Defining bone fide effectors of RAS GTPases

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Updated: Jul 24, 2025

Detection of Small GTPase Prenylation and GTP Binding Using Membrane Fractionation and GTPase-linked Immunosorbent Assay
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Detection of Small GTPase Prenylation and GTP Binding Using Membrane Fractionation and GTPase-linked Immunosorbent Assay

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Matthew J Smith1,2

  • 1Institute for Research in Immunology and Cancer, Université de Montréal, Montréal, Québec, Canada.

Bioessays : News and Reviews in Molecular, Cellular and Developmental Biology
|July 4, 2023
PubMed

Insights

RAS GTPases are crucial for development and cancer, but how they activate effector proteins remains unclear. This review examines known RAS-effector interactions, highlighting gaps in understanding their structural and mechanistic effects.

Area of Science:

  • Molecular Biology
  • Cellular Signaling
  • Cancer Biology

Background:

  • RAS GTPases are critical regulators of cell signaling, with mutations driving numerous human cancers.
  • Understanding RAS effector pathways is key to deciphering oncogenesis and developing targeted therapies.
  • Despite extensive research, the precise mechanisms by which RAS GTPases activate their effectors are not fully elucidated.

Approach:

  • This review synthesizes current knowledge on RAS-driven activation of effector proteins.
  • It focuses on the structural and mechanistic aspects of RAS-effector interactions.
  • The review also assesses the specificity of effector binding across the RAS superfamily.

Key Points:

  • True RAS effectors bind GTPases in a nucleotide-dependent manner, altering effector activity.
  • Mechanistic understanding of how RAS binding impacts effector function is limited for many proposed effectors.
  • Comprehensive analysis of effector binding specificity across the RAS superfamily is lacking.

Conclusions:

  • Significant gaps remain in characterizing RAS effector pathways, particularly regarding structural and mechanistic details.
  • Further research is needed to fully understand RAS-mediated signaling and its role in cancer.
  • Resolving these complexities is crucial for advancing cancer therapeutics and cell signaling research.
Keywords:
AFDNPI3KRAFRAS GTPasesRBD domainSCRIBadherens junctions

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