| Domain | Description | Evalue | Bits | GA | Start | End |
| SAP | SAP domain | 4.3E-14 | 40 | 22.60 | 15 | 48 |
| SAP_new25 | SAP domain-containing new25 | 1.9E-05 | 12 | 26.30 | 17 | 52 |
| RSB_motif | RNSP1-SAP18 binding (RSB) motif | 0.18 | 0 | 27.10 | 44 | 73 |
| RSB_motif | RNSP1-SAP18 binding (RSB) motif | 1.2E-18 | 55 | 27.10 | 589 | 631 |