Escherichia coli
| Assembly | Physical composition | Protein state | Molecular copy count | Associated components | Data consistency |
|---|---|---|---|---|---|
| 1 | Protein monomer | Monomer | Protein 1 | SULFATE ION × 10 COBALAMIN × 1 water × 1 | Consistent with protein count |
| UniProt name | METH_ECOLI |
| Isoform | — |
| PDB entities | 1 |
| Chains and sequence ranges | Author chain A； PDBConstruct 1–577； UniProt 651–1227 |
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 | 1k7y |
| Deposition date deposition_date | 2001-10-22 |
| Structure title title | E. coli MetH C-terminal fragment (649-1227) |
| Keywords keywords | MOTION OF 4-HELIX BUNDLE, DOMAIN INTERACTIONS, TRANSFERASE; TRANSFERASE |
| 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） | 27.64 Å |
| Rg (electron density) | 26.62 Å |
| Total Rg | 27.26 Å |
| Atom count | 4707 |
| Residues | 577 |
| Excluded volume | 83176 ų |
| Maximum q | 0.500 Å⁻¹ |
| Domain ID domain_id | d1k7ya1 |
| Class class | a — All alpha proteins |
| Fold Fold fold | a.46 — Methionine synthase domain-like |
| Superfamily Superfamily superfamily | a.46.1 — Methionine synthase domain |
| Family Family family | a.46.1.1 — Methionine synthase domain |
| Domain ID domain_id | d1k7ya2 |
| Class class | c — Alpha and beta proteins (a/b) |
| Fold Fold fold | c.23 — Flavodoxin-like |
| Superfamily Superfamily superfamily | c.23.6 — Cobalamin (vitamin B12)-binding domain |
| Family Family family | c.23.6.1 — Cobalamin (vitamin B12)-binding domain |
| Domain ID domain_id | d1k7ya3 |
| Class class | d — Alpha and beta proteins (a+b) |
| Fold Fold fold | d.173 — Methionine synthase activation domain-like |
| Superfamily Superfamily superfamily | d.173.1 — Methionine synthase activation domain-like |
| Family Family family | d.173.1.1 — Methionine synthase SAM-binding domain |
| Domain ID domain_id | 1k7yA01 |
| Class class | 3 — Alpha Beta |
| Architecture architecture | 40 — 3-Layer(aba) Sandwich |
| Topology topology | 50 — Rossmann fold |
| Homologous superfamily homologous superfamily | 280 — Cobalamin-binding domain |
| Domain ID domain_id | 1k7yA02 |
| Class class | 3 — Alpha Beta |
| Architecture architecture | 10 — Roll |
| Topology topology | 196 — Cobalamin-dependent Methionine Synthase; domain 1 |
| Homologous superfamily homologous superfamily | 10 — Vitamin B12-dependent methionine synthase, activation domain |
| Domain ID domain_id | 1k7yA03 |
| Class class | 1 — Mainly Alpha |
| Architecture architecture | 10 — Orthogonal Bundle |
| Topology topology | 1240 — Methyltransferase, Methionine Synthase (B12-binding Domains); Chain A, domain 1 |
| Homologous superfamily homologous superfamily | 10 — Methionine synthase domain |
| Domain ID domain_id | 1k7yA04 |
| Class class | 1 — Mainly Alpha |
| Architecture architecture | 10 — Orthogonal Bundle |
| Topology topology | 288 — Cobalamin-dependent Methionine Synthase; domain 2 |
| Homologous superfamily homologous superfamily | 10 — Cobalamin-dependent Methionine Synthase, domain 2 |