| Domain | Name | Category | Type |
| IPR005100 | NGN domain | Domain | Domain |
| IPR005824 | KOW | Domain | Domain |
| IPR006645 | NusG, N-terminal | Domain | Domain |
| IPR008991 | Translation protein SH3-like domain superfamily | Family | Homologous superfamily |
| IPR014722 | Ribosomal protein L2, domain 2 | Family | Homologous superfamily |
| IPR017071 | Transcription elongation factor Spt5, eukaryote | Family | Family |
| IPR022581 | Spt5 transcription elongation factor, N-terminal | Domain | Domain |
| IPR024945 | Spt5 C-terminal domain | Domain | Domain |
| IPR036735 | NusG, N-terminal domain superfamily | Family | Homologous superfamily |
| IPR039385 | NGN domain, eukaryotic | Domain | Domain |
| IPR039659 | Transcription elongation factor SPT5 | Family | Family |
| IPR041973 | Spt5, KOW domain repeat 1 | Domain | Domain |
| IPR041975 | Spt5, KOW domain repeat 2 | Domain | Domain |
| IPR041976 | Spt5, KOW domain repeat 3 | Domain | Domain |
| IPR041977 | Spt5, KOW domain repeat 4 | Domain | Domain |
| IPR041978 | Spt5, KOW domain repeat 5 | Domain | Domain |
| IPR041980 | Spt5, KOW domain repeat 6 | Domain | Domain |