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Mapping N6-methyladenosine methylome in mouse embryonic stem cells

ABSTRACT: m6A-seq of undifferentiated and differentiated mouse embryonic stem cell

ORGANISM(S): Mus musculus

PROVIDER: GSE44086 | GEO | 2015/12/31

SECONDARY ACCESSION(S): PRJNA188519

REPOSITORIES: GEO

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Mapping N6-methyladenosine methylome in mouse embryonic stem cells

Project description:m6A-seq of undifferentiated and differentiated mouse embryonic stem cell m6A-mRNA library for undifferentiated and differentiated mouse embryonic stem cell each having one biological replicate were generated using HiSeq2000 v3 flowcell (Illumina) and sequenced for 100 bases with separate 7 base indexing read in a single lane.

2015-12-31 | E-GEOD-44086 | biostudies-arrayexpress

Arginine methylation of METTL14 promotes RNA N6-methyladenosine modification and endoderm differentiation of mouse embryonic stem cells

Project description:m6A is the most abundant modification of mRNA in mammals and plays an important role in human development and disease. METTL14 is a key component of m6A methyltransferase complex. The project showed that its post-translational arginine methylation can regulate the generation of m6A and the endoderm differentiation of mouse embryonic stem cells, indicating its essential function in the normal development of embryos.

2021-05-17 | PXD018458 |

Genome-wide identification of N6-methyladenosine by microarray

Project description:Although internal PolyA RNA modification N6-methyladenosine (m6A) plays essential roles in diverse biological processes, technology to detect precise m6A sites at transcriptome-wide scale is lacking. Here, we discovered that m6A interferes A (Adenine) – U (Uracil) or A-T (Thymidine) pairing. Based on differential hybridization between methylated vs. unmethylated RNAs to a DNA probe, we developed tiling microarray to pinpoint m6A sites in mouse transcriptome. We validated some of the identified sites and provided evidence to suggest that one functional mechanism of m6A is to block small RNA targeting to methylated mRNA. We designed a custom tiling array with to examine the precise location of m6A within meRIP-seq peaks from mouse embryonic stem cells determined in our previous publication (Wang et al., 2014). Each custom two-channel Agilent tiling array harbors 947,952 probes. Each probe is 25 nucleotides (nt), and any two adjacent probes in the genomic coordinate overlap each other by 19 nt. The Cy5 or red channel corresponds to Mettl14 knockout (M14) or DZA mutant mESC cell line, and Cy3 or green channel is associated with wild type cell line treated with scramble hairpin (SCR). Thus, in principle a higher Cy5/Cy3 signal for each probe reflects an increased hybridization to the oligonucleotide due to de-methylation of a particular RNA molecule in M14 or DZA condition relative to the SCR control. Moreover, we employed additional arrays with both channels dedicated for M14 as an external control for technical difference between the Cy5 and Cy3 dye (details below). For each comparison, we have three biological replicates, and therefore there are 9 tiling arrays in total (i.e., 3 arrays for M14 vs SCR, 3 arrays for DZA vs SCR, and 3 arrays for M14 vs M14).

2015-09-08 | E-GEOD-62530 | biostudies-arrayexpress

N6-methyladenosine Modulates Messenger RNA Translation Efficiency

Project description:N6-methyladenosine (m6A) is the most abundant internal messenger (mRNA) modification in mammalian mRNA. This modification is reversible and non-stoichiometric, which potentially adds an additional layer of variety and dynamic control of mRNA metabolism. The m6A-modified mRNA can be selectively recognized by the YTH family “reader” proteins. The preferential binding of m6A-containing mRNA by YTHDF2 is known to reduce the stability of the target transcripts; however, the exact effects of m6A on translation has yet to be elucidated. Here we show that another m6A reader protein, YTHDF1, promotes ribosome loading of its target transcripts. YTHDF1 forms a complex with translation initiation factors to elevate the translation efficiency of its bound mRNA. In a unified mechanism of translation control through m6A, the YTHDF2-mediated decay controls the lifetime of target transcripts; whereas, the YTHDF1-based translation promotion increases the translation efficiency to ensure effective protein production from relatively short-lived transcripts that are marked by m6A. PAR-CLIP and RIP was used to identify YTHDF1 binding sites followed by ribosome profling and RNA seq to assess the consequences of YTHDF1 siRNA knock-down

