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Identification of YTHDC2 knockout regulated mRNA

ABSTRACT: Identification of YTHDC2 knockout regulated mRNA

PROVIDER: PRJNA1009003 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR25755206_1.fastq.gz	Fastqsanger.gz
	SRR25755206_2.fastq.gz	Fastqsanger.gz
	SRR25755207_1.fastq.gz	Fastqsanger.gz
	SRR25755207_2.fastq.gz	Fastqsanger.gz
	SRR25755208_1.fastq.gz	Fastqsanger.gz

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Identification of YTHDC2 knockout regulated mRNA

Project description:In order to identify YTHDC2 downstream genes, we performed RNA-seq in WT and YTHDC2 knockout H1975 cells and analyzed the changed mRNAs.

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YTHDC2 regulates spermatogenesis through promoting the translation of N6-methyladenosine-modified RNA

Project description:N6-methyladenosine (m6A) is the most common internal modification in eukaryotic mRNA. It is dynamically installed and removed, and acts as an essential layer of mRNA metabolism, regulating biological processes including stem cell pluripotency, cell differentiation, and energy homeostasis. m6A is recognized by selective binding proteins; YTHDF1 and YTHDF3 work in concert to promote the translation of m6A-containing mRNAs, YTHDF2 expedites mRNA decay, and YTHDC1 affects the splicing of its targets. The biological function of YTHDC2, the final member of the YTH protein family, remains unknown. We report that YTHDC2 selectively binds m6A along its consensus motif GGACU. YTHDC2 promotes translation of its targets, and associates with cellular fractions involved in translation initiation. Ythdc2 knockout mice are infertile and have significantly smaller testes compared to those of littermates. In the testes, Ythdc2 is temporally expressed as meiosis begins, and germ cells of Ythdc2 knockout mice do not develop past the spermatogonium stage. Thus, YTHDC2 is an m6A binding protein that plays essential roles in spermatogenesis.

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Project description:Identification of the embryonic germ cell Meioc-/- transcriptome, MEIOC targets in postnatal testis, and YTHDC2 targets in postnatal testis in mouse

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The XRN1-regulated RNA helicase activity of YTHDC2 ensures mouse fertility independently of m6A recognition

Project description:The functional consequence of N6-methyladenosine (m6A) RNA modification is mediated by ‘reader’ proteins like those of the YTH family that recruit additional factors to alter splicing, RNA stability or translation. Germline-specific YTH domain-containing 2 (YTHDC2) is essential for mammalian fertility, but its molecular function is poorly understood. Here we use a tagged mouse line to identify U-rich motifs as binding sites of YTHDC2 on 3′ UTRs of testicular RNA targets. Although its YTH domain is an m6A-binder in vitro, the YTH point mutant mouse lacking this ability displays no obvious phenotypes. Its 3′→5′ RNA helicase activity is essential for fertility, with the catalytic-dead mutation being dominant-negative. Single-cell transcriptomics reveal that Ythdc2 mutant mitotic testicular germ cells transition into meiosis but accumulate a transcriptome with mixed mitotic/meiotic identity. We also reveal a conserved role for YTHDC2 in animal fertility.

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The RNA-helicase YTHDC2 serves a late role in spermatocytes during germ cell differentiation

Project description:Post-transcriptional regulation of gene expression by RNA-binding proteins helps facilitate fast, clean transitions from one cell state to the next during germ cell differentiation. Previously we showed that the RNA helicase YTHDC2 is required for germ cells to properly switch from mitosis to meiosis (Bailey et al., 2017). While YTHDC2 protein is first expressed as male germ cells enter meiosis, when it is needed to shut down the mitotic program, YTHDC2 expression continues to increase and reaches its highest levels later in meiotic prophase, in pachytene spermatocytes. Here we show that YTHDC2 has an additional essential role regulating meiotic progression in late spermatocytes during mouse germ cell differentiation. Inducing conditional knockout of Ythdc2 during the first wave of spermatogenesis, after the germ cells have already initiated meiotic prophase, allowed Ythdc2-deficient germ cells to successfully reach the pachytene stage and properly express many meiotic markers. However, instead of continuing through meiotic prophase and initiating the meiotic divisions, late pachytene spermatocytes failed to transition to the diplotene stage and quickly died. Loss of function of Ythdc2 in spermatocytes resulted in changes in transcript levels for a number of genes by RNA-sequencing compared to control spermatocytes. Our findings suggest that YTHDC2 facilitates proper progression of germ cells through multiple steps of meiosis, potentially via several mechanisms of post-transcriptional RNA regulation.

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