Phase-separating pyrenoid proteins form complexes in the dilute phase.
Phase-separating pyrenoid proteins form complexes in the dilute phase.
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DOI:
10.1038/s42003-022-04373-x
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发表时间:
2023-01-07
影响因子:
5.9
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中科院分区:
文献类型:
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While most studies of biomolecular phase separation have focused on the condensed phase, relatively little is known about the dilute phase. Theory suggests that stable complexes form in the dilute phase of two-component phase-separating systems, impacting phase separation; however, these complexes have not been interrogated experimentally. We show that such complexes indeed exist, using an in vitro reconstitution system of a phase-separated organelle, the algal pyrenoid, consisting of purified proteins Rubisco and EPYC1. Applying fluorescence correlation spectroscopy (FCS) to measure diffusion coefficients, we found that complexes form in the dilute phase with or without condensates present. The majority of these complexes contain exactly one Rubisco molecule. Additionally, we developed a simple analytical model which recapitulates experimental findings and provides molecular insights into the dilute phase organization. Thus, our results demonstrate the existence of protein complexes in the dilute phase, which could play important roles in the stability, dynamics, and regulation of condensates. Stable hetero-complexes exist in the dilute phase of phase-separating algal pyrenoid proteins in vitro.
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DOI:
10.1073/pnas.1706197114
发表时间:
2017-09-26
影响因子:
11.1
作者:
Brady, Jacob P.;Farber, Patrick J.;Kay, Lewis E.
通讯作者:
Kay, Lewis E.
影响因子:
4.3
作者:
Choi, Jeong-Mo;Dar, Furqan;Pappu, Rohit, V
通讯作者:
Pappu, Rohit, V
影响因子:
--
作者:
LUNBECK, RJ;BOERBOOM, AJH
通讯作者:
BOERBOOM, AJH
影响因子:
64.5
作者:
Feric M;Vaidya N;Harmon TS;Mitrea DM;Zhu L;Richardson TM;Kriwacki RW;Pappu RV;Brangwynne CP
通讯作者:
Brangwynne CP
影响因子:
64.8
作者:
Li, Pilong;Banjade, Sudeep;Cheng, Hui-Chun;Kim, Soyeon;Chen, Baoyu;Guo, Liang;Llaguno, Marc;Hollingsworth, Javoris V.;King, David S.;Banani, Salman F.;Russo, Paul S.;Jiang, Qiu-Xing;Nixon, B. Tracy;Rosen, Michael K.
通讯作者:
Rosen, Michael K.