Escherichia coli
| Assembly | Physical composition | Protein state | Molecular copy count | Associated components | Data consistency |
|---|---|---|---|---|---|
| 1 | Protein heterocomplex | Heteromer | Protein 2 | Colicin-E2 × 1 （P04419） | Consistent with protein count |
| UniProt name | BTUB_ECOLI |
| Isoform | — |
| PDB entities | 1 |
| Chains and sequence ranges | Author chain A； PDBConstruct 1–594； UniProt 21–614 |
Escherichia coli
| Assembly | Physical composition | Protein state | Molecular copy count | Associated components | Data consistency |
|---|---|---|---|---|---|
| 1 | Protein heterocomplex | Heteromer | Protein 2 | Vitamin B12 transporter btuB × 1 （P06129） | Consistent with protein count |
| UniProt name | CEA2_ECOLI |
| Isoform | — |
| PDB entities | 2 |
| Chains and sequence ranges | Author chain B； PDBConstruct 1–135； UniProt 313–447 |
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 | 2ysu |
| Deposition date deposition_date | 2007-04-04 |
| Structure title title | Structure of the complex between BtuB and Colicin E2 receptor binding domain |
| Keywords keywords | BETA-BARREL, COILED-COIL, TRANSPORT PROTEIN-HYDROLASE COMPLEX; TRANSPORT PROTEIN/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） | 32.03 Å |
| Rg (electron density) | 32.69 Å |
| Total Rg | 33.01 Å |
| Atom count | 5537 |
| Residues | 699 |
| Excluded volume | 96497 ų |
| Maximum q | 0.500 Å⁻¹ |
| Domain ID domain_id | d2ysua1 |
| Class class | f — Membrane and cell surface proteins and peptides |
| Fold Fold fold | f.4 — Transmembrane beta-barrels |
| Superfamily Superfamily superfamily | f.4.3 — Porins |
| Family Family family | f.4.3.3 — Ligand-gated protein channel |
| Domain ID domain_id | d2ysub1 |
| Class class | h — Coiled coil proteins |
| Fold Fold fold | h.4 — Antiparallel coiled-coil |
| Superfamily Superfamily superfamily | h.4.9 — Colicin E3 receptor domain |
| Family Family family | h.4.9.1 — Colicin E3 receptor domain |
| Domain ID domain_id | 2ysuA01 |
| Class class | 2 — Mainly Beta |
| Architecture architecture | 170 — Beta Complex |
| Topology topology | 130 — Ferric Hydroxamate Uptake Protein; Chain A, domain 1 |
| Homologous superfamily homologous superfamily | 10 — TonB-dependent receptor, plug domain |
| Domain ID domain_id | 2ysuA02 |
| Class class | 2 — Mainly Beta |
| Architecture architecture | 40 — Beta Barrel |
| Topology topology | 170 — Maltoporin; Chain A |
| Homologous superfamily homologous superfamily | 20 — TonB-dependent receptor, beta-barrel domain |
| Domain ID domain_id | 2ysuB00 |
| Class class | 1 — Mainly Alpha |
| Architecture architecture | 10 — Orthogonal Bundle |
| Topology topology | 287 — Helix Hairpins |
| Homologous superfamily homologous superfamily | 620 — Helix Hairpins |