3IEC image
Deposition Date 2009-07-22
Release Date 2009-12-08
Last Version Date 2024-02-21
Entry Detail
PDB ID:
3IEC
Keywords:
SIGNALING PROTEIN/TOXIN
Title:
Helicobacter pylori CagA Inhibits PAR1/MARK Family Kinases by Mimicking Host Substrates
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Helicobacter pylori (Taxon ID: 210)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.20 Å
R-Value Free:
0.24
R-Value Work:
0.20
R-Value Observed:
0.20
Space Group:
P 1 21 1
3IEC validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Serine/threonine-protein kinase MARK2
Gene (Uniprot):MARK2
Chain IDs:A, B, C, D
Chain Length:319
Number of Molecules:4
Biological Source:Homo sapiens
UniProt ID:Q7KZI7 Pfam ID:PF00069, PF00627
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Cytotoxicity-associated immunodominant antigen
Gene (Uniprot):cagA
Chain IDs:E, F, G, H
Chain Length:125
Number of Molecules:4
Biological Source:Helicobacter pylori
UniProt ID:P55980 Pfam ID:PF03507
Primary Citation
Helicobacter pylori CagA inhibits PAR1-MARK family kinases by mimicking host substrates.
Nat.Struct.Mol.Biol. 17 130 132 (2010)
PMID: 19966800 DOI: 10.1038/nsmb.1705

Abstact

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.

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Primary Citation of related structures
3IEC