6GBG

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.201 

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:  

  • PubMed Abstract: 
  • The human gastric pathogen <i>Helicobacter pylori </i> 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 a ...

    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 and Molecular Microbiology, Structural Biology Research Center, VIB, Brussels, Belgium han.remaut@vub.be.,Imevax GmbH, Munich, Germany.,Structural Biology Brussels, Vrije Universiteit Brussel, Brussels, Belgium.,German Center for Infection Research, Partner Site Munich, Munich, Germany.,Division of Microbiology, Department of Biology, Friedrich Alexander University Erlangen, Erlangen, Germany.,Institute of Anatomy, Medical Faculty, University of Duisburg-Essen, Essen, Germany.,Institute of Immunology, Friedrich-Loeffler Institut, Greifswald-Insel Riems, Germany.,Institute for Medical Microbiology, Immunology and Hygiene, Technische Universität München, Munich, Germany.,Structural and Molecular Microbiology, Structural Biology Research Center, VIB, Brussels, Belgium.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Carcinoembryonic antigen-related cell adhesion molecule 1
D
115Homo sapiensMutation(s): 0 
Gene Names: CEACAM1 (BGP, BGP1)
Find proteins for P13688 (Homo sapiens)
Go to Gene View: CEACAM1
Go to UniProtKB:  P13688
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Outer membrane protein
A
411Helicobacter pylori (strain G27)Mutation(s): 0 
Gene Names: hopQ
Find proteins for B5Z8H1 (Helicobacter pylori (strain G27))
Go to UniProtKB:  B5Z8H1
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BR
Query on BR

Download SDF File 
Download CCD File 
A
BROMIDE ION
Br
CPELXLSAUQHCOX-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.201 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 94.430α = 90.00
b = 94.430β = 90.00
c = 119.700γ = 120.00
Software Package:
Software NamePurpose
xia2data reduction
PHASERphasing
REFMACrefinement
xia2data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Fonds Wetenschappelijk Onderzoek (FWO)Belgium12H8416N
Fonds Wetenschappelijk Onderzoek (FWO)BelgiumG033717N

Revision History 

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