3UKM Membrane Protein date Nov 09, 2011
title Crystal Structure Of The Human Two Pore Domain Potassium Ion K2p1 (Twik-1)
authors S.B.Long, A.N.Miller
compound source
Molecule: Potassium Channel Subfamily K Member 1
Chain: A, B, C, D
Fragment: Unp Residues 19-288
Synonym: Inward Rectifying Potassium Channel Protein Twik-1 Potassium Channel Kcno1;
Engineered: Yes
Mutation: Yes
Organism_scientific: Homo Sapiens
Organism_common: Human
Organism_taxid: 9606
Gene: Hoho1, K2p1 (Twik-1), Kcnk1, Kcno1, Twik1
Expression_system: Komagataella Pastoris
Expression_system_common: Pichia Pastoris
Expression_system_taxid: 4922
symmetry Space Group: P 1 21 1
R_factor 0.273 R_Free 0.279
length a length b length c angle alpha angle beta angle gamma
82.080 123.171 119.305 90.00 94.91 90.00
method X-Ray Diffractionresolution 3.40 Å
ligand K, UND enzyme
A, D, C, B

Primary referenceCrystal structure of the human two-pore domain potassium channel K2P1., Miller AN, Long SB, Science. 2012 Jan 27;335(6067):432-6. PMID:22282804
Data retrieval
  • Asymmetric unit, PDB entry: [header only] [complete with coordinates] (164 Kb) [Save to disk]
  • Biological Unit Coordinates (3ukm.pdb1.gz) 80 Kb
  • Biological Unit Coordinates (3ukm.pdb2.gz) 79 Kb
  • LPC: Ligand-Protein Contacts for 3UKM
  • CSU: Contacts of Structural Units for 3UKM
  • Structure Factors (210 Kb)
  • Retrieve 3UKM in mmCIF format [Save to disk]
  • SEQRES to COORDINATES correlation for 3UKM from S2C, [Save to disk]
  • Re-refined 3ukm structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models
  • View 3UKM 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 3UKM
  • 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 3UKM, from MSDmotif at EBI
  • Fold representative 3ukm from FSSP and Dali (Families of Structurally Similar Proteins)
  • Sequence-derived information
  • View one-letter amino acid or nucleotide sequence for each chain: [3ukm_D] [3ukm_C] [3ukm_A] [3ukm] [3ukm_B]
  • SWISS-PROT database:
  • Domain organization of by SWISSPFAM
  • Other resources with information on 3UKM
  • Community annotation for 3UKM at PDBWiki (http://pdbwiki.org)
  • Movements, Movies and Images
  • Images from IMB Jena Image Library of Biological Macromolecules.

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