Expression of the C-Terminal Domain of Mammalian TET3 DNA Dioxygenase in Arabidopsis thaliana Induces Heritable Methylation Changes at rDNA LociReportar como inadecuado




Expression of the C-Terminal Domain of Mammalian TET3 DNA Dioxygenase in Arabidopsis thaliana Induces Heritable Methylation Changes at rDNA Loci - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

In plants, demethylation of 5-methylcytosine 5 mC residues is controlled by DNA glycosylases, while in mammals it requires oxidation of 5 mC by TET proteins, a group of FeII-2-oxoglutaratedependent dioxygenases. We analysed the effects of expressing the C-terminal catalytic domain of the human TET3 gene TET3c in Arabidopsis thaliana, using an rDNA region as a methylation reporter. In TET3c transformants, epialleles with hypomethylation or hypermethylation patterns can be induced, which is each stably retained in progeny lines even after removal of the TET3c transgene. In TET3c transformants, 5-hydroxymethylcytosine 5 hmC marks are detected, indicative of the oxidative activity of the transgenic enzyme. 5-formylcytosine 5 fC is only detectable in TET3c transformants with a DNA glycosylase mutant background suggesting further oxidation of 5 hmC residues to 5 fC by TET3c, and efficient recognition and removal of 5 fC by plant glycosylases. The results suggest that TET3c can be employed to induce heritable locus-specific changes in DNA methylation, and that accumulation of 5 hmC can be used as a marker for TET3c target regions.

KEYWORDS

Arabidopsis thaliana, DNA Methylation, DNA Demethylation, Ten-Eleven-Translocation TET Proteins, Dioxygenase, 5-Hydroxy-Methylcytosine 5 hmC, 5-Formyl-Cytosine 1.

Cite this paper

Hollwey, E. , Watson, M. and Meyer, P. 2016 Expression of the C-Terminal Domain of Mammalian TET3 DNA Dioxygenase in Arabidopsis thaliana Induces Heritable Methylation Changes at rDNA Loci. Advances in Bioscience and Biotechnology, 7, 243-250. doi: 10.4236-abb.2016.75023.





Autor: Elizabeth Hollwey, Michael Watson, Peter Meyer

Fuente: http://www.scirp.org/



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