4KSR

Crystal Structure of the Vibrio cholerae ATPase GspE Hexamer


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.20 Å
  • R-Value Free: 0.376 
  • R-Value Work: 0.384 
  • R-Value Observed: 0.384 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Hexamers of the Type II Secretion ATPase GspE from Vibrio cholerae with Increased ATPase Activity.

Lu, C.Turley, S.Marionni, S.T.Park, Y.J.Lee, K.K.Patrick, M.Shah, R.Sandkvist, M.Bush, M.F.Hol, W.G.

(2013) Structure 21: 1707-1717

  • DOI: 10.1016/j.str.2013.06.027
  • Primary Citation of Related Structures:  
    4KSR, 4KSS

  • PubMed Abstract: 
  • The type II secretion system (T2SS), a multiprotein machinery spanning two membranes in Gram-negative bacteria, is responsible for the secretion of folded proteins from the periplasm across the outer membrane. The critical multidomain T2SS assembly A ...

    The type II secretion system (T2SS), a multiprotein machinery spanning two membranes in Gram-negative bacteria, is responsible for the secretion of folded proteins from the periplasm across the outer membrane. The critical multidomain T2SS assembly ATPase GspE(EpsE) had not been structurally characterized as a hexamer. Here, four hexamers of Vibrio cholerae GspE(EpsE) are obtained when fused to Hcp1 as an assistant hexamer, as shown with native mass spectrometry. The enzymatic activity of the GspE(EpsE)-Hcp1 fusions is ∼20 times higher than that of a GspE(EpsE) monomer, indicating that increasing the local concentration of GspE(EpsE) by the fusion strategy was successful. Crystal structures of GspE(EpsE)-Hcp1 fusions with different linker lengths reveal regular and elongated hexamers of GspE(EpsE) with major differences in domain orientation within subunits, and in subunit assembly. SAXS studies on GspE(EpsE)-Hcp1 fusions suggest that even further variability in GspE(EpsE) hexamer architecture is likely.


    Organizational Affiliation

    Department of Biochemistry, University of Washington, Seattle, WA 98195, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Type II secretion system protein E, Hemolysin-coregulated proteinA, B, C583Vibrio cholerae O1 biovar El Tor str. N16961Pseudomonas aeruginosa UCBPP-PA14
This entity is chimeric
Mutation(s): 0 
Gene Names: epsEVC_2732PA14_01030
Find proteins for A0A0H2ZJ24 (Pseudomonas aeruginosa (strain UCBPP-PA14))
Explore A0A0H2ZJ24 
Go to UniProtKB:  A0A0H2ZJ24
Find proteins for P37093 (Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961))
Explore P37093 
Go to UniProtKB:  P37093
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.20 Å
  • R-Value Free: 0.376 
  • R-Value Work: 0.384 
  • R-Value Observed: 0.384 
  • Space Group: P 2 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 112.467α = 90
b = 132.911β = 90
c = 142.75γ = 90
Software Package:
Software NamePurpose
XSCALEdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
XDSdata scaling
PHASESphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-09-04
    Type: Initial release
  • Version 1.1: 2013-10-09
    Changes: Database references
  • Version 1.2: 2017-08-23
    Changes: Refinement description, Source and taxonomy