| PF01111 | Cyclin-dependent kinase regulatory subunit (CKS) | Cyclin-dependent kinase regulatory subunit | | Domain |
| PF12937 | F-box-like (F-box-like) | F-box-like | This is an F-box-like family. | Domain |
| PF03931 | Skp1 family, tetramerisation domain (Skp1_POZ) | Skp1 family, tetramerisation domain | | Domain |
| PF01466 | Skp1 family, dimerisation domain (Skp1) | Skp1 family, dimerisation domain | | Domain |
| PF02234 | Cyclin-dependent kinase inhibitor (CDI) | Cyclin-dependent kinase inhibitor | - | Family |
| PF02984 | Cyclin, C-terminal domain (Cyclin_C) | Cyclin, C-terminal domain | Cyclins regulate cyclin dependent kinases (CDKs). Swiss:P22674 is a Uracil-DNA glycosylase that is related to other cyclins [4]. Cyclins contain two domains of similar all-alpha fold, of which this family corresponds with the C-terminal domain. | Domain |
| PF00134 | Cyclin, N-terminal domain (Cyclin_N) | Cyclin, N-terminal domain | Cyclins regulate cyclin dependent kinases (CDKs). Swiss:P22674 is a Uracil-DNA glycosylase that is related to other cyclins [4]. Cyclins contain two domains of similar all-alpha fold, of which this family corresponds with the N-terminal domain. | Domain |