An Alternative Role for the Src‐Homology‐Domain‐Containing Phosphotyrosine Phosphatase (SH‐PTP2) in Regulating Epidermal‐Growth‐Factor‐Dependent Cell Growth

Steven Anthony Reeves, Bibrama Sinha, Inge Baur, Dirk Reinhold, Griffith Harsh

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

The association of the src homology 2 (SH2) domain‐containing tyrosine phosphatase (SH‐PTP2) with the activated epidermal growth factor (EGF) and platelet‐derived growth factor receptors, as well as the insulin receptor substrate 1 and growth‐factor‐receptor‐bound protein 2 and its intrinsic tyrosine phosphatase activity suggests an important role for this phosphatase in signal transduction. Previous studies have shown a positive role for SH‐PTP2 in growth‐factor‐mediated cell signaling. We show here that SH‐PTP2 can also function to negatively regulate EGF‐mediated signal transduction in the human glioma cell line SNB19. We demonstrate this by showing that, in SNB19 cells, which lack the ability to proliferate in response to EGF but retain the ability to bind EGF and also activate the EGF receptor as well as allow for the association of SH‐PTP2 with the phosphorylated receptor, stable overexpression of an interfering SH‐PTP2 mutant can restore the ability of these cells to proliferate in response to EGF.

Original languageEnglish (US)
Pages (from-to)55-61
Number of pages7
JournalEuropean Journal of Biochemistry
Volume233
Issue number1
DOIs
StatePublished - Oct 1995
Externally publishedYes

Keywords

  • epidermal growth factor
  • growth inhibition
  • src‐homology 2
  • src‐homology‐2‐domain‐containing phosphotyrosine phosphatase (SH‐PTP2)
  • tyrosine phosphatase

ASJC Scopus subject areas

  • Biochemistry

Fingerprint Dive into the research topics of 'An Alternative Role for the Src‐Homology‐Domain‐Containing Phosphotyrosine Phosphatase (SH‐PTP2) in Regulating Epidermal‐Growth‐Factor‐Dependent Cell Growth'. Together they form a unique fingerprint.

Cite this