Molecular interactions contributing to FUS SYGQ LC-RGG phase separation and co-partitioning with RNA polymerase II heptads.
Molecular interactions contributing to FUS SYGQ LC-RGG phase separation and co-partitioning with RNA polymerase II heptads.
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DOI:
10.1038/s41594-021-00677-4
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发表时间:
2021-11
影响因子:
16.8
通讯作者:
Fawzi NL
中科院分区:
文献类型:
--
作者:
Murthy AC;Tang WS;Jovic N;Janke AM;Seo DH;Perdikari TM;Mittal J;Fawzi NL
The RNA-binding protein FUS mediates phase separation in biomolecular condensates and functions in transcription by clustering with RNA polymerase II. Specific contact residues and interactions modes formed by FUS and the C-terminal heptad repeats of RNA polymerase II (CTD) have been suggested but not probed directly. Here, we show how RGG domains contribute to phase separation with the FUS N-terminal low complexity domain (SYGQ LC) and RNA polymerase II CTD. Using NMR spectroscopy and molecular simulations, we demonstrate that many residue types, not solely arginine-tyrosine pairs, form condensed-phase contacts via several interaction modes including but not only sp2/π and cation-π interactions. In phases also containing RNA polymerase II CTD, many residue types form contacts, including both cation-π and hydrogen-bonding interactions formed by the conserved human CTD lysines. Hence, our data suggest a surprisingly broad array of residue types and modes explain co-phase separation of FUS and RNA polymerase II.
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