Functional and biochemical association of Hck with the LIF/IL-6 receptor signal transducing subunit gp130 in embryonic stem cells

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Abstract

The role played by the Src-related tyrosine kinase, Hck, in embryonic stem (ES) cell differentiation was investigated by replacing a conserved C-terminally located tyrosine with phenylalanine by gene targeting. Targeted ES cells display a 7- to 9-fold elevation in constitutive Hck kinase activity and require ~ 15 times less leukaemia inhibitory factor (LIF) than parental ES cells to maintain their stem cell character in vitro. We also demonstrate a rapid and transient increase in Hck tyrosine kinase activity in parental ES cells stimulated by LIF and, finally, show that Hck is physically associated with gp130, an affinity converter and signal transducing component of the LIF receptor. Thus, these results provide biological and biochemical evidence that Hck participates in signal transduction from the LIF receptor.

Original languageEnglish
Pages (from-to)1574-1584
Number of pages11
JournalThe EMBO Journal
Volume13
Issue number7
Publication statusPublished - 1 Apr 1994
Externally publishedYes

Keywords

  • Gene targeting
  • gp 130
  • Hck
  • LIF receptor
  • Signal transduction

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