5FHY

Crystal structure of FliD (HAP2) from Pseudomonas aeruginosa PAO1

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.249 
  • R-Value Observed: 0.251 

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Literature

Bacterial flagellar capping proteins adopt diverse oligomeric states.

Postel, S., Deredge, D., Bonsor, D.A., Yu, X., Diederichs, K., Helmsing, S., Vromen, A., Friedler, A., Hust, M., Egelman, E.H., Beckett, D., Wintrode, P.L., Sundberg, E.J.

(2016) Elife 5

  • DOI: 10.7554/eLife.18857
  • Primary Citation of Related Structures:  
    5FHY

  • PubMed Abstract: 

    • Flagella are crucial for bacterial motility and pathogenesis. The flagellar capping protein (FliD) regulates filament assembly by chaperoning and sorting flagellin (FliC) proteins after they traverse the hollow filament and exit the growing flagellum tip ...

    Flagella are crucial for bacterial motility and pathogenesis. The flagellar capping protein (FliD) regulates filament assembly by chaperoning and sorting flagellin (FliC) proteins after they traverse the hollow filament and exit the growing flagellum tip. In the absence of FliD, flagella are not formed, resulting in impaired motility and infectivity. Here, we report the 2.2 Å resolution X-ray crystal structure of FliD from Pseudomonas aeruginosa , the first high-resolution structure of any FliD protein from any bacterium. Using this evidence in combination with a multitude of biophysical and functional analyses, we find that Pseudomonas FliD exhibits unexpected structural similarity to other flagellar proteins at the domain level, adopts a unique hexameric oligomeric state, and depends on flexible determinants for oligomerization. Considering that the flagellin filaments on which FliD oligomers are affixed vary in protofilament number between bacteria, our results suggest that FliD oligomer stoichiometries vary across bacteria to complement their filament assemblies.

    Organizational Affiliation: 

    Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, United States.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
B-type flagellar hook-associated protein 2A, B346Pseudomonas aeruginosa PAO1Mutation(s): 0 
Gene Names: fliD, PA1094
UniProt
Find proteins for Q9K3C5 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Explore Q9K3C5 
Go to UniProtKB:  Q9K3C5
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA
Download Ideal Coordinates CCD File 
C [auth A], D [auth B], E [auth B]SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.249 
  • R-Value Observed: 0.251 
  • Space Group: P 6
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 124.741α = 90
b = 124.741β = 90
c = 107.01γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-10-05
    Type: Initial release