5NPY

Crystal structure of Helicobacter pylori flagellar hook protein FlgE2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.292 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.188 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural characterization of FlgE2 protein from Helicobacter pylori hook.

Loconte, V.Kekez, I.Matkovic-Calogovic, D.Zanotti, G.

(2017) FEBS J. 284: 4328-4342

  • DOI: 10.1111/febs.14312

  • PubMed Abstract: 
  • The Helicobacter pylori flagellum is a complex rotatory nanomachine fundamental for the bacterium's survival in the human stomach. Protein FlgE is a component of the hook, a flexible junction exposed on the cell surface. In the H. pylori genome two d ...

    The Helicobacter pylori flagellum is a complex rotatory nanomachine fundamental for the bacterium's survival in the human stomach. Protein FlgE is a component of the hook, a flexible junction exposed on the cell surface. In the H. pylori genome two different genes are present in different positions coding for hypothetical FlgE. The first protein, FlgE1, is the actual component of the flagellum hook, whilst the second, FlgE2, shares only 26% of the sequence identity with the other and its physiological function is still undefined. We have cloned, purified and crystallized FlgE2, whose structure, determined by the single-wavelength anomalous diffraction method, shows that in overall organization, the protein is composed of three distinct domains, two of them relatively similar to those of FlgE from other Gram-negative bacteria, whilst the third is peculiar to H. pylori. The crystal structure, along with the detected interaction with the regulatory cap protein FlgD, suggests a complementary function of FlgE1 and FlgE2 in the H. pylori flagellum, possibly typical of polar flagella, confirming the role of both proteins in the flagellar hook organization. Although some general features are shared with other Gram-negative bacteria, the presence of two different hook proteins indicates that the molecular organization of H. pylori flagellum has its own peculiarities.


    Organizational Affiliation

    Department of Biomedical Sciences, University of Padua, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Flagellar basal body protein
A
618Helicobacter pylori (strain G27)Mutation(s): 0 
Gene Names: flgE-2
Find proteins for B5Z7R4 (Helicobacter pylori (strain G27))
Go to UniProtKB:  B5Z7R4
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
144
Query on 144

Download SDF File 
Download CCD File 
A
TRIS-HYDROXYMETHYL-METHYL-AMMONIUM
C4 H12 N O3
DRDCQJADRSJFFD-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.292 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.188 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 43.209α = 90.00
b = 49.592β = 90.00
c = 238.261γ = 90.00
Software Package:
Software NamePurpose
autoSHARPphasing
PHENIXrefinement
Aimlessdata scaling
iMOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-11-15
    Type: Initial release
  • Version 1.1: 2017-12-27
    Type: Database references