C->U-editing enzyme APOBEC-1 (APOBEC1)

Catalytic component of the apolipoprotein B mRNA editing enzyme complex which is responsible for the postranscriptional editing of a CAA codon for Gln to a UAA codon for stop in the APOB mRNA. Also involved in CGA (Arg) to UGA (Stop) editing in the NF1 mRNA.

May also play a role in the epigenetic regulation of gene expression by engaging in DNA demethylation. .