Related Experiment Video
Updated: Apr 21, 2026

Detection of Small GTPase Prenylation and GTP Binding Using Membrane Fractionation and GTPase-linked Immunosorbent Assay
Published on: November 11, 2018
Molecular pathways: targeting the kinase effectors of RHO-family GTPases
Tatiana Y Prudnikova1, Sonali J Rawat2, Jonathan Chernoff3
1Cancer Biology Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania.
Abstract:
RHO GTPases, members of the RAS superfamily of small GTPases, are adhesion and growth factor-activated molecular switches that play important roles in tumor development and progression. When activated, RHO-family GTPases such as RAC1, CDC42, and RHOA, transmit signals by recruiting a variety of effector proteins, including the protein kinases PAK, ACK, MLK, MRCK, and ROCK. Genetically induced loss of RHO function impedes transformation by a number of oncogenic stimuli, leading to an interest in developing small-molecule inhibitors that either target RHO GTPases directly, or that target their downstream protein kinase effectors. Although inhibitors of RHO GTPases and their downstream signaling kinases have not yet been widely adopted for clinical use, their potential value as cancer therapeutics continues to facilitate pharmaceutical research and development and is a promising therapeutic strategy.
Insights
RHO GTPases are key regulators in cancer development. Inhibiting these proteins or their effectors shows promise as a novel cancer therapeutic strategy.
Area of Science:
- Molecular Biology
- Oncology
- Biochemistry
Background:
- RHO GTPases are critical molecular switches activated by adhesion and growth factors.
- They are involved in crucial cellular processes like tumor development and progression.
- Key RHO-family GTPases include RAC1, CDC42, and RHOA, which signal through various effector proteins.
Purpose of the Study:
- To explore the therapeutic potential of targeting RHO GTPases and their downstream effectors in cancer.
- To review the development of small-molecule inhibitors for RHO GTPases and their associated protein kinases.
Main Methods:
- This study reviews existing research on RHO GTPase signaling pathways in cancer.
- It focuses on the development and potential application of small-molecule inhibitors.
Main Results:
- Loss of RHO function inhibits transformation induced by oncogenic stimuli.
- Small-molecule inhibitors targeting RHO GTPases or their downstream kinases are under development.
- These inhibitors represent a promising strategy for cancer therapy.
Conclusions:
- Targeting RHO GTPases and their downstream signaling kinases is a viable therapeutic strategy for cancer.
- Pharmaceutical research is actively pursuing these inhibitors for clinical use.
- Despite not being widely adopted yet, these inhibitors hold significant promise for cancer treatment.
Related Concept Videos
Small GTPases - Ras and Rho
Three regulatory proteins control their activity:
MAPK Signaling Cascades
Interactions Between Signaling Pathways
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
Amplifying Signals via Enzymatic Cascade
PI3K/mTOR/AKT Signaling Pathway
Cell Polarization by Rho Proteins

