Zebrafish AID is capable of deaminating methylated deoxycytidines

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Zebrafish AID is capable of deaminating methylated deoxycytidines

Activation-induced cytidine deaminase (AID) deaminates deoxycytidine (dC) to deoxyuracil (dU) at immunoglobulin loci in B lymphocytes to mediate secondary antibody diversification. Recently, AID has been proposed to also mediate epigenetic reprogramming by demethylating methylated cytidines (mC) possibly through deamination. AID overexpression in zebrafish embryos was shown to promote genome de...

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Activation-induced deaminase (AID) is a protein indispensable for the diversification of immunoglobulin (Ig) genes by somatic hypermutation (SHM), class switch recombination (CSR), and gene conversion. To date, the precise role of AID in these processes has not been determined. Here we demonstrate that purified, tetrameric AID can deaminate cytidine residues in DNA, but not in RNA. Furthermore,...

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ژورنال

عنوان ژورنال: Nucleic Acids Research

سال: 2013

ISSN: 1362-4962,0305-1048

DOI: 10.1093/nar/gkt212