Compositional adaptability in NPM1-SURF6 scaffolding networks enabled by dynamic switching of phase separation mechanisms.
Compositional adaptability in NPM1-SURF6 scaffolding networks enabled by dynamic switching of phase separation mechanisms.
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DOI:
10.1038/s41467-018-07530-1
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发表时间:
2018-11-29
影响因子:
16.6
通讯作者:
Kriwacki RW
中科院分区:
文献类型:
--
作者:
Ferrolino MC;Mitrea DM;Michael JR;Kriwacki RW
The nucleolus, the site for ribosome biogenesis contains hundreds of proteins and several types of RNA. The functions of many non-ribosomal nucleolar proteins are poorly understood, including Surfeit locus protein 6 (SURF6), an essential disordered protein with roles in ribosome biogenesis and cell proliferation. SURF6 co-localizes with Nucleophosmin (NPM1), a highly abundant protein that mediates the liquid-like features of the granular component region of the nucleolus through phase separation. Here, we show that electrostatically-driven interactions between disordered regions of NPM1 and SURF6 drive liquid-liquid phase separation. We demonstrate that co-existing heterotypic (NPM1-SURF6) and homotypic (NPM1-NPM1) scaffolding interactions within NPM1-SURF6 liquid-phase droplets dynamically and seamlessly interconvert in response to variations in molecular crowding and protein concentrations. We propose a mechanism wherein NPM1-dependent nucleolar scaffolds are modulated by non-ribosomal proteins through active rearrangements of interaction networks that can possibly contribute to the directionality of ribosomal biogenesis within the liquid-like nucleolus. The nucleolus is a membrane-less organelle and both Nucleophosmin (NPM1) and Surfeit locus protein 6 (SURF6) are abundant proteins within the nucleolus. Here the authors employ biophysical methods to study the properties of NPM1-S6N droplets and provide insights into the role of SURF6 in maintaining and modulating the liquid-like structure of the nucleolus.
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DOI:
10.1126/science.aan6398
发表时间:
2018-02-09
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Hughes MP;Sawaya MR;Boyer DR;Goldschmidt L;Rodriguez JA;Cascio D;Chong L;Gonen T;Eisenberg DS
通讯作者:
Eisenberg DS
影响因子:
16.6
作者:
Mitrea DM;Cika JA;Stanley CB;Nourse A;Onuchic PL;Banerjee PR;Phillips AH;Park CG;Deniz AA;Kriwacki RW
通讯作者:
Kriwacki RW
影响因子:
16.6
作者:
Ambadipudi S;Biernat J;Riedel D;Mandelkow E;Zweckstetter M
通讯作者:
Zweckstetter M
影响因子:
9.2
作者:
Andersen, JS;Lyon, CE;Lamond, AI
通讯作者:
Lamond, AI
影响因子:
21.3
作者:
Colombo, E;Marine, JC;Pelicci, PG
通讯作者:
Pelicci, PG