6JZJ

Structure of FimA type-2 (FimA2) prepilin of the type V major fimbrium


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.178 
  • R-Value Observed: 0.179 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure of polymerized type V pilin reveals assembly mechanism involving protease-mediated strand exchange.

Shibata, S.Shoji, M.Okada, K.Matsunami, H.Matthews, M.M.Imada, K.Nakayama, K.Wolf, M.

(2020) Nat Microbiol 5: 830-837

  • DOI: 10.1038/s41564-020-0705-1
  • Primary Citation of Related Structures:  
    6JZJ, 6JZK, 6KMF

  • PubMed Abstract: 
  • Bacterial adhesion is a general strategy for host-microbe and microbe-microbe interactions. Adhesive pili are essential for colonization, biofilm formation, virulence and pathogenesis of many environmental and pathogenic bacteria 1,2 . Members of the class Bacteroidia have unique type V pili, assembled by protease-mediated polymerization 3 ...

    Bacterial adhesion is a general strategy for host-microbe and microbe-microbe interactions. Adhesive pili are essential for colonization, biofilm formation, virulence and pathogenesis of many environmental and pathogenic bacteria 1,2 . Members of the class Bacteroidia have unique type V pili, assembled by protease-mediated polymerization 3 . Porphyromonas gingivalis is the main contributor to periodontal disease and its type V pili are a key factor for its virulence 4 . However, the structure of the polymerized pilus and its assembly mechanism are unknown. Here we show structures of polymerized and monomeric states of FimA stalk pilin from P. gingivalis, determined by cryo-electron microscopy and crystallography. The atomic model of assembled FimA shows that the C-terminal strand of a donor subunit is inserted into a groove in the β-sheet of an acceptor subunit after N-terminal cleavage by the protease RgpB. The C terminus of the donor strand is essential for polymerization. We propose that type V pili assemble via a sequential polar assembly mechanism at the cell surface, involving protease-mediated strand exchange, employed by various Gram-negative species belonging to the class Bacteroidia. Our results reveal functional surfaces related to pathogenic properties of polymerized FimA. These insights may facilitate development of antibacterial drugs.


    Organizational Affiliation

    Molecular Cryo-Electron Microscopy Unit, Okinawa Institute of Science and Technology Graduate University, Onna-son, Japan. matthias.wolf@oist.jp.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Major fimbrium subunit FimA type-2A373Porphyromonas gingivalis TDC60Mutation(s): 0 
Gene Names: fimA (type II)
UniProt
Find proteins for Q4W6Y8 (Porphyromonas gingivalis)
Explore Q4W6Y8 
Go to UniProtKB:  Q4W6Y8
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download Ideal Coordinates CCD File 
B [auth A], C [auth A]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.178 
  • R-Value Observed: 0.179 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.03α = 90
b = 85.95β = 90
c = 102.09γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
MOSFLMdata reduction
Aimlessdata scaling
PHENIXphasing

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Japan Society for the Promotion of ScienceJapan16H05504

Revision History  (Full details and data files)

  • Version 1.0: 2020-04-15
    Type: Initial release
  • Version 1.1: 2020-04-29
    Changes: Database references
  • Version 1.2: 2020-06-17
    Changes: Database references