Dioxygenase that mediates demethylation of actin monomethylated at 'Lys-84' (K84me1), thereby acting as a regulator of actomyosin-processes (By similarity). Demethylation of actin K84me1 is required for maintaining actomyosin dynamics supporting normal cleavage furrow ingression during cytokinesis and cell migration (By similarity). In addition to proteins, also demethylates DNA: specifically demethylates DNA methylated on the 6th position of adenine (N(6)-methyladenosine) DNA, thereby regulating Polycomb silencing (PubMed:30982744). 2-oxoglutarate + an N(6)-methyl-2'-deoxyadenosine in DNA + O2 = a 2'-deoxyadenosine in DNA + CO2 + formaldehyde + succinate 2-oxoglutarate + N(6)-methyl-L-lysyl-[protein] + O2 = CO2 + formaldehyde + L-lysyl-[protein] + succinate Binds 1 Fe(2+) ion per subunit. Interacts with ZFHX3, MLLT3, MLLT1, HSF4, EP300, TES, EIF3C, MTMR6 and PSMA6. Associates with the contractile ring and midbody. Embryonic lethality (PubMed:23673617). Conditional deletion in developing juvenile mice leads to spermatogenic defects (PubMed:25153837). Belongs to the alkB family.