Methylcytosine dioxygenase TET2 (TET2)

Dioxygenase that catalyzes the conversion of this modified genomic base 5-methylcytosine (5mC) into 5- hydroxymethylcytosine (5hmC) and plays a key role in active DNA demethylation. Has a preference for 5-hydroxymethylcytosine in CpG motifs.

Also mediates following conversion of 5hmC into 5- formylcytosine (5fC), and conversion of 5fC to 5-carboxylcytosine (5caC). Conversion of 5mC to 5hmC, 5fC and 5caC probably constitutes the first step in cytosine demethylation.