| Domain | Name | Category | Type |
| IPR001678 | SAM-dependent methyltransferase RsmB/NOP2-type | Domain | Domain |
| IPR011023 | Nop2p | Domain | Domain |
| IPR012586 | P120R repeat | Repeat | Repeat |
| IPR018314 | Bacterial Fmu (Sun)/eukaryotic nucleolar NOL1/Nop2p, conserved site | Site | Conserved site |
| IPR023267 | RNA (C5-cytosine) methyltransferase | Family | Family |
| IPR023273 | RNA (C5-cytosine) methyltransferase, NOP2 | Family | Family |
| IPR029063 | S-adenosyl-L-methionine-dependent methyltransferase | Family | Homologous superfamily |
| IPR031341 | Ribosomal RNA small subunit methyltransferase F, N-terminal | Domain | Domain |