4PDM
Crystal Structure of K+ selective NaK mutant in rubidium
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) | Potassium channel protein | polymer | 97 | 10771.7 | 2 | UniProt (Q81HW2) Pfam (PF07885) | Bacillus cereus | |
| 2 | C, D, E, G, H... (A, B) | RUBIDIUM ION | non-polymer | 85.5 | 6 | Chemie (RB) | |||
| 3 | F, J, K (A, B) | (4S)-2-METHYL-2,4-PENTANEDIOL | non-polymer | 118.2 | 3 | Chemie (MPD) | |||
| 4 | L, M (A, B) | water | water | 18.0 | 79 | Chemie (HOH) |
Sequence modifications
A, B: 20 - 110 (UniProt: Q81HW2)
| PDB | External Database | Details |
|---|---|---|
| Met 18 | - | initiating methionine |
| Ala 19 | - | expression tag |
| Tyr 66 | Asp 66 | engineered mutation |
| Asp 68 | Asn 68 | engineered mutation |
| Leu 111 | - | expression tag |
| Val 112 | - | expression tag |
| Pro 113 | - | expression tag |
| Arg 114 | - | expression tag |
Sequence viewer
Contents of the asymmetric unit
| Polymers | Number of chains | 2 |
| Total formula weight | 21543.3 | |
| Non-Polymers* | Number of molecules | 9 |
| Total formula weight | 867.3 | |
| All* | Total formula weight | 22410.7 |
