1R3J potassium channel KcsA-Fab complex in high concentration of Tl+ date
authors Zhou, Y., MacKinnon, R.
compound source
R_Free 0.228
length a length b length c angle alpha angle beta angle gamma
method X-Ray Diffractionresolution 1.90
ligand DGA, F09, TL enzyme
related structures by homologous chain: 1K4C, 1NDG, 1YEC, 1YEI


Primary referenceThe 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] (96 Kb) [Save to disk]
  • Biological Unit Coordinates (1r3j.pdb1.gz) 347 Kb
  • LPC: Ligand-Protein Contacts for 1R3J
  • CSU: Contacts of Structural Units for 1R3J
  • Likely Quarternary Molecular Structure file(s) for 1R3J
  • Structure Factors (1630 Kb)
  • Retrieve 1R3J in mmCIF format [Save to disk]
  • SEQRES to COORDINATES correlation for 1R3J from S2C, [Save to disk]
  • Re-refined 1r3j structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models
  • View 1R3J 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 1R3J
  • Cartoon representation from PDB Cartoon
  • 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
  • Crystal Contacts, from CryCo at Weizmann Institute
  • 3D motif for 1R3J, from MSDmotif at EBI
  • Classification of representative domains in scop (Structural Classification of Proteins)
        - Domain d1r3ja1, region A:1-107 [Jmol] [rasmolscript] [script source]
        - Domain d1r3ja2, region A:108-212 [Jmol] [rasmolscript] [script source]
        - Domain d1r3jb1, region B:1-118 [Jmol] [rasmolscript] [script source]
        - Domain d1r3jb2, region B:119-219 [Jmol] [rasmolscript] [script source]
        - Domain d1r3jc_, region C [Jmol] [rasmolscript] [script source]
  • Fold representative 1r3j from FSSP and Dali (Families of Structurally Similar Proteins)
  • 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: [1r3j] [1r3j_C] [1r3j_B] [1r3j_A]
  • 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 1R3J: [IG_like] [IGv ] by SMART
  • Other resources with information on 1R3J
  • Community annotation for 1R3J at PDBWiki (http://pdbwiki.org)
  • MMDB (Entrez's Structure Database)
  • Movements, Movies and Images
  • Images from IMB Jena Image Library of Biological Macromolecules.

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