3IEC

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.204 

wwPDB Validation 3D Report Full Report


This is version 1.2 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

  • 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/MARK ...

    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

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serine/threonine-protein kinase MARK2
A, B, C, D
319Homo sapiensMutation(s): 1 
Gene Names: MARK2 (EMK1)
EC: 2.7.11.1, 2.7.11.26
Find proteins for Q7KZI7 (Homo sapiens)
Go to Gene View: MARK2
Go to UniProtKB:  Q7KZI7
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Cytotoxicity-associated immunodominant antigen
E, F, G, H
125Helicobacter pylori (strain ATCC 700392 / 26695)Mutation(s): 0 
Gene Names: cagA (cag26, cai)
Find proteins for P55980 (Helicobacter pylori (strain ATCC 700392 / 26695))
Go to UniProtKB:  P55980
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.204 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 93.466α = 90.00
b = 93.256β = 100.94
c = 113.955γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
REFMACrefinement
PDB_EXTRACTdata extraction
SCALEPACKdata scaling
DENZOdata reduction
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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