4DVZ

Crystal structure of the Helicobacter pylori CagA oncoprotein


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.19 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.225 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Tertiary structure-function analysis reveals the pathogenic signaling potentiation mechanism of Helicobacter pylori oncogenic effector CagA

Hayashi, T.Senda, M.Morohashi, H.Higashi, H.Horio, M.Kashiba, Y.Nagase, L.Sasaya, D.Shimizu, T.Venugopalan, N.Kumeta, H.Noda, N.N.Inagaki, F.Senda, T.Hatakeyama, M.

(2012) Cell Host Microbe 12: 20-33

  • DOI: 10.1016/j.chom.2012.05.010
  • Primary Citation of Related Structures:  
    4DVY, 4DVZ

  • PubMed Abstract: 
  • The Helicobacter pylori type IV secretion effector CagA is a major bacterial virulence determinant and critical for gastric carcinogenesis. Upon delivery into gastric epithelial cells, CagA localizes to the inner face of the plasma membrane, where it ...

    The Helicobacter pylori type IV secretion effector CagA is a major bacterial virulence determinant and critical for gastric carcinogenesis. Upon delivery into gastric epithelial cells, CagA localizes to the inner face of the plasma membrane, where it acts as a pathogenic scaffold/hub that promiscuously recruits host proteins to potentiate oncogenic signaling. We find that CagA comprises a structured N-terminal region and an intrinsically disordered C-terminal region that directs versatile protein interactions. X-ray crystallographic analysis of the N-terminal CagA fragment (residues 1-876) revealed that the region has a structure comprised of three discrete domains. Domain I constitutes a mobile CagA N terminus, while Domain II tethers CagA to the plasma membrane by interacting with membrane phosphatidylserine. Domain III interacts intramolecularly with the intrinsically disordered C-terminal region, and this interaction potentiates the pathogenic scaffold/hub function of CagA. The present work provides a tertiary-structural basis for the pathophysiological/oncogenic action of H. pylori CagA.


    Organizational Affiliation

    Division of Microbiology, Graduate School of Medicine, University of Tokyo, Japan.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cytotoxicity-associated immunodominant antigenA569Helicobacter pylori 26695Mutation(s): 0 
Gene Names: cagAcag26caiHP_0547
Find proteins for P55980 (Helicobacter pylori (strain ATCC 700392 / 26695))
Explore P55980 
Go to UniProtKB:  P55980
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.19 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.225 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 95.671α = 90
b = 95.671β = 90
c = 167.924γ = 120
Software Package:
Software NamePurpose
ADSCdata collection
SHARPphasing
BUSTERrefinement
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-07-25
    Type: Initial release
  • Version 1.1: 2013-09-04
    Changes: Database references