5 methylcytosine/tabakas

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Mapping of 5-methylcytosine residues in Nicotiana tabacum 5S rRNA genes by genomic sequencing.

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Genomic sequencing was used to localise 5-methylcytosine residues in individual DNA strands of 5S rRNA genes in tobacco. The density of methylation along the sequence was high in both strands, exceeding the average methylation density of the tobacco genome. Besides methylation of CG and CNG

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

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

Determination of 5-methylcytosine from plant DNA by high-performance liquid chromatography.

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The relative amounts of the five nucleosides (deoxycytidine, 5-methyldeoxycytidine, deoxyadenosine, deoxyguanosine and thymidine) in the DNA of nine plant species, one plant satellite DNA, and one animal species were determined by high performance liquid chromatography. The method allows the clean

Differential sensitivity of CG and CCG DNA sequences to ethionine-induced hypomethylation of the Nicotiana tabacum genome.

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Plant DNA is distinguished from the DNA of all other organisms by its high content of 5-methylcytosine (5mC). 5mC levels may amount to 30% of total cytosines, distributed between the sequences CG and CXG. The results presented here show that the methylation status of CXG sequences could be

Gene conversion of ribosomal DNA in Nicotiana tabacum is associated with undermethylated, decondensed and probably active gene units.

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We examined the structure, intranuclear distribution and activity of ribosomal DNA (rDNA) in Nicotiana sylvestris (2n = 2x = 24) and N. tomentosiformis (2n = 2x = 24) and compared these with patterns in N. tabacum (tobacco, 2n = 4x = 48). We also examined a long-established N. tabacum culture,

Comparative analysis of DNA methylation in tobacco heterochromatic sequences.

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Cytosine methylation levels and susceptibility to drug-induced hypomethylation have been studied in several Nicotiana tabacum (tobacco) DNA repetitive sequences. It has been shown using HapII, MspI, BamHI and Sau3AI methylation-sensitive restriction enzymes that the degree of 5'-mCmCG-3' methylation

Interaction between methyl CpG-binding protein and ran GTPase during cell division in tobacco cultured cells.

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OBJECTIVE Methyl CpG-binding proteins are considered to play critical roles in epigenetic control of gene expression by recognizing and interacting with 5-methylcytosine (m(5)C) in eukaryotes. However, among 13 corresponding genes in Arabidopsis thaliana, designated as featuring a methyl-binding

Epigenetic switch from posttranscriptional to transcriptional silencing is correlated with promoter hypermethylation.

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Changes in the distribution of methylcytosine residues along a transgene locus of tobacco (Nicotiana tabacum) in relation to the type of gene silencing were studied in parental plant leaves, calli, and regenerated plants derived thereof. Parental-silenced HeLo1 (hemizygous for locus 1) plants show

DNA methylation inhibits propagation of tomato golden mosaic virus DNA in transfected protoplasts.

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The effects of methylation on plant viral DNA replication have been studied in Nicotiana tabacum protoplasts transfected with DNA of the geminivirus tomato golden mosaic virus (TGMV). The transfected cells were also used to determine whether experimentally introduced methylation patterns are

DNA methylation, vernalization, and the initiation of flowering.

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Late-flowering ecotypes and mutants of Arabidopsis thaliana and the related crucifer Thlaspi arvense flower early after cold treatment (vernalization). Treatment with the DNA demethylating agent 5-azacytidine induced nonvernalized plants to flower significantly earlier than untreated controls.

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