6XFJ

Crystal structure of the type III secretion pilotin InvH


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.20 Å
  • R-Value Free: 0.168 
  • R-Value Work: 0.132 
  • R-Value Observed: 0.134 

wwPDB Validation 3D Report Full Report



Literature

Characterization of the Pilotin-Secretin Complex from the Salmonella enterica Type III Secretion System Using Hybrid Structural Methods.

Majewski, D.D.Okon, M.Heinkel, F.Robb, C.S.Vuckovic, M.McIntosh, L.P.Strynadka, N.C.J.

(2020) Structure 

  • DOI: 10.1016/j.str.2020.08.006
  • Primary Citation of Related Structures:  
    6XFL, 6XFK, 6XFJ

  • PubMed Abstract: 
  • The type III secretion system (T3SS) is a multi-membrane-spanning protein channel used by Gram-negative pathogenic bacteria to secrete effectors directly into the host cell cytoplasm. In the many species reliant on the T3SS for pathogenicity, proper ...

    The type III secretion system (T3SS) is a multi-membrane-spanning protein channel used by Gram-negative pathogenic bacteria to secrete effectors directly into the host cell cytoplasm. In the many species reliant on the T3SS for pathogenicity, proper assembly of the outer membrane secretin pore depends on a diverse family of lipoproteins called pilotins. We present structural and biochemical data on the Salmonella enterica pilotin InvH and the S domain of its cognate secretin InvG. Characterization of InvH by X-ray crystallography revealed a dimerized, α-helical pilotin. Size-exclusion-coupled multi-angle light scattering and small-angle X-ray scattering provide supporting evidence for the formation of an InvH homodimer in solution. Structures of the InvH-InvG heterodimeric complex determined by X-ray crystallography and NMR spectroscopy indicate a predominantly hydrophobic interface. Knowledge of the interaction between InvH and InvG brings us closer to understanding the mechanisms by which pilotins assemble the secretin pore.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology and the Center for Blood Research, University of British Columbia, Vancouver, BC, Canada. Electronic address: ncjs@mail.ubc.ca.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Type 3 secretion system pilotinA, B, C, D82Salmonella enterica subsp. enterica serovar Typhimurium str. LT2Mutation(s): 0 
Gene Names: invHsctGSTM2900
Find proteins for P0CL43 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Explore P0CL43 
Go to UniProtKB:  P0CL43
Protein Feature View
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CD
Query on CD

Download CCD File 
A, B, C, D
CADMIUM ION
Cd
WLZRMCYVCSSEQC-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download CCD File 
A, B, C, D
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
NA
Query on NA

Download CCD File 
B
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.20 Å
  • R-Value Free: 0.168 
  • R-Value Work: 0.132 
  • R-Value Observed: 0.134 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 25.503α = 107.69
b = 53.183β = 97.2
c = 56.851γ = 95.95
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
Aimlessdata scaling
AutoSolphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Canadian Institutes of Health Research (CIHR)Canada--
Natural Sciences and Engineering Research Council (NSERC, Canada)Canada--

Revision History 

  • Version 1.0: 2020-09-16
    Type: Initial release