2GRX

Crystal structure of TonB in complex with FhuA, E. coli outer membrane receptor for ferrichrome


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.329 
  • R-Value Work: 0.284 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of TonB in complex with FhuA, E. coli outer membrane receptor.

Pawelek, P.D.Croteau, N.Ng-Thow-Hing, C.Khursigara, C.M.Moiseeva, N.Allaire, M.Coulton, J.W.

(2006) Science 312: 1399-1402

  • DOI: 10.1126/science.1128057

  • PubMed Abstract: 
  • The cytoplasmic membrane protein TonB spans the periplasm of the Gram-negative bacterial cell envelope, contacts cognate outer membrane receptors, and facilitates siderophore transport. The outer membrane receptor FhuA from Escherichia coli mediates ...

    The cytoplasmic membrane protein TonB spans the periplasm of the Gram-negative bacterial cell envelope, contacts cognate outer membrane receptors, and facilitates siderophore transport. The outer membrane receptor FhuA from Escherichia coli mediates TonB-dependent import of ferrichrome. We report the 3.3 angstrom resolution crystal structure of the TonB carboxyl-terminal domain in complex with FhuA. TonB contacts stabilize FhuA's amino-terminal residues, including those of the consensus Ton box sequence that form an interprotein beta sheet with TonB through strand exchange. The highly conserved TonB residue arginine-166 is oriented to form multiple contacts with the FhuA cork, the globular domain enclosed by the beta barrel.


    Organizational Affiliation

    Department of Microbiology and Immunology, McGill University, 3775 University Street, Montreal, Quebec, H3A 2B4, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ferrichrome-iron receptor
A, B
725Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: fhuA (tonA)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL
Sub Group: 
Beta-Barrel Membrane Proteins: Monomeric/Dimeric
Protein: 
FhuA, Ferrichrome-iron receptor without ligand
Find proteins for P06971 (Escherichia coli (strain K12))
Go to UniProtKB:  P06971
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Protein tonB
C, D
229Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: tonB (exbA)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL
Sub Group: 
Beta-Barrel Membrane Proteins: Monomeric/Dimeric
Protein: 
FhuA, Ferrichrome-iron receptor without ligand
Find proteins for P02929 (Escherichia coli (strain K12))
Go to UniProtKB:  P02929
Small Molecules
Ligands 10 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MYR
Query on MYR

Download SDF File 
Download CCD File 
B
MYRISTIC ACID
C14 H28 O2
TUNFSRHWOTWDNC-UHFFFAOYSA-N
 Ligand Interaction
PO4
Query on PO4

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Download CCD File 
A, B
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
DPO
Query on DPO

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A, B
DIPHOSPHATE
O7 P2
XPPKVPWEQAFLFU-UHFFFAOYSA-J
 Ligand Interaction
EAP
Query on EAP

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Download CCD File 
A, B
2-AMINO-VINYL-PHOSPHATE
C2 H6 N O4 P
KYMLMTPYCDIFEC-OWOJBTEDSA-N
 Ligand Interaction
FTT
Query on FTT

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A, B
3-HYDROXY-TETRADECANOIC ACID
3-HYDROXY-MYRISTIC ACID
C14 H28 O3
ATRNZOYKSNPPBF-CYBMUJFWSA-N
 Ligand Interaction
GCN
Query on GCN

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A, B
3-DEOXY-D-GLUCOSAMINE
C6 H13 N O4
SNDZDGQLFKEBLF-MOJAZDJTSA-N
 Ligand Interaction
FCI
Query on FCI

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Download CCD File 
A, B
FERRICROCIN-IRON
C28 H44 Fe N9 O13
FNBCUYMSQPYITB-JWBZYWNVDF
 Ligand Interaction
KDO
Query on KDO

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A, B
3-DEOXY-D-MANNO-OCT-2-ULOSONIC ACID
C8 H14 O8
NNLZBVFSCVTSLA-HXUQBWEZSA-N
 Ligand Interaction
DAO
Query on DAO

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A, B
LAURIC ACID
C12 H24 O2
POULHZVOKOAJMA-UHFFFAOYSA-N
 Ligand Interaction
GMH
Query on GMH

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Download CCD File 
A, B
L-GLYCERO-D-MANNO-HEPTOPYRANOSE
C7 H14 O7
BGWQRWREUZVRGI-QQABCQGCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.329 
  • R-Value Work: 0.284 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 234.320α = 90.00
b = 91.840β = 118.86
c = 138.510γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
CNSrefinement
ADSCdata collection
HKL-2000data scaling
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-06-13
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance