西亚试剂：Thymine DNA glycosylase specifically recognizes

Thymine DNA glycosylase specifically recognizes 5-carboxylcytosine-modified DNA

Liang Zhang, Xingyu Lu, Junyan Lu, Haihua Liang, Qing Dai, Guo-Liang Xu, Cheng Luo, Hualiang Jiang & Chuan He

Human thymine DNA glycosylase (hTDG) efficiently excises 5-carboxylcytosine (5caC), a key oxidation product of 5-methylcytosine in genomic DNA, in a recently discovered cytosine demethylation pathway. We present here the crystal structures of the hTDG catalytic domain in complex with duplex DNA containing either 5caC or a fluorinated analog. These structures, together with biochemical and computational analyses, reveal that 5caC is specifically recognized in the active site of hTDG, supporting the role of TDG in mammalian 5-methylcytosine demethylation.