RNA buffers the phase separation behavior of prion-like RNA binding proteins

Shovamayee Maharana, Jie Wang, Dimitrios K. Papadopoulos, Doris Richter, Andrey Pozniakovsky, Ina Poser, Marc Bickle, Sandra Rizk, Jordina Guillén-Boixet, Titus M Franzmann, Marcus Jahnel, Lara Marrone, Young-Tae Chang, Jared Sterneckert, Pavel Tomancak, Anthony A Hyman, Simon Alberti

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Prion-like RNA binding proteins (RBPs) such as TDP43 and FUS are largely soluble in the nucleus but form solid pathological aggregates when mislocalized to the cytoplasm. What keeps these proteins soluble in the nucleus and promotes aggregation in the cytoplasm is still unknown. We report here that RNA critically regulates the phase behavior of prion-like RBPs. Low RNA/protein ratios promote phase separation into liquid droplets, whereas high ratios prevent droplet formation in vitro. Reduction of nuclear RNA levels or genetic ablation of RNA binding causes excessive phase separation and the formation of cytotoxic solid-like assemblies in cells. We propose that the nucleus is a buffered system in which high RNA concentrations keep RBPs soluble. Changes in RNA levels or RNA binding abilities of RBPs cause aberrant phase transitions.
Original languageEnglish
Pages (from-to)918-921
Number of pages4
Issue number6391
Early online date12 Apr 2018
Publication statusPublished - 25 May 2018


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