RGD Reference Report - GbetaL, a positive regulator of the rapamycin-sensitive pathway required for the nutrient-sensitive interaction between raptor and mTOR. - Rat Genome Database

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GbetaL, a positive regulator of the rapamycin-sensitive pathway required for the nutrient-sensitive interaction between raptor and mTOR.

Authors: Kim, DH  Sarbassov, DD  Ali, SM  Latek, RR  Guntur, KV  Erdjument-Bromage, H  Tempst, P  Sabatini, DM 
Citation: Kim DH, etal., Mol Cell. 2003 Apr;11(4):895-904.
RGD ID: 1626104
Pubmed: PMID:12718876   (View Abstract at PubMed)

mTOR and raptor are components of a signaling pathway that regulates mammalian cell growth in response to nutrients and growth factors. Here, we identify a member of this pathway, a protein named GbetaL that binds to the kinase domain of mTOR and stabilizes the interaction of raptor with mTOR. Like mTOR and raptor, GbetaL participates in nutrient- and growth factor-mediated signaling to S6K1, a downstream effector of mTOR, and in the control of cell size. The binding of GbetaL to mTOR strongly stimulates the kinase activity of mTOR toward S6K1 and 4E-BP1, an effect reversed by the stable interaction of raptor with mTOR. Interestingly, nutrients and rapamycin regulate the association between mTOR and raptor only in complexes that also contain GbetaL. Thus, we propose that the opposing effects on mTOR activity of the GbetaL- and raptor-mediated interactions regulate the mTOR pathway.



Molecular Pathway Annotations    Click to see Annotation Detail View

RGD Manual Annotations


  
Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
MLST8HumanmTOR signaling pathway   IDA  RGD 
Mlst8RatmTOR signaling pathway   ISOMLST8 (Homo sapiens) RGD 
Mlst8MousemTOR signaling pathway   ISOMLST8 (Homo sapiens) RGD 
Objects Annotated

Genes (Rattus norvegicus)
Mlst8  (MTOR associated protein, LST8 homolog)

Genes (Mus musculus)
Mlst8  (MTOR associated protein, LST8 homolog (S. cerevisiae))

Genes (Homo sapiens)
MLST8  (MTOR associated protein, LST8 homolog)


Additional Information