1R3K	Membrane Protein	date	Oct 02, 2003
title	Potassium Channel Kcsa-Fab Complex In Low Concentration Of T
authors	Y.Zhou, R.Mackinnon
compound		source
Molecule: Antibody Fab Fragment Light Chain Chain: A		Organism_scientific: Mus Musculus Organism_common: House Mouse Organism_taxid: 10090
Molecule: Antibody Fab Fragment Heavy Chain Chain: B		Organism_scientific: Mus Musculus Organism_common: House Mouse Organism_taxid: 10090
Molecule: Voltage-Gated Potassium Channel Chain: C Engineered: Yes Mutation: Yes		Organism_scientific: Streptomyces Lividans Organism_taxid: 1916 Gene: Kcsa, Skc1, Sco7660, Sc10f4.33 Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_strain: Xl1blue Expression_system_vector_type: Plasmid Expression_system_plasmid: Pqe60
symmetry	Space Group: I 4	R_factor 0.238 R_Free 0.273
crystal cell	length a length b length c angle alpha angle beta angle gamma 154.180 154.180 75.050 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	2.80 Å
ligand	DGA, TL	enzyme
related structures	by homologous chain: 1CFT, 1JVM, 1R0A, 1ZA6, 2BOB
Gene Ontology	Chain Function Process Component A C
Primary reference	The occupancy of ions in the K+ selectivity filter: charge balance and coupling of ion binding to a protein conformational change underlie high conduction rates., Zhou Y, MacKinnon R, J Mol Biol 2003 Nov 7;333(5):965-75. PMID:14583193

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (87 Kb) [Save to disk] Biological Unit Coordinates (1r3k.pdb1.gz) 316 Kb LPC: Ligand-Protein Contacts for 1R3K CSU: Contacts of Structural Units for 1R3K Likely Quarternary Molecular Structure file(s) for 1R3K Structure Factors (186 Kb) Retrieve 1R3K in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1R3K from S2C, [Save to disk] Re-refined 1r3k structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1R3K 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 1R3K

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 1R3K, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1r3ka1, region A:1-107 [Jmol] [rasmolscript] [script source]     - Domain d1r3ka2, region A:108-212 [Jmol] [rasmolscript] [script source]     - Domain d1r3kb1, region B:1-118 [Jmol] [rasmolscript] [script source]     - Domain d1r3kb2, region B:119-219 [Jmol] [rasmolscript] [script source]     - Domain d1r3kc_, region C [Jmol] [rasmolscript] [script source] Class (fold), Architecture (subfold), Topology, Homologous superfamily from CATH Summaries and structural analyses of PDB data files from PDBSum Identification of Protein Pockets & Cavities at CASTp

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [1r3k_A] [1r3k] [1r3k_B] [1r3k_C] SWISS-PROT database: [P01837] [P0A334] Belongs to the voltage-gated ion channel (vic) superfamily according to TCDB. Domain organization of [IGKC_MOUSE] [KCSA_STRLI] by SWISSPFAM Domains found in 1R3K: [IG_like] [IGv ] by SMART

Other resources with information on 1R3K

Community annotation for 1R3K at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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