6GV9

Structure of the type IV pilus from enterohemorrhagic Escherichia coli (EHEC)


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 8 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structure and Assembly of the Enterohemorrhagic Escherichia coli Type 4 Pilus.

Bardiaux, B.de Amorim, G.C.Luna Rico, A.Zheng, W.Guilvout, I.Jollivet, C.Nilges, M.Egelman, E.H.Izadi-Pruneyre, N.Francetic, O.

(2019) Structure --: --

  • DOI: 10.1016/j.str.2019.03.021
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Bacterial type 4a pili are dynamic surface filaments that promote bacterial adherence, motility, and macromolecular transport. Their genes are highly conserved among enterobacteria and their expression in enterohemorrhagic Escherichia coli (EHEC) pro ...

    Bacterial type 4a pili are dynamic surface filaments that promote bacterial adherence, motility, and macromolecular transport. Their genes are highly conserved among enterobacteria and their expression in enterohemorrhagic Escherichia coli (EHEC) promotes adhesion to intestinal epithelia and pro-inflammatory signaling. To define the molecular basis of EHEC pilus assembly, we determined the structure of the periplasmic domain of its major subunit PpdD (PpdDp), a prototype of an enterobacterial pilin subfamily containing two disulfide bonds. The structure of PpdDp, determined by NMR, was then docked into the density envelope of purified EHEC pili obtained by cryoelectron microscopy (cryo-EM). Cryo-EM reconstruction of EHEC pili at ∼8 Å resolution revealed extremely high pilus flexibility correlating with a large extended region of the pilin stem. Systematic mutagenesis combined with functional and interaction analyses identified charged residues essential for pilus assembly. Structural information on exposed regions and interfaces between EHEC pilins is relevant for vaccine and drug discovery.


    Organizational Affiliation

    Structural Bioinformatics Unit, Department of Structural Biology and Chemistry, C3BI, Institut Pasteur, CNRS UMR3528, CNRS USR3756, Paris, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Prepilin peptidase-dependent protein D
A, B, C, D, E, F, G, H, I, J, K, L, M, N
140Escherichia coli O157:H7Mutation(s): 0 
Gene Names: ppdD
Find proteins for Q8X974 (Escherichia coli O157:H7)
Go to UniProtKB:  Q8X974
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 8 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
French National Research AgencyFrance--

Revision History 

  • Version 1.0: 2019-05-15
    Type: Initial release