2GSK

Structure of the BtuB:TonB Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.197 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Outer membrane active transport: structure of the BtuB:TonB complex

Shultis, D.D.Purdy, M.D.Banchs, C.N.Wiener, M.C.

(2006) Science 312: 1396-1399

  • DOI: 10.1126/science.1127694
  • Primary Citation of Related Structures:  
    2GSK

  • PubMed Abstract: 
  • In Gram-negative bacteria, the import of essential micronutrients across the outer membrane requires a transporter, an electrochemical gradient of protons across the inner membrane, and an inner membrane protein complex (ExbB, ExbD, TonB) that couples the proton-motive force to the outer membrane transporter ...

    In Gram-negative bacteria, the import of essential micronutrients across the outer membrane requires a transporter, an electrochemical gradient of protons across the inner membrane, and an inner membrane protein complex (ExbB, ExbD, TonB) that couples the proton-motive force to the outer membrane transporter. The inner membrane protein TonB binds directly to a conserved region, called the Ton-box, of the transporter. We solved the structure of the cobalamin transporter BtuB in complex with the C-terminal domain of TonB. In contrast to its conformations in the absence of TonB, the Ton-box forms a beta strand that is recruited to the existing beta sheet of TonB, which is consistent with a mechanical pulling model of transport.


    Related Citations: 
    • Crystallization and preliminary x-ray crystallographic analysis of the Escherichia coli outer membrane cobalamin transporter BtuB in complex with the carboxy-terminal domain of TonB
      Shultis, D.D., Purdy, M.D., Banchs, C.N., Wiener, M.C.
      (2006) Acta Crystallogr Sect F Struct Biol Cryst Commun --: --

    Organizational Affiliation

    Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, VA 22908, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Vitamin B12 transporter btuBA590Escherichia coliMutation(s): 0 
Gene Names: btuBbfecerdcrC
Membrane Entity: Yes 
UniProt
Find proteins for P06129 (Escherichia coli (strain K12))
Explore P06129 
Go to UniProtKB:  P06129
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
protein TONBB81Escherichia coliMutation(s): 0 
Gene Names: tonBexbA
Membrane Entity: Yes 
UniProt
Find proteins for P02929 (Escherichia coli (strain K12))
Explore P02929 
Go to UniProtKB:  P02929
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CNC
Query on CNC

Download Ideal Coordinates CCD File 
E [auth A]CO-CYANOCOBALAMIN
C63 H88 Co N14 O14 P
OEEKSCBDGPRZJZ-BYLSPCLQSA-N
 Ligand Interaction
LDA
Query on LDA

Download Ideal Coordinates CCD File 
F [auth A], G [auth A], H [auth A], I [auth A]LAURYL DIMETHYLAMINE-N-OXIDE
C14 H31 N O
SYELZBGXAIXKHU-UHFFFAOYSA-N
 Ligand Interaction
OCT
Query on OCT

Download Ideal Coordinates CCD File 
J [auth A], K [auth A], L [auth A]N-OCTANE
C8 H18
TVMXDCGIABBOFY-UHFFFAOYSA-N
 Ligand Interaction
HEX
Query on HEX

Download Ideal Coordinates CCD File 
M [auth A], N [auth A]HEXANE
C6 H14
VLKZOEOYAKHREP-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

Download Ideal Coordinates CCD File 
C [auth A], D [auth A]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.197 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 74.34α = 90
b = 82.439β = 90
c = 122.632γ = 90
Software Package:
Software NamePurpose
MAR345data collection
SERGUIdata collection
DENZOdata reduction
SCALEPACKdata scaling
MOLREPphasing
REFMACrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-06-13
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.3: 2017-10-18
    Changes: Refinement description
  • Version 1.4: 2017-11-01
    Changes: Refinement description