The function of ENSG00000168803 (MAPDA, N6-Methyl-AMP deaminase) is as follows. Deaminase involved in the detoxification of modified adenosines containing N(6)-methylated adenine (m6A) post- transcriptional modification (PubMed:40840445). Modified nucleosides are derived from the degradation of RNAs (mRNAs, rRNAs and tRNAs) and possess intrinsic cytotoxicity and must be cleared to prevent metabolic dysfunction (PubMed:40840445). Acts downstream of ADK and catalyzes the hydrolysis of the free cytosolic methylated adenosine nucleotides N(6)- methyl-AMP (m6AMP), N(6),N(6)-dimethyl-AMP (m6,6AMP) and N(6)- isopentenyl-AMP (i6AMP) to produce inositol monophosphate (IMP) (PubMed:21755941, PubMed:29884623, PubMed:40840445). Catalyzes the removal of different alkyl groups not only from N6-substituted purine or 2-aminopurine nucleoside monophosphates but also from O6-substituted compounds in vitro (PubMed:21755941). {ECO:0000269|PubMed:21755941, ECO:0000269|PubMed:29884623, ECO:0000269|PubMed:40840445}.