3LZL

Crystal Structure Analysis of the as-solated P19 protein from Campylobacter jejuni at 1.45 A at pH 9.0

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.187 
  • R-Value Work: 0.141 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history. 

Literature

Structure and Function of P19, a High-Affinity Iron Transporter of the Human Pathogen Campylobacter jejuni.

Chan, A.C., Doukov, T.I., Scofield, M., Tom-Yew, S.A., Ramin, A.B., Mackichan, J.K., Gaynor, E.C., Murphy, M.E.

(2010) J.Mol.Biol. 401: 590-604

  • DOI: 10.1016/j.jmb.2010.06.038
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • Campylobacter jejuni, a major cause of acute bacterial diarrhea in humans, expresses numerous proteins to import diverse forms of essential iron. The expression of p19 and an adjacent iron transporter homologue (ftr1) is strongly induced upon iron li ...

    Campylobacter jejuni, a major cause of acute bacterial diarrhea in humans, expresses numerous proteins to import diverse forms of essential iron. The expression of p19 and an adjacent iron transporter homologue (ftr1) is strongly induced upon iron limitation, suggesting a function in iron acquisition. Here, we show that the loss of P19 alone is detrimental to growth on iron-restricted media. Furthermore, metal binding analysis demonstrates that recombinant P19 has distinct copper and iron binding sites. Crystal structures of P19 have been solved to 1.41 A resolution, revealing an immunoglobulin-like fold. A P19 homodimer in which both monomers contribute ligands to two equivalent copper sites located adjacent to methionine-rich patches is observed. Copper coordination occurs via three histidine residues (His42, His95, and His132) and Met88. A solvent channel lined with conserved acidic residues leads to the copper site. Soaking crystals with a solution of manganese as iron analog reveals a second metal binding site in this solvent channel (metal-metal distance, 7.7 A). Glu44 lies between the metal sites and displays multiple conformations in the crystal structures, suggesting a role in regulating metal-metal interaction. Dimerization is shown to be metal dependent in vitro and is detected in vivo by cross-linking.

    Organizational Affiliation: 

    Department of Microbiology and Immunology, Life Sciences Institute, 2350 Health Sciences Mall, The University of British Columbia, Vancouver, BC, Canada V6T 1Z3.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
P19 protein
A, B
159Campylobacter jejuni subsp. jejuni serotype O:23/36 (strain 81-176)Mutation(s): 0 
Find proteins for A0A0H3PA01 (Campylobacter jejuni subsp. jejuni serotype O:23/36 (strain 81-176))
Go to UniProtKB:  A0A0H3PA01
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4
Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CU
Query on CU
Download SDF File 
Download CCD File 
A, B
COPPER (II) ION
Cu
JPVYNHNXODAKFH-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.187 
  • R-Value Work: 0.141 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 54.533α = 90.00
b = 73.545β = 90.00
c = 75.060γ = 90.00
Software Package:
Software NamePurpose
Blu-Icedata collection
XDSdata reduction
XSCALEdata scaling
REFMACrefinement
REFMACphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-07-21
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance