4AUR

LeoA bacterial dynamin GTPase from ETEC

• PDB DOI: https://doi.org/10.2210/pdb4AUR/pdb

• Classification: HYDROLASE
• Organism(s): Escherichia coli ETEC H10407
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2012-05-21 Released: 2013-08-28 
• Deposition Author(s): Michie, K.A., Low, H.H., Lowe, J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.289 
• R-Value Work: 0.213 
• R-Value Observed: 0.216 

Literature

Leoa, B and C from Enterotoxigenic Escherichia Coli (Etec) are Bacterial Dynamins.

Michie, K.A., Boysen, A., Low, H.H., Moller-Jensen, J., Lowe, J.

(2014) PLoS One 9: 07211

• PubMed: 25203511 
• DOI: https://doi.org/10.1371/journal.pone.0107211
• Primary Citation of Related Structures:  
  4AUR


• PubMed Abstract: 
  

  Escherichia coli (ETEC) strain H10407 contains a GTPase virulence factor, LeoA, which is encoded on a pathogenicity island and has been shown to enhance toxin release, potentially through vesicle secretion. By sequence comparisons and X-ray structure determination we now identify LeoA as a bacterial dynamin-like protein (DLP). Proteins of the dynamin family remodel membranes and were once thought to be restricted to eukaryotes. In ETEC H10407 LeoA localises to the periplasm where it forms a punctate localisation pattern. Bioinformatic analyses of leoA and the two upstream genes leoB and leoC suggest that LeoA works in concert with a second dynamin-like protein, made up of LeoB and LeoC. Disruption of the leoAB genes leads to a reduction in secretion of periplasmic Tat-GFP and outer membrane OmpA. Our data suggest a role for LeoABC dynamin-like proteins in potentiating virulence through membrane vesicle associated toxin secretion.

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Organizational Affiliation: 

MRC Laboratory of Molecular Biology, Structural Studies Division, Cambridge, United Kingdom.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Macromolecule Content

• Total Structure Weight: 65.91 kDa 
• Atom Count: 4,509 
• Modelled Residue Count: 564 
• Deposited Residue Count: 577 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
LEOA	A	577	Escherichia coli ETEC H10407	Mutation(s): 0

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	B [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.289 
• R-Value Work: 0.213 
• R-Value Observed: 0.216 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 185.515	α = 90
b = 53.659	β = 96.65
c = 73.949	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
SOLVE	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2013-08-28 
Deposition Author(s): Michie, K.A., Low, H.H., Lowe, J.

Revision History  

• Version 1.0: 2013-08-28
  Type: Initial release
  
• Version 1.1: 2014-10-22
  Changes: Data collection, Database references