N6-methyladenosine regulates the stability of RNA:DNA hybrids in human cells

R-loops are nucleic acid structures formed by an RNA:DNA hybrid and unpaired single-stranded DNA that represent a source of genomic instability in mammalian cells 1 – 4 . Here we show that N 6 -methyladenosine (m 6 A) modification, contributing to different aspects of messenger RNA metabolism 5 , 6...

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Veröffentlicht in:Nature genetics 2020, Vol.52 (1), p.48-55
Hauptverfasser: Abakir, Abdulkadir, Giles, Tom C., Cristini, Agnese, Foster, Jeremy M., Dai, Nan, Starczak, Marta, Rubio-Roldan, Alejandro, Li, Miaomiao, Eleftheriou, Maria, Crutchley, James, Flatt, Luke, Young, Lorraine, Gaffney, Daniel J., Denning, Chris, Dalhus, Bjørn, Emes, Richard D., Gackowski, Daniel, Corrêa, Ivan R., Garcia-Perez, Jose L., Klungland, Arne, Gromak, Natalia, Ruzov, Alexey
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container_issue 1
container_start_page 48
container_title Nature genetics
container_volume 52
creator Abakir, Abdulkadir
Giles, Tom C.
Cristini, Agnese
Foster, Jeremy M.
Dai, Nan
Starczak, Marta
Rubio-Roldan, Alejandro
Li, Miaomiao
Eleftheriou, Maria
Crutchley, James
Flatt, Luke
Young, Lorraine
Gaffney, Daniel J.
Denning, Chris
Dalhus, Bjørn
Emes, Richard D.
Gackowski, Daniel
Corrêa, Ivan R.
Garcia-Perez, Jose L.
Klungland, Arne
Gromak, Natalia
Ruzov, Alexey
description R-loops are nucleic acid structures formed by an RNA:DNA hybrid and unpaired single-stranded DNA that represent a source of genomic instability in mammalian cells 1 – 4 . Here we show that N 6 -methyladenosine (m 6 A) modification, contributing to different aspects of messenger RNA metabolism 5 , 6 , is detectable on the majority of RNA:DNA hybrids in human pluripotent stem cells. We demonstrate that m 6 A-containing R-loops accumulate during G 2 /M and are depleted at G 0 /G 1 phases of the cell cycle, and that the m 6 A reader promoting mRNA degradation, YTHDF2 (ref. 7 ), interacts with R-loop-enriched loci in dividing cells. Consequently, YTHDF2 knockout leads to increased R-loop levels, cell growth retardation and accumulation of γH2AX, a marker for DNA double-strand breaks, in mammalian cells. Our results suggest that m 6 A regulates accumulation of R-loops, implying a role for this modification in safeguarding genomic stability. N 6 -methyladenosine (m 6 A) is prevalent at RNA:DNA hybrids in human pluripotent stem cells. The m 6 A reader YTHDF2 interacts with R-loop-enriched loci in dividing cells, and YTHDF2 loss leads to increased R-loop levels and accumulation of γH2AX.
doi_str_mv 10.1038/s41588-019-0549-x
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Here we show that N 6 -methyladenosine (m 6 A) modification, contributing to different aspects of messenger RNA metabolism 5 , 6 , is detectable on the majority of RNA:DNA hybrids in human pluripotent stem cells. We demonstrate that m 6 A-containing R-loops accumulate during G 2 /M and are depleted at G 0 /G 1 phases of the cell cycle, and that the m 6 A reader promoting mRNA degradation, YTHDF2 (ref. 7 ), interacts with R-loop-enriched loci in dividing cells. Consequently, YTHDF2 knockout leads to increased R-loop levels, cell growth retardation and accumulation of γH2AX, a marker for DNA double-strand breaks, in mammalian cells. Our results suggest that m 6 A regulates accumulation of R-loops, implying a role for this modification in safeguarding genomic stability. N 6 -methyladenosine (m 6 A) is prevalent at RNA:DNA hybrids in human pluripotent stem cells. 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source Nature; SpringerLink Journals - AutoHoldings
subjects 631/208/176
631/208/191
631/208/200
631/337/176
631/337/2019
Accumulation
Adenosine
Agriculture
Animal Genetics and Genomics
Biomedical and Life Sciences
Biomedicine
Cancer Research
Cell cycle
Chromatography
Deoxyribonucleic acid
DNA
DNA damage
DNA methylation
Experiments
Gene Function
Genomes
Genomic instability
Growth rate
Human Genetics
Hybrids
Letter
Mammalian cells
Mammals
Mass spectrometry
mRNA
N6-methyladenosine
Nucleic acids
Pluripotency
Proteins
R-loops
Ribonucleic acid
RNA
Scientific imaging
Single-stranded DNA
Stability
Stem cells
title N6-methyladenosine regulates the stability of RNA:DNA hybrids in human cells
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