Functions of FUS/TLS from DNA repair to stress response: implications for ALS

Area of Science:

• Molecular Biology
• Neuroscience
• Genetics

Background:

• Fused in sarcoma (FUS) is a DNA/RNA-binding protein with roles in transcription, translation, splicing, and transport.
• Initially identified in cancer, FUS is now recognized for its involvement in neurodegenerative diseases, including amyotrophic lateral sclerosis (ALS) and frontotemporal lobar degeneration.
• The precise endogenous functions of FUS and their connection to disease pathogenesis remain under investigation.

Purpose of the Study:

• To review the known normal functions of FUS.
• To emphasize FUS's roles in DNA damage repair, RNA processing, and cellular stress response.
• To discuss how ALS-associated mutations may disrupt these functions and contribute to disease.

Main Methods:

• Literature review of FUS functions.
• Analysis of FUS involvement in DNA repair, RNA processing, and stress response pathways.
• Discussion of mutation-specific effects on FUS function.

Main Results:

• FUS plays a significant role in maintaining genomic stability through DNA damage repair.
• FUS is integral to various RNA processing events, including splicing and transport.
• Cellular stress conditions modulate FUS localization and function, impacting cellular homeostasis.

Conclusions:

• Understanding FUS's normal functions is key to deciphering its role in neurodegenerative diseases.
• ALS-causing mutations in FUS likely impair its normal cellular roles, leading to disease pathology.
• Further research into FUS pathways is critical for developing therapeutic strategies for ALS and related disorders.