Predicted to enable R-SMAD binding activity. Predicted to be involved in regulation of mRNA polyadenylation. Predicted to act upstream of or within mRNA 3'-end processing and positive regulation of activin receptor signaling pathway. Predicted to be part of mRNA cleavage and polyadenylation specificity factor complex. Predicted to be active in nucleus. Orthologous to human ZC3H3 (zinc finger CCCH-type containing 3). [provided by Alliance of Genome Resources, Apr 2022]