An unusual twin-His arrangement in the pore of ammonia channels is essential for substrate conductance DOI:10.2210/pdb2npk/pdb

2NPK   Display Files  close FASTA Sequence PDB File PDB File (Header) mmCIF File mmCIF File (Header) PDBML/XML File PDBML/XML File (Header)   Download Files  close FASTA Sequence PDB File (Text) PDB File (gz) mmCIF File mmCIF File (gz) PDBML/XML File PDBML/XML File (gz) Structure Factor (Text) Structure Factor (gz) Biological Assembly (gz) (A+S)   Share this Page  close Facebook Twitter LinkedIn Email Link this Page

Primary Citation       Related Citations in PDB Entry (REMARK 1) Hide     Molecular Description Hide Classification: Transport Protein Structure Weight: 44730.34 Molecule: Ammonia channel Polymer: 1 Type: protein Length: 424 Chains: A Mutation: H168A/H318A Organism Escherichia coli Gene Names amtB ybaG b0451 JW0441 UniProtKB:   Protein Feature View | Search PDB | P69681         Source Hide Polymer: 1 Scientific Name: Escherichia coli   Taxonomy   Expression System: Escherichia coli       Related PDB Entries Hide Identifier Details 1U7G  Triple mutant of AmtB  1XQE  Wild-type AmtB in the presence of ammonium space group R3  1XQF  Wild-type AmtB in the presence of magnesium  2NMR  AmtB(wild-type) in the presence of ammonium space group P63  2NOP  AmtB(wild-type) in the presence of ammonium space group P63 with imidazole  2NOW  AmtB(H168E) in the presence of ammonium space group P63  2NPC  AmtB(H168A) in the presence of ammonium space group P63 with imidazole  2NPD  AmtB(H168F) in the presence of ammonium space group P63 with imidazole  2NPE  AmtB(H318A) space group P63  2NPG  AmtB(H318F) in the presence of ammonium space group P63  2NPJ  AmtB(H318F) in the presence of ammonium space group P63 with imidazole      Ligand Chemical Component Hide Identifier Formula Name Interactions ACT Search  Download  C2 H3 O2 ACETATE ION   Ligand Explorer GOL Search  Download  C3 H8 O3 GLYCEROL   Ligand Explorer IMD Search  Download  C3 H5 N2 IMIDAZOLE   Ligand Explorer SO4 Search  Download  O4 S SULFATE ION   Ligand Explorer     External Domain Annotations Hide CATH Classification v3.4.0: 1 Domain - data from CATH   Pfam Classification: 1 Domain - data from Pfam   GO Terms: 9 Terms - data from GO      Structural Biology Knowledgebase Data Hide     Data in orange boxes are gathered from external resources (when available). Reset Layout

Biological Assembly            View in 3D More Images... Biological assembly 1 assigned by authors and generated by PISA,PQS (software) Downloadable viewers: Simple Viewer Protein Workshop Ligand Explorer Kiosk Viewer Other Viewers  KiNG WebMol QuickPDB FirstGlance         MyPDB Personal Annotations Hide     Deposition Summary Hide Authors:   Lupo, D.,  Winkler, F.K. Deposition:   2006-10-27 Release:   2006-11-14 Last Modified (REVDAT):   2011-07-13     Revision History    Hide Mouse over text for details 2011-07-13 Biological assembly 2011-07-13 Version format compliance     Experimental Details Hide Method:   X-RAY DIFFRACTION Exp. Data:   Structure Factors EDS   Resolution[Å]:   2.00 R-Value: 0.166 (obs.) R-Free: 0.190 Space Group: P 63 Unit Cell:   Length [Å] Angles [°] a = 109.92 α = 90.00  b = 109.92 β = 90.00  c = 84.20 γ = 120.00