2NS1	Transport Protein Signaling Protein	date	Nov 02, 2006
title	Crystal Structure Of The E. Coli Ammonia Channel Amtb Comple The Signal Transduction Protein Glnk
authors	F.Gruswitz, J.O'Connell Iii, R.M.Stroud, Center For Structures Membrane Proteins (Csmp)
compound		source
Molecule: Ammonia Channel Chain: A Fragment: Residues 23-428 Synonym: Ammonia Transporter Engineered: Yes		Organism_scientific: Escherichia Coli Organism_taxid: 83333 Strain: K12 Gene: Amtb Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_strain: C43 Expression_system_vector_type: Plasmid Expression_system_plasmid: Pet29b
Molecule: Nitrogen Regulatory Protein P-II 2 Chain: B Engineered: Yes Mutation: Yes		Organism_scientific: Escherichia Coli Organism_taxid: 83333 Strain: K12 Gene: Glnk Expression_system: Escherichia Coli Bl21(De3) Expression_system_taxid: 469008 Expression_system_strain: Bl21(De3) Expression_system_vector_type: Plasmid Expression_system_plasmid: Pet47b
symmetry	Space Group: H 3 2	R_factor 0.162 R_Free 0.198
crystal cell	length a length b length c angle alpha angle beta angle gamma 102.032 102.032 363.849 90.00 90.00 120.00
method	X-Ray Diffraction	resolution	1.96 Å
ligand	ADP, BOG, TRS	enzyme
Gene Ontology	Chain Function Process Component A B enzyme regulator activity
Primary reference	Inhibitory complex of the transmembrane ammonia channel, AmtB, and the cytosolic regulatory protein, GlnK, at 1.96 A., Gruswitz F, O'connell J 3rd, Stroud RM, Proc Natl Acad Sci U S A. 2007 Jan 2;104(1):42-7. Epub 2006 Dec 26. PMID:17190799

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (100 Kb) [Save to disk] Biological Unit Coordinates (2ns1.pdb1.gz) 275 Kb LPC: Ligand-Protein Contacts for 2NS1 CSU: Contacts of Structural Units for 2NS1 Likely Quarternary Molecular Structure file(s) for 2NS1 Structure Factors (812 Kb) Retrieve 2NS1 in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 2NS1 from S2C, [Save to disk] Re-refined 2ns1 structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 2NS1 in 3D

Proteopedia, because life has more than 2D. On Jmol, a nice Rasmol like molecule viewer. This is good for easiest viewing of basic structure. On FirstGlance, an excellent tool for a guided tour on the structure components, by E. Martz.

Visual 3D analysis of 2NS1

Ramachandran plot from PDBSum

Structure-derived information

Electron Density related parameters from EDS Electron Density Server, at Upsala Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 2NS1, from MSDmotif at EBI

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [2ns1_B] [2ns1_A] [2ns1] SWISS-PROT database: [P69681] [P0AC55] Belongs to the ammonium transporter channel (amt) family according to TCDB. Domain organization of [AMTB_ECOLI] [GLNK_ECOLI] by SWISSPFAM Domain found in 2NS1: [P-II ] by SMART

Other resources with information on 2NS1

Community annotation for 2NS1 at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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