Desensitization of the EGF receptor alters its ability to undergo EGF-induced dimerization

Dhandapani Kuppuswamy, Linda J. Pike

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Treatment of A431 cells with EGF has been shown to induce the formation of EGF receptor dimers. Sucrose density gradient centrifugation as well as surface radio-iodination followed by crosslinking were used to study further the properties of EGP receptor monomers and dimers as well as the regulation of dimer formation. We have shown previously that treatment of A431 cells with high doses of EGF at 37°C leads to the desensitization of the EGF receptor without a singificant loss of cell surface 125I-EGF binding [Kuppuswamy and Pike (1989) J. biol. Chem. 264, 3357-3363; Cunningham et al. (1989) J. biol. Chem. 264, 15351-15356]. Desensitization of the EGF receptor led to a decrease in the ability of receptor monomers to be induced to form dimers by EGF both in vitro and in vitro. These data suggest that the sensitivity of a cell to EGF may be modulated by altering the capacity of the EGF receptor to form oligomers.

Original languageEnglish
Pages (from-to)107-117
Number of pages11
JournalCellular Signalling
Issue number2
StatePublished - 1991


  • EGF receptor
  • desensitization
  • dimerization

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