DNA Binding by an Intrinsically Disordered Elastin-like Polypeptide for Assembly of Phase Separated Nucleoprotein Coacervates
DNA Binding by an Intrinsically Disordered Elastin-like Polypeptide for Assembly of Phase Separated Nucleoprotein Coacervates
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本质无序的弹性蛋白样多肽与 DNA 结合,用于组装相分离的核蛋白凝聚层
DOI:
10.1021/acs.iecr.1c02823
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发表时间:
2021
影响因子:
4.2
通讯作者:
Carroll, Nick J.
中科院分区:
文献类型:
--
作者:
Pérez, Telmo Díez;Quintana, Adam;De Lora, Jacqueline A.;Shreve, Andrew P.;López, Gabriel P.;Carroll, Nick J.
The formation of condensed phase nucleoprotein assemblies, such as membraneless organelles (MLOs), that contribute to gene regulation and signaling within the cell is garnering widespread attention. A critical technical challenge is understanding how interactions between intrinsically disordered protein (IDP) and nucleic acid molecular components affect liquid–liquid phase separation (LLPS) into nucleoprotein condensates. To better understand the physics of LLPS that drive the formation of biomolecular condensates (known as coacervates), we investigate a model IDP system using a cationic elastin-like polypeptide (ELP), “E3”, that is engineered to phase separate and bind DNA upon coacervate formation. Using mean field Flory–Huggins (FH) theory, we create ternary phase diagrams to quantify DNA component partitioning within discrete protein- and solvent-rich phases across a range of salt and E3 compositions. We suggest a modified FH theory that combines canonical FH interaction parameters with an approximation of the Debye–Hückel theory to predict the strength of E3–DNA interactions and partitioning with a variable salt concentration. Finally, we establish a simple two-step DNA solution separation/purification assay to highlight the potential utility of our system. This model LLPS biopolymer platform represents an important chemical engineering-based contribution to synthetic biology and DNA technologies, with possible implications for origin of life discussions.
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影响因子:
21.8
作者:
Wei MT;Elbaum-Garfinkle S;Holehouse AS;Chen CC;Feric M;Arnold CB;Priestley RD;Pappu RV;Brangwynne CP
通讯作者:
Brangwynne CP
影响因子:
21.8
作者:
Simon JR;Carroll NJ;Rubinstein M;Chilkoti A;López GP
通讯作者:
López GP
影响因子:
19
作者:
Protter DSW;Parker R
通讯作者:
Parker R
DOI:
10.1073/pnas.1504822112
发表时间:
2015-06-09
影响因子:
11.1
作者:
Elbaum-Garfinkle, Shana;Kim, Younghoon;Brangwynne, Clifford P.
通讯作者:
Brangwynne, Clifford P.
影响因子:
6.2
作者:
MacKay, J. Andrew;Callahan, Daniel J.;FitzGerald, Kelly N.;Chilkoti, Ashutosh
通讯作者:
Chilkoti, Ashutosh