Gene interactions and pathways from curated databases and text-mining
EMBO J 2001, PMID: 11500364

Regulation of elongation factor 2 kinase by p90(RSK1) and p70 S6 kinase.

Wang, X; Li, W; Williams, M; Terada, N; Alessi, D R; Proud, C G

Elongation factor 2 kinase (eEF2k) phosphorylates and inactivates eEF2. Insulin induces dephosphorylation of eEF2 and inactivation of eEF2 kinase, and these effects are blocked by rapamycin, which inhibits the mammalian target of rapamycin, mTOR. However, the signalling mechanisms underlying these effects are unknown. Regulation of eEF2 phosphorylation and eEF2k activity is lost in cells in which phosphoinositide-dependent kinase 1 (PDK1) has been genetically knocked out. This is not due to loss of mTOR function since phosphorylation of another target of mTOR, initiation factor 4E-binding protein 1, is not defective. PDK1 is required for activation of members of the AGC kinase family; we show that two such kinases, p70 S6 kinase (regulated via mTOR) and p90(RSK1) (activated by Erk), phosphorylate eEF2k at a conserved serine and inhibit its activity. In response to insulin-like growth factor 1, which activates p70 S6 kinase but not Erk, regulation of eEF2 is blocked by rapamycin. In contrast, regulation of eEF2 by stimuli that activate Erk is insensitive to rapamycin, but blocked by inhibitors of MEK/Erk signalling, consistent with the involvement of p90(RSK1).

Document information provided by NCBI PubMed

Text Mining Data

Dashed line = No text mining data

Manually curated Databases

  • IRef Biogrid Interaction: EEF2K — RPS6KB1 (direct interaction, pull down)
  • IRef Biogrid Interaction: PRKACA — CREB1 (direct interaction, pull down)
  • IRef Biogrid Interaction: BAD — RPS6KA1 (direct interaction, pull down)
  • IRef Biogrid Interaction: EEF2K — RPS6KA1 (direct interaction, pull down)
  • IRef Biogrid Interaction: BAD — PRKACA (direct interaction, pull down)
  • IRef Biogrid Interaction: BAD — RPS6KA5 (direct interaction, pull down)
  • IRef Biogrid Interaction: RPS6KA5 — CREB1 (direct interaction, pull down)
  • IRef Biogrid Interaction: BAD — AKT1 (direct interaction, pull down)
  • IRef Hprd Interaction: EEF2K — RPS6KB1 (in vitro)
  • IRef Hprd Interaction: EEF2K — RPS6KB1 (in vivo)
  • IRef Hprd Interaction: EEF2K — PRKAA1 (in vitro)
  • IRef Hprd Interaction: EEF2K — PRKAA1 (in vivo)
  • IRef Hprd Interaction: EEF2K — RPS6KB2 (in vitro)
  • IRef Hprd Interaction: EEF2K — PRKACA (in vitro)
  • IRef Hprd Interaction: EEF2K — PRKACA (in vivo)
  • IRef Hprd Interaction: EEF2K — RPS6KA1 (in vivo)
  • IRef Hprd Interaction: EEF2K — RPS6KA1 (in vitro)
  • IRef Hprd Interaction: EEF2K — PRKAA2 (in vivo)
  • IRef Hprd Interaction: EEF2K — PRKAA2 (in vitro)
  • IRef Intact Interaction: RPS6KB2 — EEF2K (phosphorylation reaction, experimental interaction detection)
  • IRef Intact Interaction: RPS6KA1 — EEF2K (phosphorylation reaction, experimental interaction detection)
In total, 12 gene pairs are associated to this article in curated databases