3OSS

The crystal structure of enterotoxigenic Escherichia coli GspC-GspD complex from the type II secretion system


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.63 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.215 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Structural and functional studies on the interaction of GspC and GspD in the type II secretion system.

Korotkov, K.V.Johnson, T.L.Jobling, M.G.Pruneda, J.Pardon, E.Heroux, A.Turley, S.Steyaert, J.Holmes, R.K.Sandkvist, M.Hol, W.G.

(2011) PLoS Pathog 7: e1002228-e1002228

  • DOI: 10.1371/journal.ppat.1002228
  • Primary Citation of Related Structures:  
    3OSS

  • PubMed Abstract: 
  • Type II secretion systems (T2SSs) are critical for secretion of many proteins from Gram-negative bacteria. In the T2SS, the outer membrane secretin GspD forms a multimeric pore for translocation of secreted proteins. GspD and the inner membrane protein GspC interact with each other via periplasmic domains ...

    Type II secretion systems (T2SSs) are critical for secretion of many proteins from Gram-negative bacteria. In the T2SS, the outer membrane secretin GspD forms a multimeric pore for translocation of secreted proteins. GspD and the inner membrane protein GspC interact with each other via periplasmic domains. Three different crystal structures of the homology region domain of GspC (GspC(HR)) in complex with either two or three domains of the N-terminal region of GspD from enterotoxigenic Escherichia coli show that GspC(HR) adopts an all-β topology. N-terminal β-strands of GspC and the N0 domain of GspD are major components of the interface between these inner and outer membrane proteins from the T2SS. The biological relevance of the observed GspC-GspD interface is shown by analysis of variant proteins in two-hybrid studies and by the effect of mutations in homologous genes on extracellular secretion and subcellular distribution of GspC in Vibrio cholerae. Substitutions of interface residues of GspD have a dramatic effect on the focal distribution of GspC in V. cholerae. These studies indicate that the GspC(HR)-GspD(N0) interactions observed in the crystal structure are essential for T2SS function. Possible implications of our structures for the stoichiometry of the T2SS and exoprotein secretion are discussed.


    Organizational Affiliation

    Department of Biochemistry, Biomolecular Structure Center, University of Washington, Seattle, Washington, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TYPE 2 SECRETION SYSTEM, GSPCA [auth C]68Escherichia coli ETEC H10407Mutation(s): 0 
Gene Names: GSPCgspC2ETEC_3238
Find proteins for E3PJ87 (Escherichia coli O78:H11 (strain H10407 / ETEC))
Explore E3PJ87 
Go to UniProtKB:  E3PJ87
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
TYPE 2 SECRETION SYSTEM, SECRETIN GSPDB [auth D]181Escherichia coli ETEC H10407Mutation(s): 0 
Gene Names: GSPD
Find proteins for E3PJ86 (Escherichia coli O78:H11 (strain H10407 / ETEC))
Explore E3PJ86 
Go to UniProtKB:  E3PJ86
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download Ideal Coordinates CCD File 
C [auth D]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download Ideal Coordinates CCD File 
DCHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.63 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.215 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.5α = 90
b = 76.81β = 90
c = 85.77γ = 90
Software Package:
Software NamePurpose
XSCALEdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
Blu-Icedata collection
XDSdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-08-03
    Type: Initial release
  • Version 1.1: 2011-08-10
    Changes: Database references, Structure summary
  • Version 1.2: 2011-11-02
    Changes: Database references, Structure summary
  • Version 1.3: 2017-08-23
    Changes: Refinement description, Source and taxonomy
  • Version 1.4: 2017-11-08
    Changes: Refinement description