| IPR044946 | Type I restriction modification DNA specificity domain superfamily | Homologous Superfamily |
| IPR051212 | Type I restriction enzyme S subunit | Family |
| IPR000055 | Type I restriction modification DNA specificity domain | Domain |
| IPR052916 | Type I Restriction Enzyme MTase Subunit | Family |
| IPR002052 | DNA methylase, N-6 adenine-specific, conserved site | Conserved Site |
| IPR003356 | DNA methylase, adenine-specific | Domain |
| IPR029063 | S-adenosyl-L-methionine-dependent methyltransferase superfamily | Homologous Superfamily |
| IPR029464 | Type I restriction enzyme R protein, N-terminal domain | Domain |