ATP biphasically modulates LLPS of TDP-43 PLD by specifically binding arginine residues.
ATP biphasically modulates LLPS of TDP-43 PLD by specifically binding arginine residues.
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DOI:
10.1038/s42003-021-02247-2
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发表时间:
2021-06-10
影响因子:
5.9
通讯作者:
Song J
中科院分区:
文献类型:
--
作者:
Dang M;Lim L;Kang J;Song J
Mysteriously neurons maintain ATP concentrations of ~3 mM but whether ATP modulates TDP-43 LLPS remains completely unexplored. Here we characterized the effect of ATP on LLPS of TDP-43 PLD and seven mutants by DIC and NMR. The results revealed: 1) ATP induces and subsequently dissolves LLPS of TDP-43 PLD by specifically binding Arg saturated at 1:100. 2) ATP modifies the conformation-specific electrostatic property beyond just imposing screening effect. 3) Reversibility of LLPS of TDP-43 PLD and further exaggeration into aggregation appear to be controlled by a delicate network composed of both attractive and inhibitory interactions. Results together establish that ATP might be a universal but specific regulator for most, if not all, R-containing intrinsically-disordered regions by altering physicochemical properties, conformations, dynamics, LLPS and aggregation. Under physiological conditions, TDP-43 is highly bound with ATP and thus inhibited for LLPS, highlighting a central role of ATP in cell physiology, pathology and aging. Dang Mei et al. use NMR and microscopy approaches to examine how ATP impacts the liquid-liquid phase separation (LLPS) of prion-like domains in TDP-43, a RNA-binding protein that is implicated in ALS and other neurological disorders. Their results suggest that ATP specifically binds to a subset of TDP-43 arginine residues at a particular molar ratio to modulate LLPS, and provides insight into how ATP affects the LLPS of biomolecular systems.
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影响因子:
9.8
作者:
Lim L;Wei Y;Lu Y;Song J
通讯作者:
Song J
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Fuxreiter M