RAS nanoclusters are cell surface transducers that convert extracellular stimuli to intracellular signalling

Area of Science:

• Molecular biology
• Cell signaling
• Oncogenesis

Background:

• Mutations in rat sarcoma virus (RAS) oncogenes (HRAS, KRAS, NRAS) are implicated in cancer and RASopathies.
• RAS proteins require localization to the plasma membrane (PM) for function, mediated by C-terminal lipid interactions.
• RAS-lipid interactions drive the formation of PM nanoclusters, critical for effector recruitment and signaling.

Purpose of the Study:

• To review the role of RAS nanoclusters in signal transduction.
• To explore how RAS nanoclusters convert external stimuli into intracellular signaling pathways.
• To highlight the importance of RAS nanocluster organization for understanding oncogenesis.

Main Methods:

• This review synthesizes existing research on RAS protein localization and function.
• It examines the mechanisms of RAS-lipid interactions and nanocluster formation.
• The review discusses the role of nanoclusters as transducers of external stimuli.

Main Results:

• RAS nanoclusters are formed through isoform-specific lipid interactions on the PM.
• These nanoclusters function as signaling platforms, recruiting downstream effectors.
• RAS nanoclusters act as transducers, converting environmental cues into mitogenic signals.

Conclusions:

• RAS nanocluster formation and lipid sorting are critical for RAS-mediated signaling.
• Understanding the interplay between RAS nanoclusters and cell surface stimuli is essential for targeting RAS oncogenesis.
• RAS nanoclusters represent a key mechanism for converting external signals into intracellular responses.