6X1Q
1.8 Angstrom resolution structure of b-galactosidase with a 200 kV cryoARM electron microscope
Entity
| Entity ID | Chain ID | Description | Type | Chain length | Formula weight | Number of molecules | DB Name (Accession) | Biological source | Descriptive keywords |
| 1 | A, B, C, D (A, B, C, D) | Beta-galactosidase | polymer | 1021 | 116181.0 | 4 | UniProt (P00722) Pfam (PF02837) Pfam (PF00703) Pfam (PF02836) Pfam (PF16353) Pfam (PF02929) | Escherichia coli (strain K12) | Beta-gal,Lactase |
| 2 | E, F, I, J, M... (A, B, C, D) | MAGNESIUM ION | non-polymer | 24.3 | 8 | Chemie (MG) | |||
| 3 | G, H, K, L, O... (A, B, C, D) | SODIUM ION | non-polymer | 23.0 | 8 | Chemie (NA) | |||
| 4 | U, V, W, X (A, B, C, D) | water | water | 18.0 | 3618 | Chemie (HOH) |
Sequence modifications
A, B, C, D: 2 - 1022 (UniProt: P00722)
| PDB | External Database | Details |
|---|---|---|
| Val 334 | Glu 335 | conflict |
| Val 871 | Glu 872 | conflict |
Sequence viewer
Contents of the asymmetric unit
| Polymers | Number of chains | 4 |
| Total formula weight | 464724.1 | |
| Non-Polymers* | Number of molecules | 16 |
| Total formula weight | 378.4 | |
| All* | Total formula weight | 465102.5 |
