Rheb Is Essential for Murine Development

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Abstract

Ras homolog enriched in brain (Rheb) couples growth factor signaling to activation of the target of rapamycin complex 1 (TORC1). To study its role in mammals, we generated a Rheb knockout mouse. In contrast to mTOR or regulatory-associated protein of mTOR (Raptor) mutants, the inner cell mass of Rheb(-/-) embryos differentiated normally. Nevertheless, Rheb(-/-) embryos died around midgestation, most likely due to impaired development of the cardiovascular system. Rheb(-/-) embryonic fibroblasts showed decreased TORC1 activity, were smaller, and showed impaired proliferation. Rheb heterozygosity extended the life span of tuberous sclerosis complex 1-deficient (Tsc1(-/-)) embryos, indicating that there is a genetic interaction between the Tsc1 and Rheb genes in mouse.
Original languageUndefined/Unknown
Pages (from-to)1672-1678
Number of pages7
JournalMolecular and Cellular Biology
Volume31
Issue number8
DOIs
Publication statusPublished - 2011

Research programs

  • EMC COEUR-09
  • EMC MGC-02-96-01
  • EMC ONWAR-01-94-01

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