6FL0

Crystal structure of the membrane attack complex assembly inhibitor BGA71 from Lyme disease agent Borreliella bavariensis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.195 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Crystal structure of the membrane attack complex assembly inhibitor BGA71 from the Lyme disease agent Borrelia bavariensis.

Brangulis, K.Akopjana, I.Petrovskis, I.Kazaks, A.Kraiczy, P.Tars, K.

(2018) Sci Rep 8: 11286-11286

  • DOI: https://doi.org/10.1038/s41598-018-29651-9
  • Primary Citation of Related Structures:  
    6FL0, 6FMH

  • PubMed Abstract: 

    Borrelia (B.) bavariensis, B. burgdorferi, B. afzelii, B. garinii, B. spielmanii, and B. mayonii are the causative agents in Lyme disease. Lyme disease spirochetes reside in infected Ixodes ticks and are transferred to mammalian hosts during tick feeding. Once transmitted, spirochetes must overcome the first line of defense of the innate immune system either by binding complement regulators or by terminating the formation of the membrane attack complex (MAC). In B. bavariensis, the proteins BGA66 and BGA71 inhibit complement activation by interacting with the late complement components C7, C8, and C9, as well as with the formed MAC. In this study, we have determined the crystal structure of the potent MAC inhibitor BGA71 at 2.9 Ǻ resolution. The structure revealed a cysteine cross-linked homodimer. Based on the crystal structure of BGA71 and the structure-based sequence alignment with CspA from B. burgdorferi, we have proposed a potential binding site for C7 and C9, both of which are constituents of the formed MAC. Our results shed light on the molecular mechanism of immune evasion developed by the human pathogenic Borrelia species to overcome innate immunity. These results will aid in the understanding of Lyme disease pathogenesis and pave the way for the development of new strategies to prevent Lyme disease.


  • Organizational Affiliation

    Latvian Biomedical Research and Study Centre, Ratsupites 1 k-1, LV-1067, Riga, Latvia. kalvis@biomed.lu.lv.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
membrane attack complex assembly inhibitor BGA71
A, B, C, D, E
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R
194Borreliella bavariensisMutation(s): 0 
Gene Names: BGA71
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.195 
  • Space Group: P 31
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 239.176α = 90
b = 239.176β = 90
c = 56.253γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
Aimlessdata scaling
SHELXphasing
PDB_EXTRACTdata extraction
XDSdata reduction

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Latvia1.1.1.2/VIAA/1/16/144

Revision History  (Full details and data files)

  • Version 1.0: 2018-08-08
    Type: Initial release
  • Version 1.1: 2024-11-13
    Changes: Data collection, Database references, Derived calculations, Structure summary