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News
A new study reveals how neurons manage to accurately read extraordinarily long genes — and it all comes down to a protein called SFPQ. Researchers found that SFPQ uses long RNA molecules as scaffolds to build "condensate" workspaces in the cell nucleus, coordinating transcription, splicing, and gene regulation. Disrupting these structures impairs gene expression and may be linked to autism and ALS.
Neurons rely on some of the longest genes in the human genome — stretching over 100,000 to 2 million base pairs — to build synapses and neural circuits. But reading genes that long is no small feat, and researchers have long suspected that neurons must have special mechanisms to pull it off. Now, a study published in Cell Chemical Biology has finally shed light on how.
The key player is a protein called SFPQ. Using super-resolution microscopy, researchers at Ehime University discovered that SFPQ uses long RNA molecules as scaffolds to form mesh-like, membraneless structures — called condensates — inside the cell nucleus. These condensates act as shared "workspaces," bringing together the molecular machinery needed for transcription, RNA splicing, and chromatin regulation all at once. When SFPQ condensates couldn't form, extra-long genes weren't read properly, RNA splicing was disrupted, and overall gene expression dropped.
Key Takeaways:
Why it matters: This discovery offers a new framework for understanding how the brain's genetic machinery is spatially organized — and opens a door to investigating how disruptions in this system may contribute to conditions like ALS and autism.
