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Related Experiment Videos

C2 can do it, too.

Holger Sondermann1, John Kuriyan

  • 1Howard Hughes Medical Institute, Department of Molecular and Cell Biology, Berkeley, California 94720, USA.

Cell
|April 27, 2005
PubMed
Summary
This summary is machine-generated.

The C2 domain of serine/threonine protein kinase Cdelta binds phosphotyrosine, a novel function challenging prior understanding of C2 domains. This discovery reveals new signaling pathway crosstalk mechanisms.

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Area of Science:

  • Molecular Biology
  • Cell Signaling
  • Structural Biology

Background:

  • C2 domains were traditionally known to bind phospholipids or unphosphorylated proteins.
  • SH2 and PTB domains were the only known phosphotyrosine-binding signaling domains.

Discussion:

  • This study reveals the C2 domain of serine/threonine protein kinase Cdelta as a phosphotyrosine binding domain.
  • The crystal structure of the C2 domain bound to a phosphotyrosine-containing peptide is presented.

Key Insights:

  • C2 domains possess a previously unrecognized ability to bind phosphotyrosine.
  • This finding links phosphotyrosine recognition directly to serine/threonine kinase activity.

Outlook:

  • Uncovers novel mechanisms for crosstalk between distinct cell signaling pathways.
  • Opens new avenues for understanding kinase regulation and signaling network integration.