5 methylcytosine/رشاد الصخر

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The carboxy-terminal domain of ROS1 is essential for 5-methylcytosine DNA glycosylase activity.

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Arabidopsis thaliana repressor of silencing 1 (ROS1) is a multi-domain bifunctional DNA glycosylase/lyase, which excises 5-methylcytosine (5mC) and 5-hydroxymethylcytosine (5hmC) as well as thymine and 5-hydroxymethyluracil (i.e., the deamination products of 5mC and 5hmC) when paired with a guanine,

Distribution of 5-methylcytosine residues in 5S rRNA genes in Arabidopsis thaliana and Secale cereale.

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Bisulfite genomic sequencing was used to localise 5-methylcytosine residues (mC) in 5S rRNA genes of Arabidopsis thaliana and Secale cereale. The maps of mC distribution were compared with the previously published map of the corresponding region in Nicotiana tabacum. In all three species, the level

5-methylcytosine recognition by Arabidopsis thaliana DNA glycosylases DEMETER and DML3.

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Methylation of cytosine to 5-methylcytosine (5mC) is important for gene expression, gene imprinting, X-chromosome inactivation, and transposon silencing. Active demethylation in animals is believed to proceed by DNA glycosylase removal of deaminated or oxidized 5mC. In plants, 5mC is removed from

Evaluation of different computational methods on 5-methylcytosine sites identification.

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5-Methylcytosine (m5C) plays an extremely important role in the basic biochemical process. With the great increase of identified m5C sites in a wide variety of organisms, their epigenetic roles become largely unknown. Hence, accurate identification of m5C site is a key step in understanding its

5-Methylcytosine RNA Methylation in Arabidopsis Thaliana.

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5-Methylcytosine (m5C) is a well-characterized DNA modification, and is also predominantly reported in abundant non-coding RNAs in both prokaryotes and eukaryotes. However, the distribution and biological functions of m5C in plant mRNAs remain largely unknown. Here, we report transcriptome-wide

4mCPred: Machine Learning Methods for DNA N4-methylcytosine sites Prediction.

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UNASSIGNED N4-methylcytosine (4mC), an important epigenetic modification formed by the action of specific methyltransferases, plays an essential role in DNA repair, expression and replication. The accurate identification of 4mC sites aids in-depth research to biological functions and mechanisms.

Conservation of tRNA and rRNA 5-methylcytosine in the kingdom Plantae.

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BACKGROUND Post-transcriptional methylation of RNA cytosine residues to 5-methylcytosine (m(5)C) is an important modification that regulates RNA metabolism and occurs in both eukaryotes and prokaryotes. Yet, to date, no transcriptome-wide identification of m(5)C sites has been undertaken in plants.

Three SRA-domain methylcytosine-binding proteins cooperate to maintain global CpG methylation and epigenetic silencing in Arabidopsis.

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Methylcytosine-binding proteins decipher the epigenetic information encoded by DNA methylation and provide a link between DNA methylation, modification of chromatin structure, and gene silencing. VARIANT IN METHYLATION 1 (VIM1) encodes an SRA (SET- and RING-associated) domain methylcytosine-binding

Transcriptome-Wide Mapping of RNA 5-Methylcytosine in Arabidopsis mRNAs and Noncoding RNAs.

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Posttranscriptional methylation of RNA cytosine residues to 5-methylcytosine (m5C) is an important modification with diverse roles, such as regulating stress responses, stem cell proliferation, and RNA metabolism. Here, we used RNA bisulfite sequencing for transcriptome-wide quantitative mapping of

DEMETER and REPRESSOR OF SILENCING 1 encode 5-methylcytosine DNA glycosylases.

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Cytosine methylation is an epigenetic mark that promotes gene silencing and plays important roles in development and genome defense against transposons. Methylation patterns are established and maintained by DNA methyltransferases that catalyze transfer of a methyl group from S-adenosyl-L-methionine

AP endonucleases process 5-methylcytosine excision intermediates during active DNA demethylation in Arabidopsis.

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DNA methylation is a primary epigenetic modification regulating gene expression and chromatin structure in many eukaryotes. Plants have a unique DNA demethylation system in that 5-methylcytosine (5mC) is directly removed by DNA demethylases, such as DME/ROS1 family proteins, but little is known

The DNA dioxygenase ALKBH2 protects Arabidopsis thaliana against methylation damage.

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The Escherichia coli AlkB protein (EcAlkB) is a DNA repair enzyme which reverses methylation damage such as 1-methyladenine (1-meA) and 3-methylcytosine (3-meC). The mammalian AlkB homologues ALKBH2 and ALKBH3 display EcAlkB-like repair activity in vitro, but their substrate specificities are

Regulation of Active DNA Demethylation by a Methyl-CpG-Binding Domain Protein in Arabidopsis thaliana.

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Active DNA demethylation plays crucial roles in the regulation of gene expression in both plants and animals. In Arabidopsis thaliana, active DNA demethylation is initiated by the ROS1 subfamily of 5-methylcytosine-specific DNA glycosylases via a base excision repair mechanism. Recently, IDM1 and

Characterization of an Arabidopsis thaliana DNA hypomethylation mutant.

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We have recently isolated two Arabidopsis thaliana DNA hypomethylation mutations, identifying the DDM1 locus, that cause a 70% reduction in genomic 5-methylcytosine levels [1]. Here we describe further phenotypic and biochemical characterization of the ddm1 mutants. ddm1/ddm1 homozygotes exhibited

Epigenetic role for the conserved Fe-S cluster biogenesis protein AtDRE2 in Arabidopsis thaliana.

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On fertilization in Arabidopsis thaliana, one maternal gamete, the central cell, forms a placenta-like tissue, the endosperm. The DNA glycosylase DEMETER (DME) excises 5-methylcytosine via the base excision repair pathway in the central cell before fertilization, creating patterns of asymmetric DNA

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