4RUF Metal Transport date Nov 19, 2014
title Human K2p4.1 (Traaak) Potassium Channel, W262s Mutant
authors M.Lolicato, D.L.Jr.Minor
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_strain: Smd1163
symmetry Space Group: P 21 21 21
R_factor 0.297 R_Free 0.328
length a length b length c angle alpha angle beta angle gamma
88.053 127.982 130.406 90.00 90.00 90.00
method X-Ray Diffractionresolution 3.40 Å
ligand K enzyme
A, B

Primary referenceTransmembrane Helix Straightening and Buckling Underlies Activation of Mechanosensitive and Thermosensitive K2P Channels., Lolicato M, Riegelhaupt PM, Arrigoni C, Clark KA, Minor DL Jr, Neuron. 2014 Dec 17;84(6):1198-212. doi: 10.1016/j.neuron.2014.11.017. Epub 2014 , Dec 11. PMID:25500157
Data retrieval
  • Asymmetric unit, PDB entry: [header only] [complete with coordinates] (87 Kb) [Save to disk]
  • Biological Unit Coordinates (4ruf.pdb1.gz) 81 Kb
  • LPC: Ligand-Protein Contacts for 4RUF
  • CSU: Contacts of Structural Units for 4RUF
  • Structure Factors (315 Kb)
  • Retrieve 4RUF in mmCIF format [Save to disk]
  • SEQRES to COORDINATES correlation for 4RUF from S2C, [Save to disk]
  • Re-refined 4ruf structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models
  • View 4RUF 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 4RUF
  • Cartoon representation from PDB Cartoon
  • Ramachandran plot from PDBSum
  • Structure-derived information
  • Dipole moment, from Dipole Server at Weizmann Institute
  • Crystal Contacts, from CryCo at Weizmann Institute
  • 3D motif for 4RUF, from MSDmotif at EBI
  • Fold representative 4ruf from FSSP and Dali (Families of Structurally Similar Proteins)
  • Sequence-derived information
  • View one-letter amino acid or nucleotide sequence for each chain: [4ruf] [4ruf_B] [4ruf_A]
  • SWISS-PROT database:
  • Domain organization of by SWISSPFAM
  • Other resources with information on 4RUF
  • Community annotation for 4RUF at PDBWiki (http://pdbwiki.org)

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