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Fully Processed Recombinant KRAS4b: Isolating and Characterizing the Farnesylated and Methylated Protein
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Chemistry and biology of Ras farnesyltransferase

Kwang-Nym Cho1, Kee-In Lee

  • 1Bio-Organic Science Division, Korea Research Institute of Chemical Technology, P.O. Box 107, Yusong, Taejon 305-600, Korea.

Archives of Pharmacal Research
|January 4, 2003
PubMed

Insights

Mutated ras proteins drive cancer by promoting uncontrolled cell growth. Inhibiting Ras farnesyltransferase (FTase) blocks this process by preventing Ras from reaching the cell membrane, offering a potential cancer therapy.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Mutated ras oncogenes are prevalent in human tumors, particularly colon and pancreatic cancers.
  • The Ras protein (p21(ras)) is crucial for cell signaling, differentiation, and proliferation, but mutations lead to constant activation and uncontrolled cell growth.
  • Ras requires farnesylation, a post-translational modification, for plasma membrane association and oncogenic activity.

Purpose of the Study:

  • To investigate Ras farnesyltransferase (FTase) as a therapeutic target for cancers driven by mutated Ras.
  • To understand the role of farnesylation in Ras protein localization and function.

Main Methods:

  • Focus on the enzymatic activity of Ras farnesyltransferase (FTase).
  • Exploration of FTase as a target for selective inhibition.
  • Analysis of the post-translational modification process of farnesylation.

Main Results:

  • Mutated Ras proteins are constitutively active, promoting uncontrolled cell proliferation.
  • Farnesylation is essential for Ras membrane localization and oncogenic function.
  • Inhibition of FTase prevents Ras from associating with the plasma membrane.

Conclusions:

  • Ras farnesyltransferase (FTase) is a critical enzyme in oncogenic Ras signaling.
  • Selective inhibition of FTase represents a promising therapeutic strategy to disrupt oncogenic Ras function and treat associated cancers.

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