The RAL signaling network: Cancer and beyond

Area of Science:

• Molecular Biology
• Cellular Signaling
• Oncology

Background:

• RAL proteins (RALA and RALB) are small GTPases regulating cellular processes.
• They function as molecular switches, cycling between GDP- and GTP-bound states.
• RAL GTPases are implicated in diverse physiological functions and diseases.

Purpose of the Study:

• To provide an overview of RAL GTPase functions in normal and pathological conditions.
• To summarize current knowledge on RAL's involvement in human diseases.
• To discuss therapeutic targeting strategies for RAL GTPases.

Main Methods:

• Literature review and synthesis of existing research on RAL GTPases.
• Analysis of molecular mechanisms controlling RAL activity and effector usage.
• Exploration of RAS-independent regulation of RAL signaling.

Main Results:

• RAL proteins exhibit isoform-specific functions in exocytosis, endocytosis, actin organization, and gene expression.
• RAL GTPases are critical drivers of oncogenic RAS-driven transformation, promoting cell migration, metastasis, proliferation, and survival.
• RAL signaling is involved in neuronal plasticity, immune response, and metabolic homeostasis.

Conclusions:

• RAL GTPases play multifaceted roles in normal physiology and disease, particularly in cancer.
• Understanding the complexity of RAL signaling networks is essential for developing targeted therapies.
• Emerging evidence points to the significance of RAS-independent RAL regulation.