TY - JOUR
T1 - Reentrant liquid condensate phase of proteins is stabilized by hydrophobic and non-ionic interactions
AU - Krainer, Georg
AU - Welsh, Timothy J.
AU - Joseph, Jerelle A.
AU - Espinosa, Jorge R.
AU - Wittmann, Sina
AU - de Csilléry, Ella
AU - Sridhar, Akshay
AU - Toprakcioglu, Zenon
AU - Gudiškytė, Giedre
AU - Czekalska, Magdalena A.
AU - Arter, William E.
AU - Guillén-Boixet, Jordina
AU - Franzmann, Titus M.
AU - Qamar, Seema
AU - George-Hyslop, Peter St
AU - Hyman, Anthony A.
AU - Collepardo-Guevara, Rosana
AU - Alberti, Simon
AU - Knowles, Tuomas P.J.
N1 - Publisher Copyright:
© 2021, The Author(s).
PY - 2021/12/1
Y1 - 2021/12/1
N2 - Liquid–liquid phase separation of proteins underpins the formation of membraneless compartments in living cells. Elucidating the molecular driving forces underlying protein phase transitions is therefore a key objective for understanding biological function and malfunction. Here we show that cellular proteins, which form condensates at low salt concentrations, including FUS, TDP-43, Brd4, Sox2, and Annexin A11, can reenter a phase-separated regime at high salt concentrations. By bringing together experiments and simulations, we demonstrate that this reentrant phase transition in the high-salt regime is driven by hydrophobic and non-ionic interactions, and is mechanistically distinct from the low-salt regime, where condensates are additionally stabilized by electrostatic forces. Our work thus sheds light on the cooperation of hydrophobic and non-ionic interactions as general driving forces in the condensation process, with important implications for aberrant function, druggability, and material properties of biomolecular condensates.
AB - Liquid–liquid phase separation of proteins underpins the formation of membraneless compartments in living cells. Elucidating the molecular driving forces underlying protein phase transitions is therefore a key objective for understanding biological function and malfunction. Here we show that cellular proteins, which form condensates at low salt concentrations, including FUS, TDP-43, Brd4, Sox2, and Annexin A11, can reenter a phase-separated regime at high salt concentrations. By bringing together experiments and simulations, we demonstrate that this reentrant phase transition in the high-salt regime is driven by hydrophobic and non-ionic interactions, and is mechanistically distinct from the low-salt regime, where condensates are additionally stabilized by electrostatic forces. Our work thus sheds light on the cooperation of hydrophobic and non-ionic interactions as general driving forces in the condensation process, with important implications for aberrant function, druggability, and material properties of biomolecular condensates.
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U2 - 10.1038/s41467-021-21181-9
DO - 10.1038/s41467-021-21181-9
M3 - Article
C2 - 33597515
AN - SCOPUS:85100820646
SN - 2041-1723
VL - 12
JO - Nature communications
JF - Nature communications
IS - 1
M1 - 1085
ER -