Zinc-finger RNA-binding protein that destabilizes several cytoplasmic AU-rich element (ARE)-containing mRNA transcripts by promoting their poly(A) tail removal or deadenylation, and hence provide a mechanism for attenuating protein synthesis (PubMed:10751406, PubMed:12748283). Acts as a 3'-untranslated region (UTR) ARE mRNA-binding adapter protein to communicate signaling events to the mRNA decay machinery (By similarity). Functions by recruiting the CCR4-NOT deadenylase complex and probably other components of the cytoplasmic RNA decay machinery to the bound ARE-containing mRNAs, and hence promotes ARE-mediated mRNA deadenylation and decay processes (By similarity). Binds to 3'-UTR ARE of numerous mRNAs (PubMed:12748283). Induces also the degradation of ARE-containing mRNAs even in absence of poly(A) tail (PubMed:10751406, PubMed:11279239). Required for tubulogenesis during pronephros development (By similarity). Shuttles between the nucleus and the cytoplasm in a XPO1/CRM1-dependent manner. Widely expressed in adults. Expressed both maternally and zygotically. Phosphorylated (By similarity). Probable hybrid of the A and B paralogous sequences.