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Generation of Single-Cell Transcript Variability by Repression
Gene expression levels vary greatly within similar cells, even within clonal cell populations [1]. These spontaneous expression differences underlie cell fate diversity in both differentiation and disease [2]. The mechanisms responsible for generating expression variability are poorly understood. Us...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Cell Press
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5483230/ https://www.ncbi.nlm.nih.gov/pubmed/28602650 http://dx.doi.org/10.1016/j.cub.2017.05.028 |
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author | Antolović, Vlatka Miermont, Agnes Corrigan, Adam M. Chubb, Jonathan R. |
author_facet | Antolović, Vlatka Miermont, Agnes Corrigan, Adam M. Chubb, Jonathan R. |
author_sort | Antolović, Vlatka |
collection | PubMed |
description | Gene expression levels vary greatly within similar cells, even within clonal cell populations [1]. These spontaneous expression differences underlie cell fate diversity in both differentiation and disease [2]. The mechanisms responsible for generating expression variability are poorly understood. Using single-cell transcriptomics, we show that transcript variability emerging during Dictyostelium differentiation is driven predominantly by repression rather than activation. The increased variability of repressed genes was observed over a broad range of expression levels, indicating that variability is actively imposed and not a passive statistical effect of the reduced numbers of molecules accompanying repression. These findings can be explained by a simple model of transcript production, with expression controlled by the frequency, rather than the magnitude, of transcriptional firing events. Our study reveals that the generation of differences between cells can be a direct consequence of the basic mechanisms of transcriptional regulation. |
format | Online Article Text |
id | pubmed-5483230 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Cell Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-54832302017-06-29 Generation of Single-Cell Transcript Variability by Repression Antolović, Vlatka Miermont, Agnes Corrigan, Adam M. Chubb, Jonathan R. Curr Biol Report Gene expression levels vary greatly within similar cells, even within clonal cell populations [1]. These spontaneous expression differences underlie cell fate diversity in both differentiation and disease [2]. The mechanisms responsible for generating expression variability are poorly understood. Using single-cell transcriptomics, we show that transcript variability emerging during Dictyostelium differentiation is driven predominantly by repression rather than activation. The increased variability of repressed genes was observed over a broad range of expression levels, indicating that variability is actively imposed and not a passive statistical effect of the reduced numbers of molecules accompanying repression. These findings can be explained by a simple model of transcript production, with expression controlled by the frequency, rather than the magnitude, of transcriptional firing events. Our study reveals that the generation of differences between cells can be a direct consequence of the basic mechanisms of transcriptional regulation. Cell Press 2017-06-19 /pmc/articles/PMC5483230/ /pubmed/28602650 http://dx.doi.org/10.1016/j.cub.2017.05.028 Text en © 2017 The Author(s) http://creativecommons.org/licenses/by/4.0/ This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Report Antolović, Vlatka Miermont, Agnes Corrigan, Adam M. Chubb, Jonathan R. Generation of Single-Cell Transcript Variability by Repression |
title | Generation of Single-Cell Transcript Variability by Repression |
title_full | Generation of Single-Cell Transcript Variability by Repression |
title_fullStr | Generation of Single-Cell Transcript Variability by Repression |
title_full_unstemmed | Generation of Single-Cell Transcript Variability by Repression |
title_short | Generation of Single-Cell Transcript Variability by Repression |
title_sort | generation of single-cell transcript variability by repression |
topic | Report |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5483230/ https://www.ncbi.nlm.nih.gov/pubmed/28602650 http://dx.doi.org/10.1016/j.cub.2017.05.028 |
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