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Related Experiment Videos

The ras/cholesterol connection: implications for ras oncogenicity.

A D Cox1, C J Der

  • 1La Jolla Cancer Research Foundation, Cancer Research Center 92037.

Critical Reviews in Oncogenesis
|January 1, 1992
PubMed
Summary
This summary is machine-generated.

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Mutated ras genes contribute to cancer by requiring posttranslational modifications for plasma membrane association, crucial for oncogenicity. Farnesol

Area of Science:

  • Oncogenic signaling pathways
  • Molecular biology of cancer
  • Protein posttranslational modifications

Background:

  • Mutated ras genes are frequently detected in various cancers, suggesting a significant role in human malignancies.
  • Ras protein association with the plasma membrane is critical for its oncogenic activity.
  • Ras protein trafficking to the plasma membrane involves farnesylation, proteolysis, and carboxymethylation, signaled by the C-terminal CAAX motif.

Purpose of the Study:

  • To review the role of posttranslational processing in ras-membrane interaction and transforming activity.
  • To update recent studies on isoprenoid modification in the function of ras and other proteins.
  • To explore farnesol-linked interactions for understanding ras oncogenic actions and identifying therapeutic targets.

Main Methods:

Related Experiment Videos

  • Literature review of studies on ras gene mutations and cancer.
  • Analysis of posttranslational modifications (farnesylation, proteolysis, carboxymethylation) of ras proteins.
  • Examination of isoprenoid modification in protein function.

Main Results:

  • Ras protein association with the plasma membrane is essential for oncogenicity.
  • Farnesol, an intermediate in cholesterol biosynthesis, is covalently attached to ras proteins.
  • Enzymes involved in ras processing are potential targets for pharmacologic intervention.

Conclusions:

  • Posttranslational modifications are critical for ras protein function and membrane association.
  • Isoprenoid modification plays a key role in the function of ras and other proteins.
  • Ras proteins serve as a model for understanding isoprenoid modification's role in protein function.