An alpha helical domain related to the alpha-helical DNA glycosylases, predicted to catalyze the in situ synthesis of hypermodified bases such as alpha-glutamyl, putrescinyl thymine, 5-(2-aminoethoxy)methyluridine or 5-(2-aminoethyl)uridine. The enzyme is predicted to utilize a high-energy pyrophosphate DNA base intermediate which is subject to a nucleophilic attack by the modifying moiety. Mainly found in bacterial mobile operons [1].

1: Computational identification of novel biochemical systems involved in oxidation, glycosylation and other complex modifications of bases in DNA. Iyer LM, Zhang D, Burroughs AM, Aravind L; Nucleic Acids Res. 2013;41:7635-7655. PMID:23814188