Reversible oxidation and inactivation of protein tyrosine phosphatases in vivo

Mol Cell. 2002 Feb;9(2):387-99. doi: 10.1016/s1097-2765(02)00445-8.

Abstract

We have investigated the regulation of protein tyrosine phosphatases (PTPs) by reactive oxygen species (ROS) in a cellular environment. We demonstrate that multiple PTPs were reversibly oxidized and inactivated following treatment of Rat-1 cells with H(2)O(2) and that inhibition of PTP function was important for ROS-induced mitogenesis. Furthermore, we show transient oxidation of the SH2 domain containing PTP, SHP-2, in response to PDGF that requires association with the PDGFR. Our results indicate that SHP-2 inhibits PDGFR signaling and suggest a mechanism by which autophosphorylation of the PDGFR occurs despite its association with SHP-2. The data suggest that several PTPs may be regulated by oxidation and that characterization of this process may define novel links between specific PTPs and particular signaling pathways in vivo.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Animals
  • Cells, Cultured / drug effects
  • Cells, Cultured / metabolism
  • Fibroblasts / drug effects
  • Fibroblasts / metabolism
  • Hydrogen Peroxide / pharmacology
  • Intracellular Signaling Peptides and Proteins
  • Mitosis
  • Oxidation-Reduction
  • Phosphorylation
  • Platelet-Derived Growth Factor / pharmacology*
  • Protein Processing, Post-Translational / physiology*
  • Protein Tyrosine Phosphatase, Non-Receptor Type 11
  • Protein Tyrosine Phosphatase, Non-Receptor Type 6
  • Protein Tyrosine Phosphatases / antagonists & inhibitors
  • Protein Tyrosine Phosphatases / metabolism*
  • Rats
  • Reactive Oxygen Species / metabolism*
  • Receptors, Platelet-Derived Growth Factor / drug effects*
  • SH2 Domain-Containing Protein Tyrosine Phosphatases
  • Signal Transduction / drug effects*

Substances

  • Intracellular Signaling Peptides and Proteins
  • Platelet-Derived Growth Factor
  • Reactive Oxygen Species
  • Hydrogen Peroxide
  • Receptors, Platelet-Derived Growth Factor
  • Protein Tyrosine Phosphatase, Non-Receptor Type 11
  • Protein Tyrosine Phosphatase, Non-Receptor Type 6
  • Protein Tyrosine Phosphatases
  • Ptpn11 protein, rat
  • Ptpn6 protein, rat
  • SH2 Domain-Containing Protein Tyrosine Phosphatases