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Rapamycin-insensitive companion of mTOR
(RICTOR) is an essential scaffold component of
mTOR complex 2 (mTORC2). RICTOR enables mTORC2-dependent
signalling through substrates including AKT, particularly
AKT phosphorylation at Ser473, as well as SGK and protein kinase C family
members. In many cancers, RICTOR expression, amplification, or
activity ↑ promotes cell survival, proliferation, metabolism,
migration, invasion, metastasis, and treatment resistance. Conversely,
RICTOR knockdown, degradation, or mTORC2 inhibition ↓
commonly reduces AKT Ser473 phosphorylation and suppresses tumour-cell growth
and motility. Record RICTOR gene amplification, mRNA expression, protein
abundance, and mTORC2 activity as separate endpoints when available. RICTOR
is separate from RPTOR/Raptor, which is a component of mTORC1.
Cancer review;
RICTOR and RTK signalling review.
-Typical cancer direction: RICTOR/mTORC2 ↑ = usually adverse; RICTOR/mTORC2 ↓ = usually anticancer.
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