PMID: 19966800 , Related PDB id: 3IEC

Authors:

Nesic D, Miller MC, Quinkert ZT, Stein M, Chait BT, Stebbins CE

Title:

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

Journal:

Nat Struct Mol Biol. 2010 Jan;17(1):130-2. Epub 2009 Dec 6.

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. Mutagenesis of conserved residues central to this interaction renders CagA inactive as an inhibitor of MARK2.