A Global Analysis of the Receptor Tyrosine Kinase-Protein Phosphatase Interactome

Mol Cell. 2017 Jan 19;65(2):347-360. doi: 10.1016/j.molcel.2016.12.004. Epub 2017 Jan 5.

Abstract

Receptor tyrosine kinases (RTKs) and protein phosphatases comprise protein families that play crucial roles in cell signaling. We used two protein-protein interaction (PPI) approaches, the membrane yeast two-hybrid (MYTH) and the mammalian membrane two-hybrid (MaMTH), to map the PPIs between human RTKs and phosphatases. The resulting RTK-phosphatase interactome reveals a considerable number of previously unidentified interactions and suggests specific roles for different phosphatase families. Additionally, the differential PPIs of some protein tyrosine phosphatases (PTPs) and their mutants suggest diverse mechanisms of these PTPs in the regulation of RTK signaling. We further found that PTPRH and PTPRB directly dephosphorylate EGFR and repress its downstream signaling. By contrast, PTPRA plays a dual role in EGFR signaling: besides facilitating EGFR dephosphorylation, it enhances downstream ERK signaling by activating SRC. This comprehensive RTK-phosphatase interactome study provides a broad and deep view of RTK signaling.

Keywords: MYTH; MaMTH; PTP; PTPRA; PTPRB; PTPRH; RTK; SRC; dephosphorylation; phosphatase.

MeSH terms

  • Animals
  • Enzyme Activation
  • Epidermal Growth Factor / pharmacology
  • ErbB Receptors / agonists
  • ErbB Receptors / genetics
  • ErbB Receptors / metabolism*
  • HEK293 Cells
  • Humans
  • Mice
  • Mutation
  • Phosphorylation
  • Protein Interaction Mapping
  • Protein Interaction Maps*
  • Receptor-Like Protein Tyrosine Phosphatases, Class 3 / genetics
  • Receptor-Like Protein Tyrosine Phosphatases, Class 3 / metabolism
  • Receptor-Like Protein Tyrosine Phosphatases, Class 4 / genetics
  • Receptor-Like Protein Tyrosine Phosphatases, Class 4 / metabolism
  • Reproducibility of Results
  • Signal Transduction* / drug effects
  • Transfection
  • Two-Hybrid System Techniques
  • src-Family Kinases / genetics
  • src-Family Kinases / metabolism*

Substances

  • Epidermal Growth Factor
  • EGFR protein, human
  • ErbB Receptors
  • src-Family Kinases
  • PTPRA protein, human
  • PTPRB protein, human
  • PTPRH protein, human
  • Receptor-Like Protein Tyrosine Phosphatases, Class 3
  • Receptor-Like Protein Tyrosine Phosphatases, Class 4