3RGU

Structure of Fap-NRa at pH 5.0

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.224 

wwPDB Validation 3D Report Full Report


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


Literature

Structural insight into the role of Streptococcus parasanguinis Fap1 within oral biofilm formation.

Garnett, J.A., Simpson, P.J., Taylor, J., Benjamin, S.V., Tagliaferri, C., Cota, E., Chen, Y.Y., Wu, H., Matthews, S.

(2012) Biochem Biophys Res Commun 417: 421-426

  • DOI: 10.1016/j.bbrc.2011.11.131
  • Structures With Same Primary Citation

  • PubMed Abstract: 

    • The fimbriae-associated protein 1 (Fap1) is a major adhesin of Streptococcus parasanguinis, a primary colonizer of the oral cavity that plays an important role in the formation of dental plaque. Fap1 is an extracellular adhesive surface fibre belongi ...

    The fimbriae-associated protein 1 (Fap1) is a major adhesin of Streptococcus parasanguinis, a primary colonizer of the oral cavity that plays an important role in the formation of dental plaque. Fap1 is an extracellular adhesive surface fibre belonging to the serine-rich repeat protein (SRRP) family, which plays a central role in the pathogenesis of streptococci and staphylococci. The N-terminal adhesive region of Fap1 (Fap1-NR) is composed of two domains (Fap1-NR(α) and Fap1-NR(β)) and is projected away from the bacterial surface via the extensive serine-rich repeat region, for adhesion to the salivary pellicle. The adhesive properties of Fap1 are modulated through a pH switch in which a reduction in pH results in a rearrangement between the Fap1-NR(α) and Fap1-NR(β) domains, which assists in the survival of S. parasanguinis in acidic environments. We have solved the structure of Fap1-NR(α) at pH 5.0 at 3.0Ǻ resolution and reveal how subtle rearrangements of the 3-helix bundle combined with a change in electrostatic potential mediates 'opening' and activation of the adhesive region. Further, we show that pH-dependent changes are critical for biofilm formation and present an atomic model for the inter-Fap1-NR interactions which have been assigned an important role in the biofilm formation.

    Organizational Affiliation: 

    Department of Biological Sciences, Centre for Structural Biology, Imperial College London, London, UK.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Fimbriae-associated protein Fap1
A, B, C, D
132Streptococcus parasanguinisMutation(s): 0 
Gene Names: fap1
Find proteins for A1C3L3 (Streptococcus parasanguinis)
Go to UniProtKB:  A1C3L3
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GLC
Query on GLC
Download CCD File 
C
ALPHA-D-GLUCOSE
C6 H12 O6
WQZGKKKJIJFFOK-DVKNGEFBSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.224 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 121.885α = 90
b = 121.885β = 90
c = 117.98γ = 90
Software Package:
Software NamePurpose
PHASERphasing
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-12-28
    Type: Initial release
  • Version 1.1: 2012-02-01
    Changes: Database references