1QKC

ESCHERICHIA COLI FERRIC HYDROXAMATE UPTAKE RECEPTOR (FHUA) IN COMPLEX DELTA TWO-ALBOMYCIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.222 

wwPDB Validation 3D Report Full Report


This is version 1.6 of the entry. See complete history


Literature

Crystal structure of the antibiotic albomycin in complex with the outer membrane transporter FhuA.

Ferguson, A.D.Braun, V.Fiedler, H.P.Coulton, J.W.Diederichs, K.Welte, W.

(2000) Protein Sci 9: 956-963

  • DOI: 10.1110/ps.9.5.956
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • One alternative method for drug delivery involves the use of siderophore-antibiotic conjugates. These compounds represent a specific means by which potent antimicrobial agents, covalently linked to iron-chelating siderophores, can be actively transpo ...

    One alternative method for drug delivery involves the use of siderophore-antibiotic conjugates. These compounds represent a specific means by which potent antimicrobial agents, covalently linked to iron-chelating siderophores, can be actively transported across the outer membrane of gram-negative bacteria. These "Trojan Horse" antibiotics may prove useful as an efficient means to combat multi-drug-resistant bacterial infections. Here we present the crystallographic structures of the natural siderophore-antibiotic conjugate albomycin and the siderophore phenylferricrocin, in complex with the active outer membrane transporter FhuA from Escherichia coli. To our knowledge, this represents the first structure of an antibiotic bound to its cognate transporter. Albomycins are broad-host range antibiotics that consist of a hydroxamate-type iron-chelating siderophore, and an antibiotically active, thioribosyl pyrimidine moiety. As observed with other hydroxamate-type siderophores, the three-dimensional structure of albomycin reveals an identical coordination geometry surrounding the ferric iron atom. Unexpectedly, this antibiotic assumes two conformational isomers in the binding site of FhuA, an extended and a compact form. The structural information derived from this study provides novel insights into the diverse array of antibiotic moieties that can be linked to the distal portion of iron-chelating siderophores and offers a structural platform for the rational design of hydroxamate-type siderophore-antibiotic conjugates.


    Related Citations: 
    • An Internal Affinity-Tag for Purification and Crystallization of the Siderophore Receptor Fhua, Integral Outer Membrane Protein from Escherichia Coli K-12
      Ferguson, A.D., Breed, J., Diederichs, K., Welte, W., Coulton, J.W.
      (1998) Protein Sci 7: 1636
    • Siderophore-Mediated Iron Transport: Crystal Structure of Fhua with Bound Lipopolysaccharide
      Ferguson, A.D., Hofmann, E., Coulton, J.W., Diederichs, K., Welte, W.
      (1998) Science 282: 2215

    Organizational Affiliation

    Fachbereich Biologie, Universität Konstanz, Germany.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FERRIC HYDROXAMATE RECEPTOR
A
725Escherichia coli K-12Mutation(s): 0 
Gene Names: fhuAtonAb0150JW0146
Membrane protein
Mpstruc
Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL
Sub Group: 
Beta-Barrel Membrane Proteins: Monomeric/Dimeric
Protein: 
FhuA in complex with albomycin
Find proteins for P06971 (Escherichia coli (strain K12))
Go to UniProtKB:  P06971
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 11 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ALB
Query on ALB

Download CCD File 
A
DELTA-2-ALBOMYCIN A1
C37 H57 Fe N12 O18 S
RQZRKFJHRUDTLB-BMLDZKGGDD
 Ligand Interaction
FTT
Query on FTT

Download CCD File 
A
3-HYDROXY-TETRADECANOIC ACID
C14 H28 O3
ATRNZOYKSNPPBF-CYBMUJFWSA-N
 Ligand Interaction
KDO
Query on KDO

Download CCD File 
A
3-DEOXY-D-MANNO-OCT-2-ULOSONIC ACID
C8 H14 O8
NNLZBVFSCVTSLA-HXUQBWEZSA-N
 Ligand Interaction
GMH
Query on GMH

Download CCD File 
A
L-GLYCERO-D-MANNO-HEPTOPYRANOSE
C7 H14 O7
BGWQRWREUZVRGI-QQABCQGCSA-N
 Ligand Interaction
GLC
Query on GLC

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A
ALPHA-D-GLUCOSE
C6 H12 O6
WQZGKKKJIJFFOK-DVKNGEFBSA-N
 Ligand Interaction
GLA
Query on GLA

Download CCD File 
A
ALPHA D-GALACTOSE
C6 H12 O6
WQZGKKKJIJFFOK-PHYPRBDBSA-N
 Ligand Interaction
PA1
Query on PA1

Download CCD File 
A
2-amino-2-deoxy-alpha-D-glucopyranose
C6 H13 N O5
MSWZFWKMSRAUBD-UKFBFLRUSA-N
 Ligand Interaction
DPO
Query on DPO

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A
DIPHOSPHATE
O7 P2
XPPKVPWEQAFLFU-UHFFFAOYSA-J
 Ligand Interaction
GCN
Query on GCN

Download CCD File 
A
3-DEOXY-D-GLUCOSAMINE
C6 H13 N O4
SNDZDGQLFKEBLF-MOJAZDJTSA-N
 Ligand Interaction
PO4
Query on PO4

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A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
NI
Query on NI

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A
NICKEL (II) ION
Ni
VEQPNABPJHWNSG-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.222 
  • Space Group: P 61
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 171.8α = 90
b = 171.8β = 90
c = 86.35γ = 120
Software Package:
Software NamePurpose
CNSrefinement
XDSdata reduction
XSCALEdata scaling
CNSphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-06-05
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-01-17
    Changes: Data collection
  • Version 1.4: 2018-03-07
    Changes: Source and taxonomy
  • Version 1.5: 2019-10-09
    Changes: Data collection, Database references, Derived calculations, Other
  • Version 1.6: 2020-07-01
    Changes: Advisory, Data collection, Derived calculations