4ACK

3D Structure of DotU from Francisella novicida

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.197 

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This is version 1.1 of the entry. See complete history. 


Literature

The Structure of the Conserved Type Six Secretion Protein Tssl (Dotu) from Francisella Novicida

Robb, C.S., Nano, F.E., Boraston, A.B.

(2012) J Mol Biol 419: 277

  • DOI: 10.1016/j.jmb.2012.04.003
  • Primary Citation of Related Structures:  
    4ACK, 4ACL

  • PubMed Abstract: 

    • Type six secretion systems (T6SSs) are found in many Gram-negative bacteria and are important for their virulence or their ecological competitiveness. The multicomponent T6SSs are responsible for the translocation of effector molecules into target eukaryotic or prokaryotic cells ...

    Type six secretion systems (T6SSs) are found in many Gram-negative bacteria and are important for their virulence or their ecological competitiveness. The multicomponent T6SSs are responsible for the translocation of effector molecules into target eukaryotic or prokaryotic cells. The Francisella pathogenicity island encodes a putative T6SS that Francisella novicida requires for intramacrophage growth and virulence during infection of rodents. Here, we present the X-ray crystal structure of the conserved type six secretion component TssL (DotU) from F. novicida. The structure of this protein, which is referred to as Ftn_TssL, revealed an all-α-helical fold that is a unique fusion of two 3-helix bundles. The sequence of Ftn_TssL shows low identity to presumed homologs that are found in most T6SSs. The structure of Ftn_TssL, however, has allowed us to provide bioinformatics evidence that the F. novicida TssL has a fold that is very likely representative for TssL forms from both T6SSs and from the distantly related B subclass of type four secretion systems. A map of sequence conservation on the TssL structure revealed a surface-exposed groove that may represent a functional site on the protein.

    Organizational Affiliation: 

    Department of Biochemistry and Microbiology, University of Victoria, PO Box 3055 Station CSC, Victoria, British Columbia, Canada V8W 3P6.



Macromolecules
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TSSLA, B185Francisella tularensis subsp. novicida U112Mutation(s): 0 
Gene Names: FTN_1316, AW25_688
UniProt
Find proteins for A0Q7H7 (Francisella tularensis subsp. novicida (strain U112))
Explore A0Q7H7 
Go to UniProtKB:  A0Q7H7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0Q7H7
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.197 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 39.66α = 90
b = 85.84β = 102.93
c = 67.71γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALEPACKdata scaling
autoSHARPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-04-25
    Type: Initial release
  • Version 1.1: 2012-06-06
    Changes: Other