4WFF Metal Transport date Sep 15, 2014
title Human Traak K+ Channel In A K+ Bound Nonconductive Conformat
authors S.G.Brohawn, R.Mackinnon
compound source
Molecule: Potassium Channel Subfamily K Member 4
Chain: A, B
Synonym: Twik-Related Arachidonic Acid-Stimulated Potassium Protein,Traak,Two Pore Potassium Channel Kt4.1,Two Pore K(+ Kt4.1;
Engineered: Yes
Mutation: Yes
Organism_scientific: Homo Sapiens
Organism_common: Human
Organism_taxid: 9606
Gene: Kcnk4, Traak
Expression_system: Komagataella Pastoris
Expression_system_taxid: 4922

Molecule: Anti-Traak Antibody 13e9 Fab Fragment Light Chain
Chain: D, F
Engineered: Yes

Organism_scientific: Mus Musculus
Organism_taxid: 10090
Expression_system: Mus Musculus
Expression_system_taxid: 10090

Molecule: Anti-Traak Antibody 13e9 Fab Fragment Heavy Chain
Chain: E, G
Engineered: Yes

Organism_scientific: Mus Musculus
Organism_taxid: 10090
Expression_system: Mus Musculus
Expression_system_taxid: 10090
symmetry Space Group: P 1 21 1
R_factor 0.213 R_Free 0.245
length a length b length c angle alpha angle beta angle gamma
80.666 138.891 96.531 90.00 95.15 90.00
method X-Ray Diffractionresolution 2.50 Å
ligand CA, D10, K enzyme
A, B

Primary referencePhysical mechanism for gating and mechanosensitivity of the human TRAAK K+ channel., Brohawn SG, Campbell EB, MacKinnon R, Nature. 2014 Dec 4;516(7529):126-30. doi: 10.1038/nature14013. PMID:25471887
Data retrieval
  • Asymmetric unit, PDB entry: [header only] [complete with coordinates] (463 Kb) [Save to disk]
  • Biological Unit Coordinates (4wff.pdb1.gz) 452 Kb
  • LPC: Ligand-Protein Contacts for 4WFF
  • CSU: Contacts of Structural Units for 4WFF
  • Structure Factors (2091 Kb)
  • Retrieve 4WFF in mmCIF format [Save to disk]
  • Re-refined 4wff structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models
  • View 4WFF 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 4WFF
  • 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 4WFF, from MSDmotif at EBI
  • Fold representative 4wff from FSSP and Dali (Families of Structurally Similar Proteins)
  • Sequence-derived information
  • View one-letter amino acid or nucleotide sequence for each chain: [4wff] [4wff_B] [4wff_D] [4wff_F] [4wff_A] [4wff_E] [4wff_G]
  • SWISS-PROT database:
  • Domain organization of by SWISSPFAM
  • Domains found in 4WFF: [IG_like] [IGv ] by SMART
  • Other resources with information on 4WFF
  • Community annotation for 4WFF at PDBWiki (http://pdbwiki.org)

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