A single N-terminal phosphomimic disrupts TDP-43 polymerization, phase separation, and RNA splicing.
A single N-terminal phosphomimic disrupts TDP-43 polymerization, phase separation, and RNA splicing.
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DOI:
10.15252/embj.201797452
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发表时间:
2018-03-01
期刊:
影响因子:
--
通讯作者:
Fawzi NL
中科院分区:
文献类型:
--
作者:
Wang A;Conicella AE;Schmidt HB;Martin EW;Rhoads SN;Reeb AN;Nourse A;Ramirez Montero D;Ryan VH;Rohatgi R;Shewmaker F;Naik MT;Mittag T;Ayala YM;Fawzi NL
TDP‐43 is an RNA‐binding protein active in splicing that concentrates into membraneless ribonucleoprotein granules and forms aggregates in amyotrophic lateral sclerosis (ALS) and Alzheimer's disease. Although best known for its predominantly disordered C‐terminal domain which mediates ALS inclusions, TDP‐43 has a globular N‐terminal domain (NTD). Here, we show that TDP‐43 NTD assembles into head‐to‐tail linear chains and that phosphomimetic substitution at S48 disrupts TDP‐43 polymeric assembly, discourages liquid–liquid phase separation (LLPS) in vitro, fluidizes liquid–liquid phase separated nuclear TDP‐43 reporter constructs in cells, and disrupts RNA splicing activity. Finally, we present the solution NMR structure of a head‐to‐tail NTD dimer comprised of two engineered variants that allow saturation of the native polymerization interface while disrupting higher‐order polymerization. These data provide structural detail for the established mechanistic role of the well‐folded TDP‐43 NTD in splicing and link this function to LLPS. In addition, the fusion‐tag solubilized, recombinant form of TDP‐43 full‐length protein developed here will enable future phase separation and in vitro biochemical assays on TDP‐43 function and interactions that have been hampered in the past by TDP‐43 aggregation.
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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:
16.2
作者:
Alami NH;Smith RB;Carrasco MA;Williams LA;Winborn CS;Han SSW;Kiskinis E;Winborn B;Freibaum BD;Kanagaraj A;Clare AJ;Badders NM;Bilican B;Chaum E;Chandran S;Shaw CE;Eggan KC;Maniatis T;Taylor JP
通讯作者:
Taylor JP
影响因子:
14.9
作者:
Hornbeck PV;Zhang B;Murray B;Kornhauser JM;Latham V;Skrzypek E
通讯作者:
Skrzypek E
DOI:
10.1016/j.bbrc.2012.07.071
发表时间:
2012-08-24
影响因子:
3.1
作者:
Chang, Chung-ke;Wu, Tzong-Huah;Huang, Joseph Jen-Tse
通讯作者:
Huang, Joseph Jen-Tse
影响因子:
2.7
作者:
DELAGLIO, F;GRZESIEK, S;BAX, A
通讯作者:
BAX, A