5O68

Crystal Structure of the Pseudomonas functional amyloid secretion protein FapF - R157A mutant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.08 Å
  • R-Value Free: 0.369 
  • R-Value Work: 0.319 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

A new class of hybrid secretion system is employed in Pseudomonas amyloid biogenesis.

Rouse, S.L.Hawthorne, W.J.Berry, J.L.Chorev, D.S.Ionescu, S.A.Lambert, S.Stylianou, F.Ewert, W.Mackie, U.Morgan, R.M.L.Otzen, D.Herbst, F.A.Nielsen, P.H.Dueholm, M.Bayley, H.Robinson, C.V.Hare, S.Matthews, S.

(2017) Nat Commun 8: 263-263

  • DOI: 10.1038/s41467-017-00361-6
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Gram-negative bacteria possess specialised biogenesis machineries that facilitate the export of amyloid subunits for construction of a biofilm matrix. The secretion of bacterial functional amyloid requires a bespoke outer-membrane protein channel thr ...

    Gram-negative bacteria possess specialised biogenesis machineries that facilitate the export of amyloid subunits for construction of a biofilm matrix. The secretion of bacterial functional amyloid requires a bespoke outer-membrane protein channel through which unfolded amyloid substrates are translocated. Here, we combine X-ray crystallography, native mass spectrometry, single-channel electrical recording, molecular simulations and circular dichroism measurements to provide high-resolution structural insight into the functional amyloid transporter from Pseudomonas, FapF. FapF forms a trimer of gated β-barrel channels in which opening is regulated by a helical plug connected to an extended coil-coiled platform spanning the bacterial periplasm. Although FapF represents a unique type of secretion system, it shares mechanistic features with a diverse range of peptide translocation systems. Our findings highlight alternative strategies for handling and export of amyloid protein sequences.Gram-negative bacteria assemble biofilms from amyloid fibres, which translocate across the outer membrane as unfolded amyloid precursors through a secretion system. Here, the authors characterise the structural details of the amyloid transporter FapF in Pseudomonas.


    Organizational Affiliation

    Department of Life Sciences, Imperial College London, South Kensington Campus, London, SW72AZ, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FapF
A, B, C, D, E, F, G, H, I, J, K, L
334Pseudomonas sp. UK4Mutation(s): 1 
Gene Names: fapF
Find proteins for C4IN73 (Pseudomonas sp. UK4)
Go to UniProtKB:  C4IN73
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
C8E
Query on C8E

Download SDF File 
Download CCD File 
A, C
(HYDROXYETHYLOXY)TRI(ETHYLOXY)OCTANE
C16 H34 O5
FEOZZFHAVXYAMB-UHFFFAOYSA-N
 Ligand Interaction
LDA
Query on LDA

Download SDF File 
Download CCD File 
A, B, C, I
LAURYL DIMETHYLAMINE-N-OXIDE
C14 H31 N O
SYELZBGXAIXKHU-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.08 Å
  • R-Value Free: 0.369 
  • R-Value Work: 0.319 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 80.587α = 87.09
b = 125.708β = 84.70
c = 142.667γ = 89.92
Software Package:
Software NamePurpose
SCALAdata scaling
MOLREPphasing
XDSdata reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom100280
Wellcome TrustUnited Kingdom104833

Revision History 

  • Version 1.0: 2017-08-23
    Type: Initial release