| Domain | Name | Category | Type |
| IPR004087 | K Homology domain | Domain | Domain |
| IPR004088 | K Homology domain, type 1 | Domain | Domain |
| IPR008395 | Agenet-like domain | Domain | Domain |
| IPR022034 | Fragile X-related 1 protein, C-terminal core | Domain | Domain |
| IPR032172 | Fragile X-related 1 protein, C-terminal region 1 | Domain | Domain |
| IPR032177 | Fragile X-related 1 protein, C-terminal region 3 | Domain | Domain |
| IPR036612 | K Homology domain, type 1 superfamily | Family | Homologous superfamily |
| IPR040148 | Fragile X mental retardation syndrome-related protein | Family | Family |
| IPR040472 | Synaptic functional regulator FMRP, KH0 domain | Domain | Domain |
| IPR041560 | Fxr1, tudor domain | Domain | Domain |