1PX4
E. COLI (LACZ) BETA-GALACTOSIDASE (G794A) WITH IPTG BOUND
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 | beta-galactosidase | polymer | 1023 | 116520.3 | 4 | UniProt (P00722) Pfam (PF02837) Pfam (PF00703) Pfam (PF02836) Pfam (PF16353) Pfam (PF02929) In PDB | Escherichia coli | Lactase |
| 2 | D, A, B, C | MAGNESIUM ION | non-polymer | 24.3 | 16 | Chemie (MG) | |||
| 3 | D, A, B, C | SODIUM ION | non-polymer | 23.0 | 16 | Chemie (NA) | |||
| 4 | D, A, B, C | 1-methylethyl 1-thio-beta-D-galactopyranoside | non-polymer | 238.3 | 4 | Chemie (IPT) | |||
| 5 | A, B, C, D | DIMETHYL SULFOXIDE | non-polymer | 78.1 | 94 | Chemie (DMS) | |||
| 6 | water | water | 18.0 | 3813 | Chemie (HOH) |
Sequence modifications
A, B, C, D: 9 - 1023 (UniProt: P00722)
| PDB | External Database | Details |
|---|---|---|
| Gly 1 | - | cloning artifact |
| Ser 2 | - | cloning artifact |
| His 3 | - | cloning artifact |
| Met 4 | - | cloning artifact |
| Leu 5 | - | cloning artifact |
| Glu 6 | - | cloning artifact |
| Asp 7 | - | cloning artifact |
| Pro 8 | - | cloning artifact |
| Ala 794 | Gly 794 | engineered mutation |
Sequence viewer
Contents of the asymmetric unit
| Polymers | Number of chains | 4 |
| Total formula weight | 466081.1 | |
| Non-Polymers* | Number of molecules | 130 |
| Total formula weight | 9054.4 | |
| All* | Total formula weight | 475135.5 |
