3SOK

Dichelobacter nodosus pilin FimA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.239 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Ultrahigh Resolution and Full-length Pilin Structures with Insights for Filament Assembly, Pathogenic Functions, and Vaccine Potential.

Hartung, S.Arvai, A.S.Wood, T.Kolappan, S.Shin, D.S.Craig, L.Tainer, J.A.

(2011) J Biol Chem 286: 44254-44265

  • DOI: 10.1074/jbc.M111.297242
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Pilin proteins assemble into Type IV pili (T4P), surface-displayed bacterial filaments with virulence functions including motility, attachment, transformation, immune escape, and colony formation. However, challenges in crystallizing full-length fibe ...

    Pilin proteins assemble into Type IV pili (T4P), surface-displayed bacterial filaments with virulence functions including motility, attachment, transformation, immune escape, and colony formation. However, challenges in crystallizing full-length fiber-forming and membrane protein pilins leave unanswered questions regarding pilin structures, assembly, functions, and vaccine potential. Here we report pilin structures of full-length DnFimA from the sheep pathogen Dichelobacter nodosus and FtPilE from the human pathogen Francisella tularensis at 2.3 and 1 Å resolution, respectively. The DnFimA structure reveals an extended kinked N-terminal α-helix, an unusual centrally located disulfide, conserved subdomains, and assembled epitopes informing serogroup vaccines. An interaction between the conserved Glu-5 carboxyl oxygen and the N-terminal amine of an adjacent subunit in the crystallographic dimer is consistent with the hypothesis of a salt bridge between these groups driving T4P assembly. The FtPilE structure identifies an authentic Type IV pilin and provides a framework for understanding the role of T4P in F. tularensis virulence. Combined results define a unified pilin architecture, specialized subdomain roles in pilus assembly and function, and potential therapeutic targets.


    Organizational Affiliation

    Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Fimbrial proteinA, B151Dichelobacter nodosusMutation(s): 0 
Gene Names: fimA
Find proteins for P02975 (Dichelobacter nodosus)
Explore P02975 
Go to UniProtKB:  P02975
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.239 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 105.729α = 90
b = 105.729β = 90
c = 73.848γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-11-02
    Type: Initial release
  • Version 1.1: 2012-01-04
    Changes: Database references