3QK1
Crystal Structure of Enterokinase-like Trypsin Variant
Entity
| Entity ID | Chain ID | Description | Type | Chain length | Formula weight | Number of molecules | DB Name (Accession) | Biological source | Descriptive keywords |
| 1 | A (A) | Cationic trypsin | polymer | 229 | 24310.5 | 1 | UniProt (P00760) Pfam (PF00089) | Bos taurus (bovine) | Beta-trypsin, Alpha-trypsin chain 1, Alpha-trypsin chain 2 |
| 2 | B (A) | CALCIUM ION | non-polymer | 40.1 | 1 | Chemie (CA) | |||
| 3 | C, D, E (A) | SULFATE ION | non-polymer | 96.1 | 3 | Chemie (SO4) | |||
| 4 | F, G, H, J (A) | 1,2-ETHANEDIOL | non-polymer | 62.1 | 4 | Chemie (EDO) | |||
| 5 | I (A) | IMIDAZOLE | non-polymer | 69.1 | 1 | Chemie (IMD) | |||
| 6 | K (A) | GLYCEROL | non-polymer | 92.1 | 1 | Chemie (GOL) | |||
| 7 | L (A) | BENZAMIDINE | non-polymer | 120.2 | 1 | Chemie (BEN) | |||
| 8 | M (A) | water | water | 18.0 | 126 | Chemie (HOH) |
Sequence modifications
A: 16 - 245 (UniProt: P00760)
| PDB | External Database | Details |
|---|---|---|
| Lys 96 | Ser 101 | engineered mutation |
| Arg 97 | Asn 102 | engineered mutation |
| Arg 98 | Thr 103 | engineered mutation |
| Lys 99 | Leu 104 | engineered mutation |
| His 246 | - | expression tag |
| His 247 | - | expression tag |
| His 248 | - | expression tag |
| His 249 | - | expression tag |
| His 250 | - | expression tag |
| His 251 | - | expression tag |
Sequence viewer
Contents of the asymmetric unit
| Polymers | Number of chains | 1 |
| Total formula weight | 24310.5 | |
| Non-Polymers* | Number of molecules | 11 |
| Total formula weight | 857.9 | |
| All* | Total formula weight | 25168.3 |
