6GBG

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

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.205 

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 D115Homo sapiensMutation(s): 0 
Gene Names: CEACAM1, BGP, BGP1
Find proteins for P13688 (Homo sapiens)
Explore P13688 
Go to UniProtKB:  P13688
NIH Common Fund Data Resources
PHAROS:  P13688
GTEx:  ENSG00000079385
Protein Feature View
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  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Outer membrane protein A411Helicobacter pylori G27Mutation(s): 0 
Gene Names: hopQ, HPG27_1120
Find proteins for B5Z8H1 (Helicobacter pylori (strain G27))
Explore B5Z8H1 
Go to UniProtKB:  B5Z8H1
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BR
Query on BR
Download Ideal Coordinates CCD File 
A
BROMIDE ION
Br
CPELXLSAUQHCOX-UHFFFAOYSA-M		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.205 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 94.43α = 90
b = 94.43β = 90
c = 119.7γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
xia2data reduction
xia2data scaling
PHASERphasing

Structure Validation

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View more in-depth experimental data

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
    Changes: Data collection, Database references