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Shining light on DHX9: UV-induced stress granules illuminate protective mechanisms for daughter cell resilience.

Molecular Cell 2024 April 19
In a recent article in Cell, Zhou et al. investigate the origins, composition, and biological consequences of UV-induced stress granules. They find that UV-induced stress granules are triggered by the formation of RNA-protein crosslinks, uniquely contain DHX9 as a marker, form during mitosis independently of translation repression, and are enriched in intron-containing RNAs and splicing factors. Moreover, UV-induced granules contain double-stranded RNA (dsRNA) and trigger a dsRNA response. This work identifies a mechanism for resolving UV-damaged RNA and broadens the types of cytosolic "stress granules" that form.

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