Purification of TET Proteins.
Methods Mol Biol
; 2272: 225-237, 2021.
Article
em En
| MEDLINE
| ID: mdl-34009617
ABSTRACT
The 5-methylcytosine (5mC) oxidation pathway mediated by TET proteins involves step-wise oxidation of 5mC to 5-hydroxymethylcytosine (5hmC), 5-formylcytosine (5fC), and 5-carboxylcytosine (5caC). 5fC and 5caC can be removed from DNA by base excision repair and the completion of this pathway results in "demethylation" of 5mC by converting the modified base back into cytosine. In vitro studies with TET proteins aimed at analyzing their DNA substrate specificities and their activity within defined chromatin templates are relatively limited. Here we describe purification methods for mammalian TET proteins based on expression in insect cells or in 293T cells. We also briefly summarize a method that can be used to monitor 5-methylcytosine oxidase activity of the purified TET proteins in vitro.
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Base de dados:
MEDLINE
Assunto principal:
DNA
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Proteínas Proto-Oncogênicas
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Metilação de DNA
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5-Metilcitosina
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Oxigenases de Função Mista
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article