Cited by 6,216PI3K/AKT/mTOR signaling in cancerMetabolism, Diabetes, and CancerProtein Kinase Regulation and GTPase Signaling

Phosphorylation and regulation of Akt/PKB by the rictor-mTOR complex

Sarbassov, Dos D., Guertin, David A., Ali, Siraj M., Sabatini, David M.·2005·Science

Abstract

Deregulation of Akt/protein kinase B (PKB) is implicated in the pathogenesis of cancer and diabetes. Akt/PKB activation requires the phosphorylation of Thr 308 in the activation loop by the phosphoinositide-dependent kinase 1 (PDK1) and Ser 473 within the carboxyl-terminal hydrophobic motif by an unknown kinase. We show that in Drosophila and human cells the target of rapamycin (TOR) kinase and its associated protein rictor are necessary for Ser 473 phosphorylation and that a reduction in rictor or mammalian TOR (mTOR) expression inhibited an Akt/PKB effector. The rictor-mTOR complex directly phosphorylated Akt/PKB on Ser 473 in vitro and facilitated Thr 308 phosphorylation by PDK1. Rictor-mTOR may serve as a drug target in tumors that have lost the expression of PTEN, a tumor suppressor that opposes Akt/PKB activation.

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Crossref · 10.1126/science.1106148

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Authors
Sarbassov, D. D., Guertin, D. A., Ali, S. M., & Sabatini, D. M.
Affiliations
Broad Institute (US)
Corresponding author
  • Guertin, David A.
  • Ali, Siraj M.
  • Sabatini, David M.
Venue
Science
Published
2005-02-18
Volume
307
Issue
5712
Pages
1098-1101
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W4238567307
Cited by
6,216
References
28
Citations by year
2026: 119 · 2025: 176 · 2024: 229 · 2023: 275 · 2022: 254 · 2021: 323 · 2020: 324 · 2019: 318 · 2018: 350 · 2017: 329 · 2016: 303 · 2015: 396 · 2014: 358 · 2013: 386 · 2012: 378
FWCI
86.71
Type
journal article
Language
en
Open access
closed
Locations
  • Science (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Allergy and Infectious Diseases (R01 AI47389, R01AI047389)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
Keywords
Akt/protein kinase B, Rictor, mTOR, TOR signaling, Ser473 phosphorylation, PDPK1, kinase regulation, PTEN, cancer, therapeutic target, Drosophila
MeSH terms
Regulatory-Associated Protein of mTOR, Rapamycin-Insensitive Companion of mTOR Protein, Animals, Carrier Proteins, Cell Line, Drosophila melanogaster, Enzyme Activation, Humans, Phosphorylation, Protein Kinases, Proteins, Proto-Oncogene Proteins, Serine, Protein Serine-Threonine Kinases, Phosphatidylinositol 3-Kinases, Drosophila Proteins, RNA Interference, Cell Line, Tumor, Immunoprecipitation, Adaptor Proteins, Signal Transducing, Proto-Oncogene Proteins c-akt, Hydrophobic and Hydrophilic Interactions, TOR Serine-Threonine Kinases, 3-Phosphoinositide-Dependent Protein Kinases

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