Subunit of mTORC2, which regulates cell growth and survival in response to hormonal signals. mTORC2 is activated by growth factors, but, in contrast to mTORC1, seems to be nutrient-insensitive. mTORC2 seems to function upstream of Rho GTPases to regulate the actin cytoskeleton, probably by activating one or more Rho-type guanine nucleotide exchange factors. mTORC2 promotes the serum-induced formation of stress-fibers or F-actin. mTORC2 plays a critical role in AKT1 'Ser-473' phosphorylation, which may facilitate the phosphorylation of the activation loop of AKT1 on 'Thr-308' by PDK1 which is a prerequisite for full activation. mTORC2 regulates the phosphorylation of SGK1 at 'Ser-422'. mTORC2 also modulates the phosphorylation of PRKCA on 'Ser-657'. Plays an essential role in embryonic growth and development. Part of the mammalian target of rapamycin complex 2 (mTORC2) which contains MTOR, MLST8, PRR5, RICTOR, MAPKAP1 and DEPTOR (PubMed:15268862, PubMed:15467718, PubMed:17461779, PubMed:17599906). Contrary to mTORC1, mTORC2 does not bind to and is not sensitive to FKBP12-rapamycin. Binds directly to MTOR and PRR5 within the TORC2 complex; interaction with MTOR is enhanced by deubiquitination of RICTOR by USP9X (PubMed:15268862, PubMed:17461779, PubMed:17599906, PubMed:33378666). Interaction with MAPKAP1 is not enhanced by RICTOR deubiquitination by USP9X (PubMed:33378666). Interacts with CCDC28B (PubMed:23727834). Interacts with NBN (PubMed:23762398). Interacts with PRR5L (PubMed:17461779, PubMed:21964062). Interacts with SIK3 (PubMed:30232230). Interacts with NCKAP1L (PubMed:32647003). Interacts with kinases GSK3A and GSK3B; the interactions lead to phosphorylation of RICTOR at 'Thr-1695' which facilitates its FBXW7-mediated ubiquitination and subsequent degradation (PubMed:25897075). Interacts with FBXW7; the interaction is enhanced by GSK3-mediated phosphorylation of 'Thr-1695' and results in RICTOR ubiquitination and degradation (PubMed:25897075). Interacts with USP9X; the interaction results in deubiquitination of RICTOR and protection from proteasomal degradation, thus promoting mTORC2 complex assembly (PubMed:33378666). (Microbial infection) Interacts with vaccinia virus protein F17; this interaction dysregulates mTOR. Phosphorylated by MTOR; when part of mTORC2 (PubMed:15467718). Phosphorylated at Thr-1135 by RPS6KB1; phosphorylation of RICTOR inhibits mTORC2 and AKT1 signaling (PubMed:19995915). Phosphorylated at Thr-1695 by GSK3A and GSK3B which facilitates RICTOR ubiquitination and subsequent degradation (PubMed:25897075). Ubiquitinated by the SCF(FBXW7) complex, leading to its degradation by the proteasome (PubMed:25897075). Deubiquitinated by USP9X; deubiquitination stabilizes RICTOR and enhances its binding to MTOR, thus promoting mTORC2 complex assembly (PubMed:33378666). May be produced at very low levels due to a premature stop codon in the mRNA, leading to nonsense-mediated mRNA decay. Belongs to the RICTOR family. Wrong choice of CDS.