Predicted to enable guanylyltransferase activity and polynucleotide adenylyltransferase activity. Predicted to be involved in several processes, including RNA metabolic process; negative regulation of telomere maintenance via telomerase; and regulation of mRNA stability. Predicted to be located in cytoplasm. Predicted to be part of TRAMP complex. Predicted to be active in nucleolus. Orthologous to human TENT4B (terminal nucleotidyltransferase 4B). [provided by Alliance of Genome Resources, Apr 2022]