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Mechanisms of Ras protein targeting in mammalian cells

J R Silvius1

  • 1Department of Biochemistry, McGill University, Montréal, Québec, Canada H3G 1Y6. silvius@med.mcgill.ca

The Journal of Membrane Biology
|December 11, 2002
PubMed

Insights

Ras proteins are crucial for cell functions and cancer, needing to reach the plasma membrane. This review explores their complex intracellular journey and signaling from different cell compartments.

Area of Science:

  • Cellular Biology
  • Molecular Biology
  • Oncology

Background:

  • Classical Ras proteins (H-Ras, N-Ras, K-Ras4A/4B) are vital for physiological and oncogenic activities.
  • Ras protein function depends on correct localization to the plasma membrane.
  • Newly synthesized Ras proteins undergo processing on endomembranes before plasma membrane delivery.

Purpose of the Study:

  • To review recent advancements in understanding Ras protein intracellular trafficking.
  • To highlight the distinct pathways different Ras species utilize to reach the plasma membrane.
  • To discuss the dynamic movement of Ras proteins between cellular membranes and potential intracellular signaling.

Main Methods:

  • Literature review of recent studies on Ras protein localization and trafficking.
  • Analysis of experimental data on Ras protein processing and transport.
  • Synthesis of findings regarding Ras protein membrane dynamics and signaling.

Main Results:

  • Intracellular pathways for Ras protein delivery to the plasma membrane are being elucidated and vary by Ras type.
  • Mature Ras proteins can traffic between the plasma membrane and intracellular compartments.
  • Ras proteins may exhibit signaling functions from intracellular locations.

Conclusions:

  • Understanding Ras protein trafficking is key to comprehending their diverse cellular roles.
  • Further research is needed to fully resolve the complexities of Ras protein localization and signaling.
  • The dynamic nature of Ras protein localization suggests multifaceted regulatory mechanisms.

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