3IEC

Helicobacter pylori CagA Inhibits PAR1/MARK Family Kinases by Mimicking Host Substrates

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.206 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history. 


Literature

Helicobacter pylori CagA inhibits PAR1-MARK family kinases by mimicking host substrates.

Nesic, D., Miller, M.C., Quinkert, Z.T., Stein, M., Chait, B.T., Stebbins, C.E.

(2010) Nat Struct Mol Biol 17: 130-132

  • DOI: 10.1038/nsmb.1705
  • Primary Citation of Related Structures:  
    3IEC

  • PubMed Abstract: 

    • The CagA protein of Helicobacter pylori interacts with numerous cellular factors and is associated with increased virulence and risk of gastric carcinoma. We present here the cocrystal structure of a subdomain of CagA with the human kinase PAR1b/MARK2, revealing that a CagA peptide mimics substrates of this kinase family, resembling eukaryotic protein kinase inhibitors ...

    The CagA protein of Helicobacter pylori interacts with numerous cellular factors and is associated with increased virulence and risk of gastric carcinoma. We present here the cocrystal structure of a subdomain of CagA with the human kinase PAR1b/MARK2, revealing that a CagA peptide mimics substrates of this kinase family, resembling eukaryotic protein kinase inhibitors. Mutagenesis of conserved residues central to this interaction renders CagA inactive as an inhibitor of MARK2.

    Organizational Affiliation: 

    Laboratory of Structural Microbiology, Rockefeller University, New York, New York, USA.



Macromolecules
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Serine/threonine-protein kinase MARK2A, B, C, D319Homo sapiensMutation(s): 1 
Gene Names: CagA, EMK1, MARK2
EC: 2.7.11.1 (PDB Primary Data), 2.7.11.26 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for Q7KZI7 (Homo sapiens)
Explore Q7KZI7 
Go to UniProtKB:  Q7KZI7
PHAROS:  Q7KZI7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ7KZI7
Protein Feature View
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  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Cytotoxicity-associated immunodominant antigenE, F, G, H125Helicobacter pyloriMutation(s): 0 
Gene Names: cagA, cai
UniProt
Find proteins for P55980 (Helicobacter pylori (strain ATCC 700392 / 26695))
Explore P55980 
Go to UniProtKB:  P55980
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP55980
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.206 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 93.466α = 90
b = 93.256β = 100.94
c = 113.955γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-12-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2017-11-01
    Changes: Refinement description
  • Version 1.3: 2021-10-13
    Changes: Database references