3UM7 Metal Transport date Nov 12, 2011
title Crystal Structure Of The Human Two Pore Domain K+ Ion Channe (K2p4.1)
authors S.G.Brohawn, R.Mackinnon
compound source
Molecule: Potassium Channel Subfamily K Member 4
Chain: A, B
Fragment: Unp Residues 1-300
Synonym: Twik-Related Arachidonic Acid-Stimulated Potassium Protein, Traak, Two Pore Potassium Channel Kt4.1, Two Pore Channel Kt4.1;
Engineered: Yes
Mutation: Yes
Organism_scientific: Homo Sapiens
Organism_common: Human
Organism_taxid: 9606
Gene: Kcnk4, Traak
Expression_system: Pichia Pastoris
Expression_system_taxid: 4922
Expression_system_vector_type: Plasmid
Expression_system_plasmid: Ppicz-B
symmetry Space Group: P 21 21 21
R_factor 0.317 R_Free 0.323
length a length b length c angle alpha angle beta angle gamma
87.938 130.852 132.779 90.00 90.00 90.00
method X-Ray Diffractionresolution 3.31 Å
ligand K enzyme
A, B

Primary referenceCrystal structure of the human K2P TRAAK, a lipid- and mechano-sensitive K+ ion channel., Brohawn SG, del Marmol J, MacKinnon R, Science. 2012 Jan 27;335(6067):436-41. PMID:22282805
Data retrieval
  • Asymmetric unit, PDB entry: [header only] [complete with coordinates] (171 Kb) [Save to disk]
  • Biological Unit Coordinates (3um7.pdb1.gz) 164 Kb
  • LPC: Ligand-Protein Contacts for 3UM7
  • CSU: Contacts of Structural Units for 3UM7
  • Structure Factors (461 Kb)
  • Retrieve 3UM7 in mmCIF format [Save to disk]
  • SEQRES to COORDINATES correlation for 3UM7 from S2C, [Save to disk]
  • Re-refined 3um7 structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models
  • View 3UM7 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 3UM7
  • 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 3UM7, from MSDmotif at EBI
  • Fold representative 3um7 from FSSP and Dali (Families of Structurally Similar Proteins)
  • Sequence-derived information
  • View one-letter amino acid or nucleotide sequence for each chain: [3um7] [3um7_B] [3um7_A]
  • SWISS-PROT database:
  • Domain organization of by SWISSPFAM
  • Other resources with information on 3UM7
  • Community annotation for 3UM7 at PDBWiki (http://pdbwiki.org)
  • Movements, Movies and Images
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