| IPR010146 | CRISPR-associated protein, Csn2-type | Family |
| IPR038600 | CRISPR-associated protein Csn2 superfamily | Homologous Superfamily |
| IPR002729 | CRISPR-associated protein Cas1 | Family |
| IPR019855 | CRISPR-associated protein Cas1, NMENI subtype | Family |
| IPR042206 | CRISPR-associated endonuclease Cas1, C-terminal domain | Homologous Superfamily |
| IPR050646 | CRISPR-associated endonuclease Cas1 | Family |
M, N, Q [auth U], T [auth V] | IPR019199 | Virulence-associated protein D / CRISPR associated protein Cas2 | Family |
M, N, Q [auth U], T [auth V] | IPR021127 | CRISPR-associated endonuclease Cas2 | Family |
U [auth S], V [auth T] | IPR036397 | Ribonuclease H superfamily | Homologous Superfamily |
U [auth S], V [auth T] | IPR032240 | CRISPR-associated endonuclease Cas9, REC lobe | Domain |
U [auth S], V [auth T] | IPR033114 | Cas9-type HNH domain | Domain |
U [auth S], V [auth T] | IPR055228 | Cas9, RuvC domain | Domain |
U [auth S], V [auth T] | IPR028629 | CRISPR-associated endonuclease Cas9 | Family |
U [auth S], V [auth T] | IPR003615 | HNH nuclease | Domain |
U [auth S], V [auth T] | IPR032237 | CRISPR-associated endonuclease Cas9, PAM-interacting domain | Domain |