This domain is the N-terminal domain of Alkylated DNA repair protein alkB homolog 8 (ALKBH8) and its homologues. This domain corresponds to the basic alpha-helix located at the N-terminal of the RRM domain, which enhances its RNA binding affinity [1].

1: Crystal structure and RNA binding properties of the RNA recognition motif (RRM) and AlkB domains in human AlkB homolog 8 (ABH8), an enzyme catalyzing tRNA hypermodification. Pastore C, Topalidou I, Forouhar F, Yan AC, Levy M, Hunt JF; J Biol Chem. 2012;287:2130-2143. PMID:22065580