| Domain | Name | Category | Type |
| IPR001917 | Aminotransferase, class-II, pyridoxal-phosphate binding site | Site | Binding site |
| IPR004839 | Aminotransferase, class I/classII | Domain | Domain |
| IPR010961 | Tetrapyrrole biosynthesis, 5-aminolevulinic acid synthase | Domain | Domain |
| IPR015118 | 5-aminolevulinate synthase presequence | Domain | Domain |
| IPR015421 | Pyridoxal phosphate-dependent transferase, major domain | Family | Homologous superfamily |
| IPR015422 | Pyridoxal phosphate-dependent transferase, small domain | Family | Homologous superfamily |
| IPR015424 | Pyridoxal phosphate-dependent transferase | Family | Homologous superfamily |