| Domain | Name | Category | Type |
| IPR002934 | Polymerase, nucleotidyl transferase domain | Domain | Domain |
| IPR007010 | Poly(A) polymerase, RNA-binding domain | Domain | Domain |
| IPR007012 | Poly(A) polymerase, central domain | Domain | Domain |
| IPR011068 | Nucleotidyltransferase, class I-like, C-terminal | Family | Homologous superfamily |
| IPR014492 | Poly(A) polymerase | Family | Family |
| IPR043519 | Nucleotidyltransferase superfamily | Family | Homologous superfamily |