Cytidine deaminase catalyzing the cytidine to uridine postranscriptional editing of a variety of mRNAs . Form complexes with cofactors that confer differential editing activity and selectivity. Responsible for the postranscriptional editing of a CAA codon for Gln to a UAA codon for stop in the apolipoprotein B 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 participating in DNA demethylation (By similarity).
Subcellular locations: Cytoplasm, Nucleus
Expressed exclusively in the small intestine.