TY - JOUR T1 - Depletion of the RNA-binding protein PURA triggers changes in posttranscriptional gene regulation and loss of P-bodies JF - bioRxiv DO - 10.1101/2022.02.09.479353 SP - 2022.02.09.479353 AU - Lena Molitor AU - Melina Klostermann AU - Sabrina Bacher AU - Juliane Merl-Pham AU - Nadine Spranger AU - Sandra Burczyk AU - Carolin Ketteler AU - Ejona Rusha AU - Daniel Tews AU - Anna Pertek AU - Marcel Proske AU - Anke Busch AU - Sarah Reschke AU - Regina Feederle AU - Stefanie M. Hauck AU - Helmut Blum AU - Micha Drukker AU - Pamela Fischer-Posovszky AU - Julian König AU - Kathi Zarnack AU - Dierk Niessing Y1 - 2022/01/01 UR - http://biorxiv.org/content/early/2022/11/08/2022.02.09.479353.abstract N2 - The RNA-binding protein PURA has been implicated in the rare, monogenetic, neurodevelopmental disorder PURA Syndrome. PURA binds both DNA and RNA and has been associated with various cellular functions. Only little is known about its main cellular roles and the molecular pathways affected upon PURA depletion. Here, we show that PURA is predominantly located in the cytoplasm, where it binds to thousands of mRNAs. Many of these transcripts change abundance in response to PURA depletion. The encoded proteins suggest a role for PURA in immune responses, mitochondrial function, autophagy and processing (P)-body activity. Intriguingly, reduced PURA levels decrease the expression of the integral P-body components LSM14A and DDX6 and strongly affect P-body formation in human cells. Furthermore, PURA knockdown results in stabilization of P-body-enriched transcripts, whereas other mRNAs decrease. Hence, reduced PURA levels, as reported in patients with PURA Syndrome, influence the formation and composition of this phase-separated RNA processing machinery. Our study proposes PURA Syndrome as a new model to study the tight connection between P-body-associated RNA regulation and neurodevelopmental disorders.Competing Interest StatementThe authors have declared no competing interest. ER -