SunRiSE - measuring translation elongation at single-cell resolution by means of flow cytometry.
J Cell Sci
; 131(10)2018 05 31.
Article
em En
| MEDLINE
| ID: mdl-29700204
ABSTRACT
The rate at which ribosomes translate mRNAs regulates protein expression by controlling co-translational protein folding and mRNA stability. Many factors regulate translation elongation, including tRNA levels, codon usage and phosphorylation of eukaryotic elongation factor 2 (eEF2). Current methods to measure translation elongation lack single-cell resolution, require expression of multiple transgenes and have never been successfully applied ex vivo Here, we show, by using a combination of puromycilation detection and flow cytometry (a method we call 'SunRiSE'), that translation elongation can be measured accurately in primary cells in pure or heterogenous populations isolated from blood or tissues. This method allows for the simultaneous monitoring of multiple parameters, such as mTOR or S6K1/2 signaling activity, the cell cycle stage and phosphorylation of translation factors in single cells, without elaborated, costly and lengthy purification procedures. We took advantage of SunRiSE to demonstrate that, in mouse embryonic fibroblasts, eEF2 phosphorylation by eEF2 kinase (eEF2K) mostly affects translation engagement, but has a surprisingly small effect on elongation, except after proteotoxic stress induction.This article has an associated First Person interview with the first author of the paper.
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Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Elongação Traducional da Cadeia Peptídica
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Análise de Célula Única
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Fibroblastos
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Citometria de Fluxo
Tipo de estudo:
Evaluation_studies
Limite:
Animals
Idioma:
En
Revista:
J Cell Sci
Ano de publicação:
2018
Tipo de documento:
Article