6AW3

Crystal structure of the HopQ-CEACAM3 L44Q complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.66 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.242 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

TheHelicobacter pyloriadhesin protein HopQ exploits the dimer interface of human CEACAMs to facilitate translocation of the oncoprotein CagA.

Bonsor, D.A.Zhao, Q.Schmidinger, B.Weiss, E.Wang, J.Deredge, D.Beadenkopf, R.Dow, B.Fischer, W.Beckett, D.Wintrode, P.L.Haas, R.Sundberg, E.J.

(2018) EMBO J. 37: --

  • DOI: 10.15252/embj.201798664
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • <i>Helicobacter pylori </i> infects half of the world's population, and strains that encode the <i>cag </i> type IV secretion system for injection of the oncoprotein CagA into host gastric epithelial cells are associated with elevated levels of can ...

    Helicobacter pylori infects half of the world's population, and strains that encode the cag type IV secretion system for injection of the oncoprotein CagA into host gastric epithelial cells are associated with elevated levels of cancer. CagA translocation into host cells is dependent on interactions between the H. pylori adhesin protein HopQ and human CEACAMs. Here, we present high-resolution structures of several HopQ-CEACAM complexes and CEACAMs in their monomeric and dimeric forms establishing that HopQ uses a coupled folding and binding mechanism to engage the canonical CEACAM dimerization interface for CEACAM recognition. By combining mutagenesis with biophysical and functional analyses, we show that the modes of CEACAM recognition by HopQ and CEACAMs themselves are starkly different. Our data describe precise molecular mechanisms by which microbes exploit host CEACAMs for infection and enable future development of novel oncoprotein translocation inhibitors and H. pylori -specific antimicrobial agents.


    Organizational Affiliation

    Institute of Human Virology, University of Maryland School of Medicine, University of Maryland, Baltimore, MD, USA.,Institute of Human Virology, University of Maryland School of Medicine, University of Maryland, Baltimore, MD, USA esundberg@ihv.umaryland.edu.,Department of Chemistry and Biochemistry, University of Maryland, College Park, MD, USA.,Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland, Baltimore, MD, USA.,German Center for Infection Research (DZIF), Partner Site LMU, Munich, Germany.,Department of Microbiology and Immunology, University of Maryland School of Medicine, University of Maryland, Baltimore, MD, USA.,Chair of Medical Microbiology and Hospital Epidemiology, Max von Pettenkofer Institute, Faculty of Medicine, LMU Munich, Munich, Germany.,Department of Medicine, University of Maryland School of Medicine, University of Maryland, Baltimore, MD, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HopQ
B
439Helicobacter pyloriMutation(s): 0 
Gene Names: hopQ
Find proteins for H6A3H4 (Helicobacter pylori)
Go to UniProtKB:  H6A3H4
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Carcinoembryonic antigen-related cell adhesion molecule 3
A
109Homo sapiensMutation(s): 1 
Gene Names: CEACAM3 (CD66D, CGM1)
Find proteins for P40198 (Homo sapiens)
Go to Gene View: CEACAM3
Go to UniProtKB:  P40198
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.66 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.242 
  • Space Group: P 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 38.830α = 90.00
b = 102.594β = 90.00
c = 112.650γ = 90.00
Software Package:
Software NamePurpose
Aimlessdata scaling
XDSdata reduction
REFMACrefinement
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-05-16
    Type: Initial release
  • Version 1.1: 2018-07-11
    Type: Data collection, Database references