We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Conserved Cis-Regulatory Modules Control Robustness in Msx1 Expression at Single-Cell Resolution.
- Authors
Vance, Keith W.; Woodcock, Dan J.; Reid, John E.; Bretschneider, Till; Ott, Sascha; Koentges, Georgy
- Abstract
The process of transcription is highly stochastic leading to cell-to-cell variations and noise in gene expression levels. However, key essential genes have to be precisely expressed at the correct amount and time to ensure proper cellular development and function. Studies in yeast and bacterial systems have shown that gene expression noise decreases as mean expression levels increase, a relationship that is controlled by promoterDNAsequence. However, the function of distal cis-regulatorymodules (CRMs), an evolutionary novelty of metazoans, in controlling transcriptional robustness and variability is poorly understood. In this study, we used live cell imaging of transfected reporters combined with a mathematical modelling and statistical inference scheme to quantify the function of conserved Msx1 CRMs and promoters in modulating single-cell real-time transcription rates in C2C12 mouse myoblasts. The results show that the mean expression–noise relationship is solely promoter controlled for this key pluripotency regulator. In addition, we demonstrate that CRMs modulate single-cell basal promoter rate distributions in a graded manner across a population of cells. This extends the rheostatic model of CRM action to provide amore detailed understanding of CRMfunction at single-cell resolution.We also identify anovelCRMtranscriptionalfilter function that acts to reduce intracellular variability intranscription rates andshowthat this can be phylogenetically separable from rate modulating CRM activities. These results are important for understanding how the expression of key vertebrate developmental transcription factors is precisely controlled both within and between individual cells.
- Publication
Genome Biology & Evolution, 2015, Vol 7, Issue 9, p2762
- ISSN
1759-6653
- Publication type
Article
- DOI
10.1093/gbe/evv179