The neurodevelopmental disorder-linked PHF14 complex that forms biomolecular condensates detects DNA damage and promotes repair
Käsper, E.-L.; Hwang, I.-Y.; Grötsch, H.; Fung, K. H. H.; Serandour, A. A.; Arecco, N.; Oellers, R.; Polinski, P.; Garcia Gomez-Monedero, A.; Müller, C. W.; Noh, K.-M.
Show abstract
Numerous chromatin-associated proteins have been linked to neurodevelopmental disorders, yet their molecular functions often remain elusive. PHF14, HMG20A, TCF20 and RAI1 are components of a putative chromatin-associated complex and have been implicated in neurological disorders. Here, we found that Phf14 knockout embryonic stem cells and neural progenitor cells exhibit impaired cell cycle progression and proliferation, inadequate protection of stalled replication forks, and decreased DNA repair. The PHF14 complex rapidly assembles at DNA damage sites and binds to DNA through HMG20A. The PHF14 complex forms DNA-containing phase separated droplets in vitro, where TCF20 facilitates droplet formation. Furthermore, TCF20 maintenance at DNA damage sites is destabilized upon pathological mutation. Our results suggest that the PHF14 complex contributes to DNA damage repair by sensing damaged sites and forming biomolecular condensates, thus supporting cell cycle progression, especially in neural progenitor cells whose spatiotemporal pool is critical for proper brain development.
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