| Domain | Name | Category | Type |
| IPR003618 | Transcription elongation factor S-II, central domain | Domain | Domain |
| IPR017923 | Transcription factor IIS, N-terminal | Domain | Domain |
| IPR035100 | Transcription elongation factor, IIS-type | Family | Family |
| IPR035441 | TFIIS/LEDGF domain superfamily | Family | Homologous superfamily |
| IPR036575 | Transcription elongation factor S-II, central domain superfamily | Family | Homologous superfamily |