2NPJ
An unusual twin-His arrangement in the pore of ammonia channels is essential for substrate conductance
Entity
Entity ID | Chain ID | Description | Type | Chain length | Formula weight | Number of molecules | DB Name (Accession) | Biological source | Descriptive keywords |
1 | A | Ammonia channel | polymer | 424 | 44460.7 | 1 | UniProt (P69681) Pfam (PF00909) In PDB | Escherichia coli | Ammonia transporter |
2 | A | ACETATE ION | non-polymer | 59.0 | 1 | Chemie (ACT) | |||
3 | A | IMIDAZOLE | non-polymer | 69.1 | 2 | Chemie (IMD) | |||
4 | water | water | 18.0 | 97 | Chemie (HOH) |
Sequence modifications
A: 1 - 406 (UniProt: P69681)
PDB | External Database | Details |
---|---|---|
Phe 318 | His 340 | engineered mutation |
Asp 407 | - | expression tag |
Gln 408 | - | expression tag |
Ala 409 | - | expression tag |
Gln 410 | - | expression tag |
Gln 411 | - | expression tag |
Pro 412 | - | expression tag |
Ala 413 | - | expression tag |
Gln 414 | - | expression tag |
Ala 415 | - | expression tag |
Asp 416 | - | expression tag |
Leu 417 | - | expression tag |
Glu 418 | - | expression tag |
His 419 | - | expression tag |
His 420 | - | expression tag |
His 421 | - | expression tag |
His 422 | - | expression tag |
His 423 | - | expression tag |
His 424 | - | expression tag |
Sequence viewer
Contents of the asymmetric unit
Polymers | Number of chains | 1 |
Total formula weight | 44460.7 | |
Non-Polymers* | Number of molecules | 3 |
Total formula weight | 197.2 | |
All* | Total formula weight | 44658.0 |