| Domain | Name | Category | Type |
| IPR000048 | IQ motif, EF-hand binding site | Site | Binding site |
| IPR001696 | Voltage gated sodium channel, alpha subunit | Family | Family |
| IPR005821 | Ion transport domain | Domain | Domain |
| IPR008052 | Voltage gated sodium channel, alpha-4 subunit, mammalian | Family | Family |
| IPR010526 | Sodium ion transport-associated | Domain | Domain |
| IPR027359 | Voltage-dependent channel domain superfamily | Family | Homologous superfamily |
| IPR043203 | Voltage-gated cation channel calcium and sodium | Family | Family |
| IPR044564 | Voltage-gated sodium channel alpha subunit, inactivation gate | Domain | Domain |