and expression, and in regulation of cell operations. Generally, RNA is kept away from – or removed from – nuclear DNA. In fact, it is known that annealing of RNA with complementary chromosomal DNA is dangerous for cells because it may impair transcription elongation and DNA replication, promoting genome instability.
We have found that genetic information can flow from RNA to DNA in a homology-driven manner, from cellular RNA to a homologous DNA sequence," said Francesca Storici, an associate professor in the School of Biology at the Georgia Institute of Technology and senior author of the paper. "This process is moving the genetic information in the opposite direction from which it normally flows. We have shown that when an endogenous RNA molecule can anneal to broken homologous DNA without being removed, the RNA can repair the damaged DNA. This finding reveals the existence of a novel mechanism of genetic recombination."
Most newly-transcribed RNA is quickly exported from the nucleus to the cytoplasm of cells to perform its many essential roles in gene coding and expression, and in regulation of cell operations. Generally, RNA is kept away from – or removed from – nuclear DNA. In fact, it is known that annealing of RNA with complementary chromosomal DNA is dangerous for cells because it may impair transcription elongation and DNA replication, promoting genome instability.
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