A Molecular Grammar Governing the Driving Forces for Phase Separation of Prion-like RNA Binding Proteins.

A Molecular Grammar Governing the Driving Forces for Phase Separation of Prion-like RNA Binding Proteins.
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DOI:
10.1016/j.cell.2018.06.006
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发表时间:
2018-07-26
期刊:
影响因子:
64.5
通讯作者:
Hyman AA
Hyman AA
中科院分区:
生物学1区
文献类型:
--
作者:
Wang J;Choi JM;Holehouse AS;Lee HO;Zhang X;Jahnel M;Maharana S;Lemaitre R;Pozniakovsky A;Drechsel D;Poser I;Pappu RV;Alberti S;Hyman AA

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Proteins such as FUS phase separate to form liquid-like condensates that can harden into less dynamic structures. However, how these properties emerge from the collective interactions of many amino acids remains largely unknown. Here, we use extensive mutagenesis to identify a sequence-encoded molecular grammar underlying the driving forces for phase separation of proteins of the FUS family, and test aspects of this grammar in cells. Phase separation is governed primarily by multivalent interactions amongst tyrosine residues from prion-like domains and arginine residues from RNA binding domains, which are modulated by negatively charged residues. Glycine residues enhance the fluidity, whereas glutamine and serine residues promote hardening. We develop a model to show that the measured saturation concentrations of phase separation are inversely proportional to the product of the numbers of arginine and tyrosine residues. These results suggest it is possible to predict phase separation properties based on amino acid sequence. The phase separation behavior of FUS family proteins can be predicted from the prevalence and position of specific amino acids.
低复杂性蛋白段的原子结构揭示了组装网络的扭结β薄片。
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