Data/hora: 01/06/2024 06:21:09

Provedor de dados: 	5	
País: 	France	
Título: 	Modelization of the regulation of protein synthesis following fertilization in sea urchin shows requirement of two processes: a destabilization of elF4E:4E-BP complex and a great stimulation of the 4E-BP-degradation mechanism, both rapamycin-sensitive	
Autores: 	Laurent, Sebastien; Richard, Adrien; Mulner-lorillon, Odile; Morales, Julia; Flament, Didier; Glippa, Virginie; Bourdon, Jeremie; Gosselin, Pauline; Siegel, Anne; Cormier, Patrick; Belle, Robert.	
Data: 	2014-05	
Ano: 	2014	
Palavras-chave: 	Translational control; Sea urchin embryos; Mechanisms of fertilization; Deterministic model; Translation simulation.	
Resumo: 	Fertilization of sea urchin eggs involves an increase in protein synthesis associated with a decrease in the amount of the translation initiation inhibitor 4E-BP A highly simple reaction model for the regulation of protein synthesis was built and was used to simulate the physiological changes in the total 4E-BP amount observed during time after fertilization. Our study evidenced that two changes occurring at fertilization are necessary to fit with experimental data. The first change was an 8-fold increase in the dissociation parameter (koffi) of the elF4E:4E-BP complex. The second was an important 32.5-fold activation of the degradation mechanism of the protein 4E-BP Additionally, the changes in both processes should occur in 5 min time interval post-fertilization. To validate the model, we checked that the kinetic of the predicted 4.2-fold increase of elF4E:e1F4G complex concentration at fertilization matched the increase of protein synthesis experimentally observed after fertilization (6.6-fold, SD = 2.3, n = 8). The minimal model was also used to simulate changes observed after fertilization in the presence of rapamycin, a FRAP/mTOR inhibitor. The model showed that the elF4E:4E-BP complex destabilization was impacted and surprisingly, that the mechanism of 4E-BP degradation was also strongly affected, therefore suggesting that both processes are controlled by the protein kinase FRAP/mTOR.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/00382/49341/49731.pdf

DOI:10.3389/fgene.2014.00117

http://archimer.ifremer.fr/doc/00382/49341/	
Editor: 	Frontiers Media Sa	
Formato: 	application/pdf	
Fonte: 	Frontiers In Genetics (1664-8021) (Frontiers Media Sa), 2014-05 , Vol. 5 , N. 117 , P. 1-10	
Fonte: 	2014 Laurent, Richard, Mulner-Lorillon, Morales, Flament, Glippa, Bourdon, Gosselin, Siegel, Cormier and Bellé. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction ...

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