Enables mRNA 3'-UTR AU-rich region binding activity. Involved in DNA demethylation and negative regulation of DNA methylation-dependent heterochromatin assembly. Acts upstream of or within several processes, including RNA modification; lipoprotein transport; and mRNA stabilization. Predicted to be active in cytoplasm and nucleus. Is expressed in early conceptus and genitourinary system. Orthologous to human APOBEC1 (apolipoprotein B mRNA editing enzyme catalytic subunit 1). [provided by Alliance of Genome Resources, Apr 2022]