5EVF | pdb_00005evf

Crystal structure of a Francisella virulence factor FvfA in the hexagonal form

• PDB DOI: https://doi.org/10.2210/pdb5EVF/pdb

• Classification: UNKNOWN FUNCTION
• Organism(s): Francisella tularensis subsp. novicida
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2015-11-19 Released: 2016-10-26 
• Deposition Author(s): Kolappan, S., Lo, K.Y., Shen, C.L.J., Guttman, J.A., Craig, L.
• Funding Organization(s): Natural Sciences and Engineering Research Council (NSERC, Canada), Canadian Institutes of Health Research (CIHR), Simon Fraser University Funds

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.76 Å
• R-Value Free: 
  0.197 (Depositor), 0.198 (DCC) 
• R-Value Work: 
  0.167 (Depositor), 0.168 (DCC) 
• R-Value Observed: 
  0.169 (Depositor) 

Literature

Structure of the conserved Francisella virulence protein FvfA.

Kolappan, S., Lo, K.Y., Shen, C.L.J., Guttman, J.A., Craig, L.

(2017) Acta Crystallogr D Struct Biol 73: 814-821

• PubMed: 28994410 
• DOI: https://doi.org/10.1107/S205979831701333X
• Primary Citation Related Structures: 
  5EVF, 5EVG


• PubMed Abstract: 
  

  Francisella tularensis is a potent human pathogen that invades and survives in macrophage and epithelial cells. Two identical proteins, FTT_0924 from F. tularensis subsp. tularensis and FTL_1286 from F. tularensis subsp. holarctica LVS, have previously been identified as playing a role in protection of the bacteria from osmotic shock and its survival in macrophages. FTT_0924 has been shown to localize to the inner membrane, with its C-terminus exposed to the periplasm. Here, crystal structures of the F. novicida homologue FTN_0802, which we call FvfA, in two crystal forms are reported at 1.8 Å resolution. FvfA differs from FTT_0924 and FTL_1286 by a single amino acid. FvfA has a DUF1471 fold that closely resembles the Escherichia coli outer membrane lipoprotein RscF, a component of a phosphorelay pathway involved in protecting bacteria from outer membrane perturbation. The structural and functional similarities and differences between these proteins and their implications for F. tularensis pathogenesis are discussed.

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Organizational Affiliation: 
• Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, BC V5A 1S6, Canada.
Department of Biological Sciences, Centre for Cell Biology, Development, and Disease, Simon Fraser University, Burnaby, BC V5A 1S6, Canada.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 12.08 kDa 
• Atom Count: 963 
• Modeled Residue Count: 105 
• Deposited Residue Count: 105 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Francisella virulence factor	A	105	Francisella tularensis subsp. novicida	Mutation(s): 0  Gene Names: ACX55_1794
UniProt
Find proteins for A0Q625 (Francisella tularensis subsp. novicida (strain ATCC 15482 / CCUG 33449 / U112)) Explore A0Q625  Go to UniProtKB:  A0Q625

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GOL	B [auth A]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N
CL	C [auth A]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

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: 1.76 Å
• R-Value Free:  0.197 (Depositor), 0.198 (DCC) 
• R-Value Work:  0.167 (Depositor), 0.168 (DCC) 
• R-Value Observed: 0.169 (Depositor) 

Space Group: P 6₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 60.43	α = 90
b = 60.43	β = 90
c = 58.571	γ = 120

Software Package:

Software Name	Purpose
PHENIX	refinement
MOSFLM	data reduction
Aimless	data scaling
SOLVE	phasing

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2016-10-26 
Deposition Author(s): Kolappan, S., Lo, K.Y., Shen, C.L.J., Guttman, J.A., Craig, L.

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Funding Organization	Location	Grant Number
Natural Sciences and Engineering Research Council (NSERC, Canada)	Canada	--
Canadian Institutes of Health Research (CIHR)	Canada	--
Simon Fraser University Funds	Canada	--

Revision History  

• Version 1.0: 2016-10-26
  Type: Initial release
  
• Version 1.1: 2017-09-06
  Changes: Author supporting evidence, Derived calculations
• Version 1.2: 2017-10-18
  Changes: Database references
• Version 1.3: 2017-12-20
  Changes: Database references
• Version 1.4: 2020-01-08
  Changes: Author supporting evidence
• Version 1.5: 2024-11-20
  Changes: Data collection, Database references, Structure summary