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Identification of N6-Methyladenosine associated genes in osteoarthritis

ABSTRACT: Identification of N6-Methyladenosine associated genes in osteoarthritis

PROVIDER: PRJNA914276 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR22828250_1.fastq.gz	Fastqsanger.gz
	SRR22828250_2.fastq.gz	Fastqsanger.gz
	SRR22828251_1.fastq.gz	Fastqsanger.gz
	SRR22828251_2.fastq.gz	Fastqsanger.gz
	SRR22828252_1.fastq.gz	Fastqsanger.gz

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Identification of N6-Methyladenosine associated genes in osteoarthritis

Project description:Our study aimed to identify common m6A features in OA. We identified 8511 genes with 25295 peaks in the OA sample and 7541 genes with 17474 peaks in the control sample, indicating an overall hypermethylated level in the OA cartilage.

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Identification of N6-methyladenosine (m6A) modified RNA in activated ILC2

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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 methylation profile in rat H9C2 cardiomyocytes under the hypoxic stress

Project description:Hypoxia as a crucial pathogenesis factor usually results in huge harmful effects on cardiac injury and dysfunction. In our previous study (PMID: 33294289), We observe a series of differential expressed genes between transcription and translation, which may be attributed to the hypoxia-specific binding affinity of Nuclear cap-binding subunit 3 (NCBP3) at 5’ un-translation region of target genes. But the underlying molecular mechanism of NCBP3 for gene translation modulation remains unclear. Here, we conducted RIP-seq of N6-Methyladenosine methylation in H9C2 cells with the conditions of normoxic, hypoxic and with additional NCBP3 knockdown.

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

Identification of 5-methylcytosine associated genes in osteoarthritis

Project description:Identification of 5-methylcytosine associated genes in osteoarthritis

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Identification and Characterization of the Mammalian Nuclear RNA N6-Adenosine Methyltransferase Core Complex

Project description:N6-methyladenosine (m6A) is the most prevalent internal modification found in mammalian messenger and non-coding RNAs. The discoveries of functionally significant demethylases that reverse this methylation as well as the recently revealed m6A distributions in mammalian transcriptomes strongly indicate regulatory functions of this modification. Here we report the identification and characterization of the mammalian nuclear RNA N6-adenosine methyltransferase core (RNMTC) complex. Besides METTL3, a methyltransferase which was the only known component of RNMTC in the past, we discovered that a previously uncharacterized methyltransferase, METTL14, exhibits a N6-adenosine methyltransferase activity higher than METTL3. Together with WTAP, the third component that dramatically affects the cellular m6A level, these three proteins form the core complex that orchestrates m6A deposition on mammalian nuclear RNA. Biochemistry assays, imaging experiments, as well as transcriptome-wide analyses of the binding sites and their effects on m6A methylation support methylation function and reveal new insights of RNMTC. PAR-CLIP and m6A-seq in HeLa cells

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