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YTHDC1-Hyper tribe uncover YTHDC1 binding sites in human leukemia cells

ABSTRACT: The goal of this study is to identify YTHDC1 binding targets in MOLM13 cells(AML).

ORGANISM(S): Homo sapiens

PROVIDER: GSE168568 | GEO | 2021/05/24

REPOSITORIES: GEO

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YTHDC1-Hyper tribe uncover YTHDC1 binding sites in human leukemia cells

Project description:YTHDC1-Hyper tribe uncover YTHDC1 binding sites in human leukemia cells

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Project description:RNA modification represents an important post-transcriptional regulatory mechanism in acute myeloid leukemia (AML), however the function and mechanism of RNA acetylation ac4C in AML remains elusive. Here, we report that NAT10, as the ac4C writing enzyme, plays a critical oncogenic function in AML and represents a promising therapeutic target for AML. To understand the mechanisms underlying the function of NAT10 as an RNA ac4C writer in AML, we profiled ac4C modification in the transcriptome of MOLM13 cells using a refined ac4C RNA immunoprecipitation and high throughput sequencing (RacRIP-seq) protocol, and performed systematic calibration with a modification-free control library generated from the in vitro- transcribed MOLM13 transcriptome (referred to as IVT control) to eliminate most of the false- positive signals. We also applied the RacRIP-seq in NAT10 knockdown and control MOLM13 cells to characterize NAT10 targets.

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Project description:YTHDC1 is one of m6A reader proteins exerting multifaceted effects on determining the fate of m6A RNA within the nucleus.To understand how YTHDC1 contributes to liver cancer progression, we conducted RNA-seq assay in shCtrl and shDC1 HepG2 cells and aimed to identified YTHDC1-responsive genes.

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Project description:PLKO.1 lentiviral vectors contained scramble shRNA, YTHDC1 shRNA 1# and YTHDC1 shRNA 2# were transfected into 293T cells together with package plasmids pMDG.2 and Δ8.91. The supernatant medium contained virus was collected and subjected to infect MOLM-13 cells by spinoculation, MOLM-13 cell is an AML cell line. The positive cells were collected 3 days after viral infection and subjected to RNA-seq.

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Nuclear m6 A reader YTHDC1 suppresses proximal alternative polyadenylation sites by interfering with the 3' processing machinery

Project description:N6-methyladenosine (m6 A) and alternative polyadenylation (APA) are important regulators of gene expression in eukaryotes. Recently, it was found that m6 A is closely related to APA. However, the molecular mechanism of this new APA regulation remains elusive. Here, we show that YTHDC1, a nuclear m6 A reader, can suppress proximal APA sites and produce longer 3' UTR transcripts by binding to their upstream m6 A sites. YTHDC1 can directly interact with the 3' end processing factor FIP1L1 and interfere with its ability to recruit CPSF4. Binding to the m6 A sites can promote liquid-liquid phase separation of YTHDC1 and FIP1L1, which may play an important role in their interaction and APA regulation. Collectively, YTHDC1 as an m6 A "reader" links m6 A modification with pre-mRNA 3' end processing, providing a new mechanism for APA regulation.

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