Self-interaction of NPM1 modulates multiple mechanisms of liquid-liquid phase separation.
Self-interaction of NPM1 modulates multiple mechanisms of liquid-liquid phase separation.
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DOI:
10.1038/s41467-018-03255-3
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发表时间:
2018-02-26
影响因子:
16.6
通讯作者:
Kriwacki RW
中科院分区:
文献类型:
--
作者:
Mitrea DM;Cika JA;Stanley CB;Nourse A;Onuchic PL;Banerjee PR;Phillips AH;Park CG;Deniz AA;Kriwacki RW
Nucleophosmin (NPM1) is an abundant, oligomeric protein in the granular component of the nucleolus with roles in ribosome biogenesis. Pentameric NPM1 undergoes liquid–liquid phase separation (LLPS) via heterotypic interactions with nucleolar components, including ribosomal RNA (rRNA) and proteins which display multivalent arginine-rich linear motifs (R-motifs), and is integral to the liquid-like nucleolar matrix. Here we show that NPM1 can also undergo LLPS via homotypic interactions between its polyampholytic intrinsically disordered regions, a mechanism that opposes LLPS via heterotypic interactions. Using a combination of biophysical techniques, including confocal microscopy, SAXS, analytical ultracentrifugation, and single-molecule fluorescence, we describe how conformational changes within NPM1 control valency and switching between the different LLPS mechanisms. We propose that this newly discovered interplay between multiple LLPS mechanisms may influence the direction of vectorial pre-ribosomal particle assembly within, and exit from the nucleolus as part of the ribosome biogenesis process. The nucleolus is a membrane-less organelle formed through liquid–liquid phase separation (LLPS). Here the authors use biophysical methods and show that the nucleolar protein nucleophosmin (NPM1) also undergoes LLPS through homotypic, inter-NPM1 interactions and discuss implications for the ribosome biogenesis process.
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影响因子:
3.5
作者:
Amin, Mohammed Abdullahel;Matsunaga, Sachihiro;Fukui, Kiichi
通讯作者:
Fukui, Kiichi
影响因子:
64.8
作者:
Cuylen S;Blaukopf C;Politi AZ;Müller-Reichert T;Neumann B;Poser I;Ellenberg J;Hyman AA;Gerlich DW
通讯作者:
Gerlich DW
影响因子:
4.8
作者:
Gallo, Angelo;Lo Sterzo, Carlo;Federici, Luca
通讯作者:
Federici, Luca
DOI:
10.1073/pnas.1509317112
发表时间:
2015-09-22
影响因子:
11.1
作者:
Berry, Joel;Weber, Stephanie C.;Brangwynne, Clifford P.
通讯作者:
Brangwynne, Clifford P.
影响因子:
4.1
作者:
Amin, Mohammed Abdullahel;Matsunaga, Sachihiro;Fukui, Kiichi
通讯作者:
Fukui, Kiichi