3WZN
Crystal structure of the core streptavidin mutant V21 (Y22S/N23D/S27D/Y83S/R84K/E101D/R103K/E116N) complexed with biotin at 1.3 A resolution
Entity
| Entity ID | Chain ID | Description | Type | Chain length | Formula weight | Number of molecules | DB Name (Accession) | Biological source | Descriptive keywords |
| 1 | A, B (A, B) | Streptavidin | polymer | 129 | 13227.2 | 2 | UniProt (P22629) Pfam (PF01382) | Streptomyces avidinii | |
| 2 | C, D (A, B) | BIOTIN | non-polymer | 244.3 | 2 | Chemie (BTN) | |||
| 3 | E (B) | SULFATE ION | non-polymer | 96.1 | 1 | Chemie (SO4) | |||
| 4 | F, G (A, B) | water | water | 18.0 | 222 | Chemie (HOH) |
Sequence modifications
A, B: 13 - 139 (UniProt: P22629)
| PDB | External Database | Details |
|---|---|---|
| Gly 11 | - | expression tag |
| Pro 12 | - | expression tag |
| Ser 22 | Tyr 46 | engineered mutation |
| Asp 23 | Asn 47 | engineered mutation |
| Asp 27 | Ser 51 | engineered mutation |
| Ser 83 | Tyr 107 | engineered mutation |
| Lys 84 | Arg 108 | engineered mutation |
| Asp 101 | Glu 125 | engineered mutation |
| Lys 103 | Arg 127 | engineered mutation |
| Asn 116 | Glu 140 | engineered mutation |
Sequence viewer
Contents of the asymmetric unit
| Polymers | Number of chains | 2 |
| Total formula weight | 26454.5 | |
| Non-Polymers* | Number of molecules | 3 |
| Total formula weight | 584.7 | |
| All* | Total formula weight | 27039.2 |
