The hnRNPA1 D262V amyotrophic lateral sclerosis (ALS) mutation is linked to mitochondrial dysfunction.

The hnRNPA1 D262V mutation in ALS is linked to significant mitochondrial dysfunction and fragmentation in mutant cells.

• Why it matters: Understanding how mutations in RNA-binding proteins affect cellular processes is crucial for uncovering mechanisms underlying neurodegeneration in ALS.
• What they did: Researchers used ribosome profiling to analyze translational dynamics in hnRNPA1 D262V mutant cells, revealing disrupted translation, altered splicing, and suppressed mTOR/AKT signaling.
• The result: Findings suggest that a single amino acid change in hnRNPA1 can impair cell growth and mitochondrial function, providing insights into neuronal death mechanisms in ALS.