Escherichia coli
| Assembly | Physical composition | Protein state | Molecular copy count | Associated components | Data consistency |
|---|---|---|---|---|---|
| 1 | Protein homooligomer | Homooligomer | Protein 2 | water × 2 | Consistent with protein count |
| UniProt name | GYRA_ECOLI |
| Isoform | — |
| PDB entities | 1 |
| Chains and sequence ranges | Author chain A； PDBConstruct 1–493； UniProt 30–522 |
The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.
| Entry ID entry_id | 1ab4 |
| Deposition date deposition_date | 1997-02-03 |
| Structure title title | 59KDA FRAGMENT OF GYRASE A FROM E. COLI |
| Keywords keywords | TOPOISOMERASE II, GYRASE, SUPERCOILING DNA, TOPOISOMERASE; TOPOISOMERASE |
| Experimental Method method | X-RAY DIFFRACTION |
This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.
Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)
| Rg（Guinier） | 37.62 Å |
| Rg (electron density) | 37.12 Å |
| Total Rg | 37.46 Å |
| Atom count | 7542 |
| Residues | 954 |
| Excluded volume | 134540 ų |
| Maximum q | 0.500 Å⁻¹ |
| Domain ID domain_id | d1ab4a_ |
| Class class | e — Multi-domain proteins (alpha and beta) |
| Fold Fold fold | e.11 — Type II DNA topoisomerase C-terminal domain-like |
| Superfamily Superfamily superfamily | e.11.1 — Type II DNA topoisomerase C-terminal domain-like |
| Family Family family | e.11.1.1 — Type II DNA topoisomerase C-terminal domain-like |
| Domain ID domain_id | 1ab4A01 |
| Class class | 3 — Alpha Beta |
| Architecture architecture | 90 — Alpha-Beta Complex |
| Topology topology | 199 — Topoisomerase II; domain 5 |
| Homologous superfamily homologous superfamily | 10 — Topoisomerase II, domain 5 |
| Domain ID domain_id | 1ab4A02 |
| Class class | 3 — Alpha Beta |
| Architecture architecture | 30 — 2-Layer Sandwich |
| Topology topology | 1360 — Gyrase A; domain 2 |
| Homologous superfamily homologous superfamily | 40 — |
| Domain ID domain_id | 1ab4A03 |
| Class class | 1 — Mainly Alpha |
| Architecture architecture | 10 — Orthogonal Bundle |
| Topology topology | 268 — Topoisomerase; domain 3 |
| Homologous superfamily homologous superfamily | 10 — Topoisomerase, domain 3 |