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Profiling of N6-methyladenosine in mouse embryonic stem cells: Setd2 knockdown and control cells

Project description:Setd2 is the specific methyltransferase of H3K36me3. To understand the global effect of H3K36me3 on m6A modification, we used mouse embryonic stem cells (mESCs) model with doxycycline (Dox)-induced Setd2 knockdown, and performed m6A-IP followed by sequencing in mESCs with or without Dox treatment. We found that depletion of H3K36me3 by Setd2 silencing globally reduced m6A in mouse transcriptome.

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Project description:N6-methyladenosine (m6A) is the most abundant chemical modification in mRNA, and plays important roles in human embryonic stem cell pluripotency, maintenance, and differentiation. However, the role of m6A and the precise mechanisms involved during the development of β-cells are unexplored. Here, we differentiated human embryonic stem cells (hESCs) into pancreatic β-like cells and performed RNA-Seq and m6A-seq at different stages of in vitro β-like cell differentiation.

2024-06-13 | GSE236325 | GEO

Activin/Nodal-dependent N6-methyladenosine (m6A) deposition in human pluripotent stem cells

Project description:This experiment was designed to probe the function of Activin/Nodal signalling in the deposition of m6A in human pluripotent stem cells (hPSCs). hPSCs were cultured in presence of Activin or subjected to short-term inhibition of Activin/Nodal signalling for 2h using the receptor antagonist SB-431542 (IP). The global abundance of m6A was then measured by nuclear-enriched methylated RNA immunoprecipitation followed by deep sequencing (NeMeRIP-seq). Pre-NeMeRIP input RNA was used as control to normalise for the changes in gene expression in the two conditions.

2017-12-26 | E-MTAB-5229 | biostudies-arrayexpress

N6-methyladenosine (m6A) methylated RNA immunoprecipatation and sequencing in wildtype and Mettl5-/- embryonic stem cells.

Project description:We report the application of methylated RNA immunoprecipatation and sequencing technology for high-throughput profiling of m6A modifications in embryonic stem cells (ESCs). By using proteinA/G and m6A antibody, we obtained immunoprecipitated RNA of mouse ESCs. RNAs can be read in a single nucleotide accuracy analysis.

2020-10-01 | GSE153139 | GEO

Widespread N6-methyladenosine-dependent RNA Structural Switches Regulate RNA-Protein Interactions

Project description:We show that N6-methyladenosine (m6A), the most abundant internal modification in mRNA/lncRNA with still poorly characterized function, alters RNA structure to facilitate the access of RBM for heterogeneous nuclear ribonucleoprotein C (hnRNP C). We term this mechanism m6A-switch. Through combining PAR-CLIP with Me-RIP, we identify 39,060 m6A-switches among hnRNP C binding sites transcriptome-wide. We show that m6A-methyltransferases METTL3 or METTL14 knockdown decreases hnRNP C binding at 16,582 m6A-switches. Taken together, 2,798 m6A-switches of high confidence are identified to mediate RNA-hnRNP C interactions and affect diverse biological processes including cell cycle regulation. These findings reveal the biological importance of m6A and provide insights into the sophisticated regulation of RNA-RBP interactions through m6A-induced RNA structural remodeling. Measure the m6A methylated hnRNP C binding sites transcriptome-wide by PARCLIP-MeRIP; measure the differential hnRNP C occupancies upon METTL3/METTL14 knockdown by PAR-CLIP; measure RNA abundance and splicing level changes upon HNRNPC, METTL3 and METTL14 knockdown

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