PMID- 19935711 OWN - NLM STAT- MEDLINE DCOM- 20100312 LR - 20171116 IS - 1476-5594 (Electronic) IS - 0950-9232 (Linking) VI - 29 IP - 7 DP - 2010 Feb 18 TI - Rictor is a novel target of p70 S6 kinase-1. PG - 1003-16 LID - 10.1038/onc.2009.401 [doi] AB - The rapamycin-insensitive companion of mammalian target of rapamycin (mTOR) (Rictor) is a key member of mTOR complex-2 (mTORC2), which phosphorylates the AGC kinases Akt/PKB, PKC and SGK1 at a C-terminal hydrophobic motif. We identified several novel sites on Rictor that are phosphorylated, including Thr1135, which is conserved across all vertebrates. Phosphorylation of this site on Rictor is stimulated by amino acids and growth factors through a rapamycin-sensitive signaling cascade. We demonstrate here that Rictor is a direct target of the ribosomal protein S6 kinase-1 (S6K1). Rictor phosphorylation at Thr1135 does not lead to major changes in mTORC2-kinase activity. However, phosphorylation of this site turns over rapidly and mediates 14-3-3 binding to Rictor and mTORC2, providing possibility for altered interactions of the complex. These findings reveal an unexpected signaling input into mTORC2, which is regulated by amino acids, growth factors and rapamycin. FAU - Treins, C AU - Treins C AD - Signal Transduction Laboratory, Cancer Research UK London Research Institute, London, UK. FAU - Warne, P H AU - Warne PH FAU - Magnuson, M A AU - Magnuson MA FAU - Pende, M AU - Pende M FAU - Downward, J AU - Downward J LA - eng GR - Cancer Research UK/United Kingdom PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20091123 PL - England TA - Oncogene JT - Oncogene JID - 8711562 RN - 0 (14-3-3 Proteins) RN - 0 (Carrier Proteins) RN - 0 (Intercellular Signaling Peptides and Proteins) RN - 0 (Rapamycin-Insensitive Companion of mTOR Protein) RN - 0 (Transcription Factors) RN - 0 (rictor protein, rat) RN - 2ZD004190S (Threonine) RN - EC 2.7.11.1 (Ribosomal Protein S6 Kinases, 70-kDa) SB - IM MH - 14-3-3 Proteins/metabolism MH - Amino Acid Sequence MH - Animals MH - Carrier Proteins/chemistry/*metabolism MH - Cell Line MH - Humans MH - Intercellular Signaling Peptides and Proteins/pharmacology MH - Mice MH - Molecular Sequence Data MH - Phosphorylation MH - Rapamycin-Insensitive Companion of mTOR Protein MH - Rats MH - Ribosomal Protein S6 Kinases, 70-kDa/*metabolism MH - Threonine MH - Transcription Factors/metabolism EDAT- 2009/11/26 06:00 MHDA- 2010/03/13 06:00 CRDT- 2009/11/26 06:00 PHST- 2009/11/26 06:00 [entrez] PHST- 2009/11/26 06:00 [pubmed] PHST- 2010/03/13 06:00 [medline] AID - onc2009401 [pii] AID - 10.1038/onc.2009.401 [doi] PST - ppublish SO - Oncogene. 2010 Feb 18;29(7):1003-16. doi: 10.1038/onc.2009.401. Epub 2009 Nov 23.