1QFF

E. COLI FERRIC HYDROXAMATE UPTAKE RECEPTOR (FHUA) IN COMPLEX WITH BOUND FERRICHROME-IRON

• PDB DOI: https://doi.org/10.2210/pdb1QFF/pdb

• Classification: METAL TRANSPORT
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): No 
• Membrane Protein: Yes  PDBTMMemProtMDmpstruc


• Deposited: 1999-04-10 Released: 2000-07-26 
• Deposition Author(s): Ferguson, A.D., Hofmann, E., Coulton, J.W., Diederichs, K., Welte, W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.276 
• R-Value Work: 0.231 
• R-Value Observed: 0.231 

Literature

A conserved structural motif for lipopolysaccharide recognition by procaryotic and eucaryotic proteins.

Ferguson, A.D., Welte, W., Hofmann, E., Lindner, B., Holst, O., Coulton, J.W., Diederichs, K.

(2000) Structure 8: 585-592

• PubMed: 10873859 
• DOI: https://doi.org/10.1016/s0969-2126(00)00143-x
• Primary Citation of Related Structures:  
  1QFF, 1QFG


• PubMed Abstract: 
  

  Lipopolysaccharide (LPS), a lipoglycan from the outer membrane of Gram-negative bacteria, is an immunomodulatory molecule that stimulates the innate immune response. High levels of LPS cause excessive release of inflammatory mediators and are responsible for the septic shock syndrome. The interaction of LPS with its cognate binding proteins has not, as yet, been structurally elucidated.

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Organizational Affiliation: 

Fakultät für Biologie, Universität Konstanz, Konstanz, Germany.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 85.24 kDa 
• Atom Count: 5,972 
• Modelled Residue Count: 707 
• Deposited Residue Count: 725 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
FERRIC HYDROXAMATE UPTAKE RECEPTOR	A	725	Escherichia coli	Mutation(s): 0  Membrane Entity: Yes
UniProt
Find proteins for P06971 (Escherichia coli (strain K12)) Explore P06971  Go to UniProtKB:  P06971

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
alpha-D-glucopyranose-(1-3)-[alpha-D-galactopyranose-(1-6)]alpha-D-glucopyranose-(1-3)-L-glycero-alpha-D-manno-heptopyranose-(1-3)-L-glycero-alpha-D-manno-heptopyranose-(1-5)-[3-deoxy-alpha-D-manno-oct-2-ulopyranosonic acid-(2-4)]3-deoxy-alpha-D-manno-oct-2-ulopyranosonic acid-(2-6)-2-amino-2,3-dideoxy-alpha-D-glucoyranose-(1-6)-2-amino-2-deoxy-alpha-D-glucopyranose	B	9		N/A
Glycosylation Resources
GlyTouCan:  G65093ZO GlyCosmos:  G65093ZO

Small Molecules

Ligands 8 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
FCI	M [auth A]	FERRICROCIN-IRON C28 H44 Fe N9 O13 FNBCUYMSQPYITB-AFXYHRJJSA-N
FTT	E [auth A], F [auth A], G [auth A], I [auth A]	3-HYDROXY-TETRADECANOIC ACID C14 H28 O3 ATRNZOYKSNPPBF-CYBMUJFWSA-N
MYR	J [auth A]	MYRISTIC ACID C14 H28 O2 TUNFSRHWOTWDNC-UHFFFAOYSA-N
DDQ	N [auth A], O [auth A]	DECYLAMINE-N,N-DIMETHYL-N-OXIDE C12 H27 N O ZRKZFNZPJKEWPC-UHFFFAOYSA-N
DAO	H [auth A]	LAURIC ACID C12 H24 O2 POULHZVOKOAJMA-UHFFFAOYSA-N
DPO	K [auth A]	DIPHOSPHATE O7 P2 XPPKVPWEQAFLFU-UHFFFAOYSA-J
EAP	L [auth A]	2-AMINO-VINYL-PHOSPHATE C2 H6 N O4 P KYMLMTPYCDIFEC-OWOJBTEDSA-N
PO4	C [auth A], D [auth A]	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.276 
• R-Value Work: 0.231 
• R-Value Observed: 0.231 
• Space Group: P 6₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 171.4	α = 90
b = 171.4	β = 90
c = 85.7	γ = 120

Software Package:

Software Name	Purpose
XSCALE	data scaling
CNS	refinement
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2000-07-26 
Deposition Author(s): Ferguson, A.D., Hofmann, E., Coulton, J.W., Diederichs, K., Welte, W.

Revision History  

• Version 1.0: 2000-07-26
  Type: Initial release
  
• Version 1.1: 2008-04-26
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2012-06-20
  Changes: Non-polymer description
• Version 1.4: 2017-10-04
  Changes: Refinement description
• Version 1.5: 2018-06-27
  Changes: Data collection, Derived calculations
• Version 1.6: 2019-11-27
  Changes: Data collection, Database references, Derived calculations
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary
• Version 2.1: 2022-12-21
  Changes: Database references, Derived calculations, Structure summary