| Domain | Name | Category | Type |
| IPR002077 | Voltage-dependent calcium channel, alpha-1 subunit | Family | Family |
| IPR005446 | Voltage-dependent calcium channel, L-type, alpha-1 subunit | Family | Family |
| IPR005450 | Voltage-dependent calcium channel, L-type, alpha-1S subunit | Family | Family |
| IPR005821 | Ion transport domain | Domain | Domain |
| IPR014873 | Voltage-dependent calcium channel, alpha-1 subunit, IQ domain | Domain | Domain |
| IPR027359 | Voltage-dependent channel domain superfamily | Family | Homologous superfamily |
| IPR031649 | Voltage-dependent L-type calcium channel, IQ-associated domain | Domain | Domain |