6GBH

Helicobacter pylori adhesin HopQ type II bound to the N-terminal domain of human CEACAM1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.59 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.218 
  • R-Value Observed: 0.221 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Helicobacter pyloriadhesin HopQ disruptstransdimerization in human CEACAMs.

Moonens, K.Hamway, Y.Neddermann, M.Reschke, M.Tegtmeyer, N.Kruse, T.Kammerer, R.Mejias-Luque, R.Singer, B.B.Backert, S.Gerhard, M.Remaut, H.

(2018) EMBO J 37

  • DOI: 10.15252/embj.201798665
  • Primary Citation of Related Structures:  
    6GBH, 6GBG

  • PubMed Abstract: 
  • The human gastric pathogen Helicobacter pylori is a major causative agent of gastritis, peptic ulcer disease, and gastric cancer. As part of its adhesive lifestyle, the bacterium targets members of the carcinoembryonic antigen-related cell adhes ...

    The human gastric pathogen Helicobacter pylori is a major causative agent of gastritis, peptic ulcer disease, and gastric cancer. As part of its adhesive lifestyle, the bacterium targets members of the carcinoembryonic antigen-related cell adhesion molecule (CEACAM) family by the conserved outer membrane adhesin HopQ. The HopQ-CEACAM1 interaction is associated with inflammatory responses and enables the intracellular delivery and phosphorylation of the CagA oncoprotein via a yet unknown mechanism. Here, we generated crystal structures of HopQ isotypes I and II bound to the N-terminal domain of human CEACAM1 (C1ND) and elucidated the structural basis of H. pylori specificity toward human CEACAM receptors. Both HopQ alleles target the β-strands G, F, and C of C1ND, which form the trans dimerization interface in homo- and heterophilic CEACAM interactions. Using SAXS, we show that the HopQ ectodomain is sufficient to induce C1ND monomerization and thus providing H. pylori a route to influence CEACAM-mediated cell adherence and signaling events.


    Organizational Affiliation

    Structural Biology Brussels, Vrije Universiteit Brussel, Brussels, Belgium.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Carcinoembryonic antigen-related cell adhesion molecule 1 BD115Homo sapiensMutation(s): 0 
Gene Names: CEACAM1BGPBGP1
Find proteins for P13688 (Homo sapiens)
Explore P13688 
Go to UniProtKB:  P13688
NIH Common Fund Data Resources
PHAROS:  P13688
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
HopQ AC425Helicobacter pyloriMutation(s): 0 
Gene Names: hopQCV727_02775
Find proteins for Q8GDI6 (Helicobacter pylori)
Explore Q8GDI6 
Go to UniProtKB:  Q8GDI6
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.59 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.218 
  • R-Value Observed: 0.221 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 79.82α = 90
b = 169.67β = 90
c = 198.096γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-06-27
    Type: Initial release
  • Version 1.1: 2018-07-11
    Changes: Data collection, Database references