3IFX
Crystal structure of the Spin-labeled KcsA mutant V48R1
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) | Voltage-gated potassium channel | polymer | 129 | 13942.4 | 4 | UniProt (P0A334) Pfam (PF00520) Pfam (PF07885) | Streptomyces lividans | |
| 2 | E, G (A, B) | POTASSIUM ION | non-polymer | 39.1 | 2 | Chemie (K) | |||
| 3 | F, I, J, K (A, B, C, D) | S-[(1-oxyl-2,2,5,5-tetramethyl-2,5-dihydro-1H-pyrrol-3-yl)methyl] methanesulfonothioate | non-polymer | 264.4 | 4 | Chemie (MTN) | |||
| 4 | H (B) | TETRABUTYLAMMONIUM ION | non-polymer | 242.5 | 1 | Chemie (TBA) | |||
| 5 | L, M (B, D) | water | water | 18.0 | 3 | Chemie (HOH) |
Sequence modifications
A, B, C, D: 1 - 123 (UniProt: P0A334)
| PDB | External Database | Details |
|---|---|---|
| Cys 48 | Val 48 | engineered mutation |
| His 124 | - | expression tag |
| His 125 | - | expression tag |
| His 126 | - | expression tag |
| His 127 | - | expression tag |
| His 128 | - | expression tag |
| His 129 | - | expression tag |
Sequence viewer
Contents of the asymmetric unit
| Polymers | Number of chains | 4 |
| Total formula weight | 55769.5 | |
| Non-Polymers* | Number of molecules | 7 |
| Total formula weight | 1378.2 | |
| All* | Total formula weight | 57147.7 |
