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Profiling of N6-methyladenosine (m6A) in Arabidopsis wild type and ABI3:MTA

ABSTRACT: Profiling of N6-methyladenosine (m6A) in Arabidopsis wild type and ABI3:MTA

PROVIDER: PRJNA428515 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR6441310.fastq.gz	Fastqsanger.gz
	SRR6441311.fastq.gz	Fastqsanger.gz
	SRR6441312.fastq.gz	Fastqsanger.gz
	SRR6441305.fastq.gz	Fastqsanger.gz
	SRR6441306.fastq.gz	Fastqsanger.gz

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Profiling of N6-methyladenosine (m6A) in Arabidopsis wild type and ABI3:MTA

Project description:In order to gain insight into abundance of transcripts in the presence and absence of m6A, we performed an mRNA sequencing expirement in both mta and Col-0 plants.

2018-11-09 | GSE108765 | GEO

Arabidopsis Messenger RNA N6-methyladenosine Demethylation Regulates Plant Development

Project description:N6-methyladenosine (m6A) is the most abundant internal modification in the messenger RNA (mRNA) of all higher eukaryotes. This modification has been shown to be reversible in mammals; it is installed by a methyltransferase heterodimer complex of METTL3 and METTL14 bound with WTAP, and reversed by iron(II)- and Î±-ketoglutarate-dependent demethylases FTO and ALKBH5. This modification exhibits significant functional roles in various biological processes. The m6A modification as a RNA mark is recognized by reader proteins, such as YTH domain family proteins and HNRNPA2B1; m6A can also act as a structure switch to affect RNA-protein interactions for biological regulation. In Arabidopsis thaliana, the methyltransferase subunit MTA (the plant orthologue of human METTL3, encoded by At4g10760) was well characterized and FIP37 (the plant orthologue of human WTAP) was first identified as the interacting partner of MTA. Here we report the discovery and characterization of reversible m6A methylation mediated by AtALKBH10B (encoded by At4g02940) in A. thaliana, and noticeable roles of this RNA demethylase in affecting plant development and floral transition. Our findings reveal potential broad functions of reversible mRNA methylation in plants. m6A peaks were identified from wild type Columbia-0 and atalkbh10b-1 mutant in two biological replicates

2016-03-24 | E-GEOD-79523 | biostudies-arrayexpress

Serrate modulates N6-Methyladenosine (m6A) RNA modification in Arabidopsis

Project description:N6-methyladenosine (m6A) is the most common prevalent internal modifications found in many of the eukaryotic mRNA and plays an important role in RNA metabolism including pre-mRNA processing, mRNA stability, RNA splicing, RNA export and nuclear retention. Serrate is a component of the Dicer complex, plays as a key factor in RNA metabolism. We here reported SERRATE acts as a key regulator of mRNA m6A modification in Arabidopsis. Loss function of SE results in significant global m6A level reduction in the se-1 mutant comparing to the Col-0. SE positively regulates the transcription of MTA and MTB. In addition, SE physically interacts and functionally works with the m6A writer complex MTA and MTB which affects the binding of m6A methylase to mRNA. Taking together, our data provides a molecular framework that SE modulates m6A mRNA modification in Arabidopsis.

2023-11-01 | GSE241248 | GEO

mRNA adenosine methylase (MTA) deposits m6A on pri-miRNAs to modulate miRNA biogenesis in Arabidopsis thaliana [smallRNAs]

Project description:In order to assess the possible effects of m6A on miRNA biogenesis we performed small RNA (sRNA) sequencing to compare their levels in WT Col-0 plants to those in mutant lines with severely reduced m6A levels. The reduced mta line contains MTA cDNA under the ABI3 promoter in MTA null mutant background (ABI3:MTA) and ABI3 being an embryo specific promoter rescues the embryo lethal phenotype of MTA knockout while keeping the levels of MTA in mature plants severely low34. sRNAs isolated from 4 week old WT and mta plants were used to make libraries that were sequenced using HiSeq® (Illumina) and the results were analyzed using NOISeq package in R-Studio.

2020-09-21 | GSE122526 | GEO

N6-methyladenosine mRNA methylomes in the MTA RNAi strawberry fruits and the controls

Project description:For exploring the influence of the m6A methyltransferase gene MTA silencing in the global m6A mRNA methylomes of strawberry fruits, we performed m6A-seq in the MTA RNAi strawberry fruits (RNAi-MTA) and the controls with three independently biological replicates. Results showed that MTA silencing induces the m6A hypomethylation of thousands of transcripts, including those of ripening and ABA pathway genes.

2021-05-20 | GSE174703 | GEO

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

2015-06-09 | E-GEOD-63591 | biostudies-arrayexpress

YTHDF3 improves translation initiation of mRNAs with N6-methyladenosine methylation at 5’ untranslated region by facilitating eIF2AK2 recruitment in oxaliplatin-resistant colorectal cancer - RIP-seq dataset

Project description:Oxaliplatin as a first-line drug frequently causes the chemo-resistance on colorectal cancer (CRC). N6-methyladenosine (m6A) methylation has been largely acknowledged in multiple biological functions. However, the molecular mechanisms underlying the m6A methylation in modulating anticancer drug resistance in CRC are still obscure. In present study, RIP-seq was conducted to investigate the occupancy of N6-methyladenosine RNA binding protein 3 (YTHDF3) served as “readers” that can recognize m6A modification site in HCT116 cells with oxaliplatin resistance (HCT116R). Then, YTHDF3 was knockdown by siRNA in HCT116 cells with oxaliplatin resistance, and RIP-seq was further conducted to investigate m6A methylation of HCT116, HCT116R and HCT116R cells with YTHDF3 knockdown.

2022-02-04 | E-MTAB-11321 | biostudies-arrayexpress

mRNA ADENOSINE METHYLASE promotes drought tolerance through N6-methyladenosine-dependent and independent impacts on mRNA regulation in Arabidopsis

Project description:• Among many mRNA modifications, adenine methylation at the N6 position (N6-methyladenosine, m6A) is known to affect mRNA biology extensively. The influence of m6A has yet to be assessed under drought, one of the most impactful abiotic stresses. • We show that Arabidopsis thaliana (L.) Heynh. (Arabidopsis) plants lacking mRNA ADENOSINE METHYLASE (MTA) are drought sensitive. Subsequently, we comprehensively assess the impacts of MTA-dependent m6A changes during drought on mRNA abundance, stability, and translation in Arabidopsis. • During drought, there is a global trend towards hyper-methylation of many protein-coding transcripts that does not occur in mta. We also observe complex regulation of m6A at a transcript-specific level, possibly reflecting compensation by other m6A components. Importantly, a subset of transcripts that are hyper-methylated in an MTA-dependent manner exhibited reduced turnover and translation in mta, compared to wild-type plants, during drought. Additionally, MTA impacts transcript stability and translation independently of m6A. We also correlate drought-associated deposition of m6A with increased translation of modulators of drought response, such as RD29A, COR47, COR413, ALDH2B, ERD7, and ABF4 in WT, which is impaired in mta. • m6A is dynamic during drought and, alongside MTA, promotes tolerance by regulating drought-responsive changes in transcript turnover and translation.

2024-10-07 | GSE243365 | 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

2015-02-27 | E-GEOD-56010 | biostudies-arrayexpress

N6-methyladenosine (m6A) profiling of mouse liver

Project description:N6-methyladenosine (m6A) profiling of mouse liver

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