Target intelligence / Profile preview

RAS family of GTPases (HRAS, KRAS, NRAS) (RAS)

Target
RAS
Molecular classification
Small GTPase, G protein
01

Overview

The RAS family of GTPases (HRAS, KRAS, and NRAS) are small GTPases that function as molecular switches in cell signaling pathways, regulating cell proliferation, differentiation, and survival. Mutations in RAS proteins are common oncogenic drivers in human cancers. They cycle between an active GTP-bound state and an inactive GDP-bound state, regulated by GEFs and GAPs. Isoforms differ in posttranslational modifications and membrane localization, potentially leading to unique signal outputs. While HRAS and NRAS knockouts are viable, KRAS knockout is embryonically lethal.

Other names
HRASKRASNRASGTPase HRasGTPase KRasGTPase NRasKRAS4AKRAS4B
02

Mechanism of action

Direct inhibition of KRAS^G12C^

03

Biological functions

Signal transductionCell proliferationCell differentiationCell survivalCytoskeletal organization
04

Disease associations

CancerSquamous cell carcinomaHematologic malignanciesLeukemia
05

Safety considerations

Historically considered "undruggable" due to high nucleotide affinity and lack of deep binding pocketsTissue-specific prevalence of mutations requires careful consideration of therapeutic strategiesPotential for resistance mechanisms to emergeOn-target and off-target toxicities
06

Interacting drugs

Sotorasib (AMG510)
07

Biomarkers

KRAS^G12C^ mutationKRAS^G12D^ mutation

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