Biological Assembly 1  

Global Symmetry: Dihedral - D6  (3D View)
Global Stoichiometry: Homo 12-mer - A12 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

Global Symmetry: Dihedral - D6  (3D View)
Global Stoichiometry: Homo 12-mer - A12 

Biological assembly 2 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 71.82 kDa 
• Atom Count: 3,219 
• Modelled Residue Count: 458 
• Deposited Residue Count: 692 
• Unique protein chains: 1

 5FHY

Crystal structure of FliD (HAP2) from Pseudomonas aeruginosa PAO1

• PDB DOI: 10.2210/pdb5FHY/pdb

• Classification: STRUCTURAL PROTEIN
• Organism(s): Pseudomonas aeruginosa PAO1
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2015-12-22 Released: 2016-10-05 
• Deposition Author(s): Postel, S., Bonsor, D., Diederichs, K., Sundberg, E.J.

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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 

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

• PubMed: 27664419 
• 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. 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.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
B-type flagellar hook-associated protein 2	A, B	346	Pseudomonas aeruginosa PAO1	Mutation(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

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NA	C [auth A], D [auth B], E [auth B]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N

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 = 124.741	α = 90
b = 124.741	β = 90
c = 107.01	γ = 120

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2016-10-05 
Deposition Author(s): Postel, S., Bonsor, D., Diederichs, K., Sundberg, E.J.

Revision History  

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