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The RNA m 6 A landscape of mouse oocytes and preimplantation embryos
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The RNA m 6 A landscape of mouse oocytes and preimplantation embryos
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Journal Article
The RNA m 6 A landscape of mouse oocytes and preimplantation embryos
2023
Overview
Despite the significance of N
-methyladenosine (m
A) in gene regulation, the requirement for large amounts of RNA has hindered m
A profiling in mammalian early embryos. Here we apply low-input methyl RNA immunoprecipitation and sequencing to map m
A in mouse oocytes and preimplantation embryos. We define the landscape of m
A during the maternal-to-zygotic transition, including stage-specifically expressed transcription factors essential for cell fate determination. Both the maternally inherited transcripts to be degraded post fertilization and the zygotically activated genes during zygotic genome activation are widely marked by m
A. In contrast to m
A-marked zygotic ally-activated genes, m
A-marked maternally inherited transcripts have a higher tendency to be targeted by microRNAs. Moreover, RNAs derived from retrotransposons, such as MTA that is maternally expressed and MERVL that is transcriptionally activated at the two-cell stage, are largely marked by m
A. Our results provide a foundation for future studies exploring the regulatory roles of m
A in mammalian early embryonic development.
