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Title of Journal: Chromosome Res

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Abbravation: Chromosome Research

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Springer Netherlands

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DOI

10.1007/s10528-007-9113-y

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1573-6849

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DNA methylation patterns of Emphasis Type="Italic

Authors: Natalia Borowska Dominika Idziak Robert Hasterok
Publish Date: 2011/11/11
Volume: 19, Issue: 8, Pages: 955-967
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Abstract

Sequential immunolocalisation of 5methylcytosine 5MeC and fluorescence in situ hybridisation with chromosomespecific BAC clones were performed on Brachypodium distachyon mitotic metaphase chromosomes to determine specific DNA methylation patterns of each chromosome in the complement In the majority of cells examined chromosomes Bd4 and Bd5 which bear the loci of 5S and 35S ribosomal DNA respectively had characteristic 5MeC patterns In contrast the distribution of 5MeC along the metacentric chromosome pairs Bd1 Bd2 and Bd3 was more variable There were numerous differences in distribution of methylated sites between homologous chromosomes as well as between chromosome arms Some chromosome sites such as pericentromeric regions were highly methylated in all chromosomes Additionally the influence of a hypomethylating agent 5azacytidine on B distachyon chromosome methylation patterns was confirmed It was found that some chromosome pairs underwent demethylation more easily than others but there was no apparent regularity in demethylation of particular chromosome segments

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