3GB7	Membrane Protein	date	Feb 18, 2009
title	Potassium Channel Kcsa-Fab Complex In Li+
authors	A.N.Thompson, K.Ilsoo, T.D.Panosian, T.M.Iverson, T.W.Allen, C.M.
compound		source
Molecule: Antibody Fab Fragment Heavy Chain Chain: A		Organism_scientific: Mus Musculus Organism_taxid: 10090
Molecule: Antibody Fab Fragment Light Chain Chain: B		Organism_scientific: Mus Musculus Organism_taxid: 10090
Molecule: Voltage-Gated Potassium Channel Chain: C Engineered: Yes Mutation: Yes		Organism_scientific: Streptomyces Lividans Organism_taxid: 1916 Gene: Kcsa, Skc1 Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_strain: Jm83 Expression_system_plasmid: Pask90
symmetry	Space Group: I 4	R_factor 0.239 R_Free 0.285
crystal cell	length a length b length c angle alpha angle beta angle gamma 157.064 157.064 75.616 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	2.85 Å
ligand	DGA, NI	enzyme
Gene Ontology	Chain Function Process Component C
Primary reference	Mechanism of potassium-channel selectivity revealed by Na(+) and Li(+) binding sites within the KcsA pore., Thompson AN, Kim I, Panosian TD, Iverson TM, Allen TW, Nimigean CM, Nat Struct Mol Biol. 2009 Dec;16(12):1317-24. Epub 2009 Nov 29. PMID:19946269

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (89 Kb) [Save to disk] Biological Unit Coordinates (3gb7.pdb1.gz) 326 Kb LPC: Ligand-Protein Contacts for 3GB7 CSU: Contacts of Structural Units for 3GB7 Structure Factors (159 Kb) Retrieve 3GB7 in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 3GB7 from S2C, [Save to disk] Re-refined 3gb7 structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 3GB7 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 3GB7

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 3GB7, from MSDmotif at EBI

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [3gb7_B] [3gb7] [3gb7_C] [3gb7_A] SWISS-PROT database: [P0A334] Belongs to the voltage-gated ion channel (vic) superfamily according to TCDB. Domain organization of [KCSA_STRLI] by SWISSPFAM Domains found in 3GB7: [IG_like] [IGv ] by SMART

Other resources with information on 3GB7

Community annotation for 3GB7 at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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