4I9W	Metal Transport	date	Dec 05, 2012
title	Human Two Pore Domain K+ Channel Traak (K2p4.1) - Fab Comple Structure
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: K2p4.1, Kcnk4, Traak Expression_system: Pichia Pastoris Expression_system_taxid: 4922 Expression_system_vector_type: Plasmid Expression_system_plasmid: Ppicz-B
Molecule: Antibody Fab Fragment Light Chain Chain: D, F Engineered: Yes		Organism_scientific: Mus Musculus Organism_common: Mouse Organism_taxid: 10090 Expression_system: Mus Musculus Expression_system_taxid: 10090
Molecule: Antibody Fab Fragment Heavy Chain Chain: E, G Engineered: Yes		Organism_scientific: Mus Musculus Organism_common: Mouse Organism_taxid: 10090 Expression_system: Mus Musculus Expression_system_taxid: 10090
symmetry	Space Group: P 1 21 1	R_factor 0.201 R_Free 0.236
crystal cell	length a length b length c angle alpha angle beta angle gamma 80.887 138.905 97.461 90.00 94.87 90.00
method	X-Ray Diffraction	resolution	2.75 Å
ligand	CA, K	enzyme
Gene Ontology	Chain Function Process Component A, B
Primary reference	Domain-swapped chain connectivity and gated membrane access in a Fab-mediated crystal of the human TRAAK K+ channel., Brohawn SG, Campbell EB, Mackinnon R, Proc Natl Acad Sci U S A. 2013 Feb 5;110(6):2129-34. doi:, 10.1073/pnas.1218950110. Epub 2013 Jan 22. PMID:23341632

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (464 Kb) [Save to disk] Biological Unit Coordinates (4i9w.pdb1.gz) 453 Kb LPC: Ligand-Protein Contacts for 4I9W CSU: Contacts of Structural Units for 4I9W Structure Factors (1242 Kb) Retrieve 4I9W in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 4I9W from S2C, [Save to disk] Re-refined 4i9w structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

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Visual 3D analysis of 4I9W

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Structure-derived information

Dipole moment, from Dipole Server at Weizmann Institute Crystal Contacts, from CryCo at Weizmann Institute 3D motif for 4I9W, from MSDmotif at EBI Fold representative 4i9w from FSSP and Dali (Families of Structurally Similar Proteins)

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [4i9w_D] [4i9w] [4i9w_B] [4i9w_G] [4i9w_F] [4i9w_E] [4i9w_A] SWISS-PROT database: Domain organization of by SWISSPFAM Domains found in 4I9W: [IG_like] [IGv ] by SMART

Other resources with information on 4I9W

Community annotation for 4I9W at PDBWiki (http://pdbwiki.org)

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