1MRP

FERRIC-BINDING PROTEIN FROM HAEMOPHILUS INFLUENZAE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.174 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of Haemophilus influenzae Fe(+3)-binding protein reveals convergent evolution within a superfamily.

Bruns, C.M.Nowalk, A.J.Arvai, A.S.McTigue, M.A.Vaughan, K.G.Mietzner, T.A.McRee, D.E.

(1997) Nat.Struct.Mol.Biol. 4: 919-924


  • PubMed Abstract: 
  • The first crystal structure of the iron-transporter ferric ion-binding protein from Haemophilus influenzae (hFBP), at 1.6 A resolution, reveals the structural basis for iron uptake and transport required by several important bacterial pathogens. Para ...

    The first crystal structure of the iron-transporter ferric ion-binding protein from Haemophilus influenzae (hFBP), at 1.6 A resolution, reveals the structural basis for iron uptake and transport required by several important bacterial pathogens. Paradoxically, although hFBP belongs to a protein superfamily which includes human transferrin, iron binding in hFBP and transferrin appears to have developed independently by convergent evolution. Structural comparison of hFBP with other prokaryotic periplasmic transport proteins and the eukaryotic transferrins suggests that these proteins are related by divergent evolution from an anion-binding common ancestor, not from an iron-binding ancestor. The iron binding site of hFBP incorporates a water and an exogenous phosphate ion as iron ligands and exhibits nearly ideal octahedral metal coordination. FBP is highly conserved, required for virulence, and is a nodal point for free iron uptake in several Gram-negative pathogenic bacteria, thus providing a potential target for broad-spectrum antibacterial drug design against human pathogens such as H. influenzae, Neisseria gonorrhoeae, and Neisseria meningitidis.


    Related Citations: 
    • Coordination of Iron by the Ferric Iron-Binding Protein of Pathogenic Neisseria is Homologous to the Transferrins
      Nowalk, A.J.,Tencza, S.B.,Mietzner, T.A.
      (1994) Biochemistry 33: 12769
    • Biochemical Characterization of a Haemophilus Influenzae Periplasmic Iron Transport Operon
      Adhikari, P.,Kirby, S.D.,Nowalk, A.J.,Veraldi, K.L.,Schryvers, A.B.,Mietzner, T.A.
      (1995) J.Biol.Chem. 270: 25142


    Organizational Affiliation

    Department of Molecular Biology MB8, Scripps Research Institute, La Jolla, California 92037, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FERRIC IRON BINDING PROTEIN
A
309Haemophilus influenzae (strain ATCC 51907 / DSM 11121 / KW20 / Rd)Mutation(s): 0 
Gene Names: fbpA (fbp, hitA)
Find proteins for P35755 (Haemophilus influenzae (strain ATCC 51907 / DSM 11121 / KW20 / Rd))
Go to UniProtKB:  P35755
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
FE
Query on FE

Download SDF File 
Download CCD File 
A
FE (III) ION
Fe
VTLYFUHAOXGGBS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.174 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 132.194α = 90.00
b = 52.449β = 90.00
c = 41.255γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
TNTrefinement
PHASESphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-01-28
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance