Translational control of lipogenic enzymes in the cell cycle of synchronous, growing yeast cells.
EMBO J
; 36(4): 487-502, 2017 02 15.
Article
em En
| MEDLINE
| ID: mdl-28057705
ABSTRACT
Translational control during cell division determines when cells start a new cell cycle, how fast they complete it, the number of successive divisions, and how cells coordinate proliferation with available nutrients. The translational efficiencies of mRNAs in cells progressing synchronously through the mitotic cell cycle, while preserving the coupling of cell division with cell growth, remain uninvestigated. We now report comprehensive ribosome profiling of a yeast cell size series from the time of cell birth, to identify mRNAs under periodic translational control. The data reveal coordinate translational activation of mRNAs encoding lipogenic enzymes late in the cell cycle including Acc1p, the rate-limiting enzyme acetyl-CoA carboxylase. An upstream open reading frame (uORF) confers the translational control of ACC1 and adjusts Acc1p protein levels in different nutrients. The ACC1 uORF is relevant for cell division because its ablation delays cell cycle progression, reduces cell size, and suppresses the replicative longevity of cells lacking the Sch9p protein kinase regulator of ribosome biogenesis. These findings establish an unexpected relationship between lipogenesis and protein synthesis in mitotic cell divisions.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Acetil-CoA Carboxilase
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Biossíntese de Proteínas
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Leveduras
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Regulação Fúngica da Expressão Gênica
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Mitose
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
EMBO J
Ano de publicação:
2017
Tipo de documento:
Article
País de afiliação:
Estados Unidos