2NPK: An unusual twin-His arrangement in the pore of ammonia channels is essential for substrate conductance

PDB ID: 2NPKDownload
MMDB ID: 43109
PDB Deposition Date: 2006/10/27
Updated in MMDB: 2006/12
Experimental Method:
x-ray diffraction
Resolution: 2  Å
Source Organism:
Similar Structures:
Biological Unit for 2NPK: trimeric; determined by author and by software (PISA,PQS)
Molecular Components in 2NPK
Label Count Molecule
Proteins (3 molecules)
3
Ammonia Channel
(Gene symbol: amtB)
Molecule annotation
Chemicals and Non-standard biopolymers (15 molecules)
1
6
SULFATE IONSULFATE ION
2
3
ACETATE IONACETATE ION
3
3
IMIDAZOLEIMIDAZOLE
4
3
GLYCEROLGLYCEROL
* Click molecule labels to explore molecular sequence information.
Citing MMDB
Madej T, Lanczycki CJ, Zhang D, Thiessen PA, Geer RC, Marchler-Bauer A, Bryant SH. " MMDB and VAST+: tracking structural similarities between macromolecular complexes. Nucleic Acids Res. 2014 Jan; 42(Database issue):D297-303