Cited by 415PI3K/AKT/mTOR signaling in cancerProtein Kinase Regulation and GTPase SignalingProtein Tyrosine Phosphatases

PTEN: The down side of PI 3-kinase signalling

Leslie, Nick R., Downes, C.Peter·2002·Cellular Signalling

Abstract

The PTEN tumour suppressor protein is a phosphoinositide 3-phosphatase that, by metabolising phosphatidylinositol 3,4,5-trisphosphate (PtdIns(3,4,5)P(3)), acts in direct antagonism to growth factor stimulated PI 3-kinases. A wealth of data has now illuminated pathways that can be controlled by PTEN through PtdIns(3,4,5)P(3), some of which, when deregulated, give a selective advantage to tumour cells. Early studies of PTEN showed that its activity was able to promote cell cycle arrest and apoptosis and inhibit cell motility, but more recent data have identified other functional consequences of PTEN action, such as effects on the regulation of angiogenesis. The structure of PTEN includes several features not seen in related protein phosphatases, which adapt the enzyme to act efficiently as a lipid phosphatase, including a C2 domain tightly associated with the phosphatase domain, and a broader and deeper active site pocket. Several pieces of data indicate that PTEN is a principal regulator of the cellular levels of PtdIns(3,4,5)P(3), but work is only just beginning to uncover mechanisms by which the cellular activity of PTEN can be controlled. There also remains the vexing question of whether any of PTEN's cellular functions reflect its evolutionary roots as a member of the protein tyrosine phosphatase superfamily.

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Crossref · 10.1016/s0898-6568(01)00234-0

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  • PI3K/AKT is an intracellular pathway involved in regulation of cell cycle growth, proliferation, apoptosis, protein synthesis, and drug resistance in response to growth factors, cytokines, and hormones.

    “The phosphatidylinositol 3-kinase (PI3K)/protein kinase B (AKT) is an intracellular pathway involved in the regulation of a variety of critical cellular physiological processes involved in the cell cycle growth and proliferation and apoptosis, protein synthesis, and drug resistance in response to stimulation by growth factors, cytokines and hormones (Leslie and Downes 2002).”

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Authors
Leslie, N. R., & Downes, C. P.
Affiliations
University of Dundee (GB)
Venue
Cellular Signalling
Publisher
Elsevier BV
Published
2002-04
Volume
14
Issue
4
Pages
285-295
ISSN
0898-6568 (ISSN-L)
OpenAlex
W2069720095
Cited by
415
References
115
Citations by year
2026: 4 · 2025: 4 · 2024: 13 · 2023: 8 · 2022: 14 · 2021: 23 · 2020: 12 · 2019: 9 · 2018: 14 · 2017: 13 · 2016: 13 · 2015: 13 · 2014: 19 · 2013: 14 · 2012: 19
FWCI
2.67
Type
journal article
Language
en
Open access
closed
Locations
  • Cellular Signalling (publishedVersion)
  • PubMed (publishedVersion)
Funders
Medical Research Council
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 › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Tyrosine Phosphatases
Keywords
PTEN, phosphatidylinositol 3,4,5-trisphosphate, tumour suppressor, lipid phosphatase, C2 domain, angiogenesis regulation, cell cycle arrest, apoptosis, cell motility
MeSH terms
Phosphoinositide-3 Kinase Inhibitors, Animals, Inositol Phosphates, Models, Biological, Phosphoric Monoester Hydrolases, Signal Transduction, Protein Structure, Tertiary, Tumor Suppressor Proteins, PTEN Phosphohydrolase

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