Escherichia coli
| Assembly | Physical composition | Protein state | Molecular copy count | Associated components | Data consistency |
|---|---|---|---|---|---|
| 1 | Protein monomer | Monomer | Protein 1 | ZINC ION × 3 PHOSPHATE ION × 1 water × 1 | Consistent with protein count |
| UniProt name | END4_ECOLI |
| Isoform | — |
| PDB entities | 1 |
| Chains and sequence ranges | Author chain A； PDBConstruct 1–285； UniProt 1–285 |
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 | 2nqh |
| Deposition date deposition_date | 2006-10-31 |
| Structure title title | High Resolution crystal structure of Escherichia coli endonuclease IV (Endo IV) E261Q mutant |
| Keywords keywords | Tim-Barrel, trinuclear zinc center, HYDROLASE; HYDROLASE |
| 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） | 18.88 Å |
| Rg (electron density) | 17.84 Å |
| Total Rg | 18.69 Å |
| Atom count | 2174 |
| Residues | 279 |
| Excluded volume | 38305 ų |
| Maximum q | 0.500 Å⁻¹ |
| Domain ID domain_id | d2nqha_ |
| Class class | c — Alpha and beta proteins (a/b) |
| Fold Fold fold | c.1 — TIM beta/alpha-barrel |
| Superfamily Superfamily superfamily | c.1.15 — Xylose isomerase-like |
| Family Family family | c.1.15.1 — Endonuclease IV |
| Domain ID domain_id | 2nqhA00 |
| Class class | 3 — Alpha Beta |
| Architecture architecture | 20 — Alpha-Beta Barrel |
| Topology topology | 20 — TIM Barrel |
| Homologous superfamily homologous superfamily | 150 — Divalent-metal-dependent TIM barrel enzymes |