2GA0

Variable Small Protein 1 of Borrelia turicatae (VspA or Vsp1)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.219 

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This is version 1.3 of the entry. See complete history. 


Literature

Crystal structure of neurotropism-associated variable surface protein 1 (Vsp1) of Borrelia turicatae.

Lawson, C.L., Yung, B.H., Barbour, A.G., Zuckert, W.R.

(2006) J Bacteriol 188: 4522-4530

  • DOI: 10.1128/JB.00028-06
  • Primary Citation of Related Structures:  
    1YJG, 2GA0

  • PubMed Abstract: 

    • Vsp surface lipoproteins are serotype-defining antigens of relapsing fever spirochetes that undergo multiphasic antigenic variation to allow bacterial persistence in spite of an immune response. Two isogenic serotypes of Borrelia turicatae strain Oz1 differ in their Vsp sequences and in disease manifestations in infected mice: Vsp1 is associated with the selection of a neurological niche, while Vsp2 is associated with blood and skin infection ...

    Vsp surface lipoproteins are serotype-defining antigens of relapsing fever spirochetes that undergo multiphasic antigenic variation to allow bacterial persistence in spite of an immune response. Two isogenic serotypes of Borrelia turicatae strain Oz1 differ in their Vsp sequences and in disease manifestations in infected mice: Vsp1 is associated with the selection of a neurological niche, while Vsp2 is associated with blood and skin infection. We report here crystal structures of the Vsp1 dimer at 2.7 and 2.2 A. The structures confirm that relapsing fever Vsp proteins share a common helical fold with OspCs of Lyme disease-causing Borrelia. The fold features an inner stem formed by highly conserved N and C termini and an outer "dome" formed by the variable central residues. Both Vsp1 and OspC structures possess small water-filled cavities, or pockets, that are lined largely by variable residues and are thus highly variable in shape. These features appear to signify tolerance of the Vsp-OspC fold for imperfect packing of residues at its antigenic surface. Structural comparison of Vsp1 with a homology model for Vsp2 suggests that observed differences in disease manifestation may arise in part from distinct differences in electrostatic surface properties; additional predicted positively charged surface patches on Vsp2 compared to Vsp1 may be sufficient to explain the relative propensity of Vsp2 to bind to acidic glycosaminoglycans.

    Related Citations: 
    • Structural Conservation of Neurotropism-associated VspA within the Variable Vsp-OspC Lipoprotein Family
      Zueckert, W.R., Kerentseva, T.A., Lawson, C.L., Barbour, A.G.
      (2001) J Biol Chem 276: 457
    Organizational Affiliation: 

    Department of Chemistry and Chemical Biology, 610 Taylor Road, Piscataway, NJ 08854, USA. cathy.lawson@rutgers.edu



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
surface protein VspA
A, B, C, D, E, F, G, H
A, B, C, D, E, F, G, H
181Borrelia turicataeMutation(s): 0 
Gene Names: Vsp1, vspA
UniProt
Find proteins for O34000 (Borrelia turicatae)
Explore O34000 
Go to UniProtKB:  O34000
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO34000
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.219 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 241.835α = 90
b = 69.105β = 104.95
c = 87.578γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report



View more in-depth experimental data
Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-06-27
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.3: 2017-10-18
    Changes: Refinement description