2GSK	Signaling Protein Membrane Protein	date	Apr 26, 2006
title	Structure Of The Btub:Tonb Complex
authors	D.D.Shultis, M.P.Purdy, C.N.Banchs, M.C.Wiener
compound		source
Molecule: Vitamin B12 Transporter Btub Chain: A Synonym: Btub; Cobalamin Receptor; Outer Membrane Cobalamin Translocator; Engineered: Yes		Organism_scientific: Escherichia Coli Organism_taxid: 562 Gene: Btub, Bfe, Cer, Dcrc Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_strain: Bl21(De3)Plyss Expression_system_vector_type: Plasmid Expression_system_plasmid: Pet22b
Molecule: Protein Tonb Chain: B Fragment: C-Terminal Domain Engineered: Yes		Organism_scientific: Escherichia Coli Organism_taxid: 562 Gene: Tonb, Exba Expression_system: Escherichia Coli Bl21(De3) Expression_system_taxid: 469008 Expression_system_strain: Bl21(De3) Expression_system_vector_type: Plasmid Expression_system_plasmid: Pgex4t1
symmetry	Space Group: P 21 21 21	R_factor 0.196 R_Free 0.251
crystal cell	length a length b length c angle alpha angle beta angle gamma 74.340 82.439 122.632 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	2.10 Å
ligand	CA, CNC, HEX, LDA, OCT	enzyme
Gene Ontology	Chain Function Process Component A vitamin transmembrane transp... B
Primary reference	Outer membrane active transport: structure of the BtuB:TonB complex., Shultis DD, Purdy MD, Banchs CN, Wiener MC, Science. 2006 Jun 2;312(5778):1396-9. PMID:16741124

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (120 Kb) [Save to disk] Biological Unit Coordinates (2gsk.pdb1.gz) 112 Kb LPC: Ligand-Protein Contacts for 2GSK CSU: Contacts of Structural Units for 2GSK Likely Quarternary Molecular Structure file(s) for 2GSK Structure Factors (335 Kb) Retrieve 2GSK in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 2GSK from S2C, [Save to disk] Re-refined 2gsk structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 2GSK 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 2GSK

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 3D motif for 2GSK, from MSDmotif at EBI

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [2gsk_B] [2gsk_A] [2gsk] SWISS-PROT database: [P06129] [P02929] Belongs to the outer membrane receptor (omr) family according to TCDB. Belongs to the tonb-exbb-exbd/tola-tolq-tolr outer membrane receptor energizers and stabilizers (tonb/tola) family according to TCDB. Domain organization of [BTUB_ECOLI] [TONB_ECOLI] by SWISSPFAM

Other resources with information on 2GSK

Community annotation for 2GSK at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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