Tuning and Controlling Gene Expression Noise in Synthetic Gene Networks

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Tuning and Controlling Gene Expression Noise in Synthetic Gene Networks

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Title: Tuning and Controlling Gene Expression Noise in Synthetic Gene Networks
Author: Adams, Rhys M.; Balázsi, Gábor; Murphy, Kevin Francis; Wang, Xiao; Collins, James J.

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Citation: Murphy, Kevin F., Rhys M. Adams, Xiao Wang, Gábor Balázsi, and James J. Collins. 2010. Tuning and controlling gene expression noise in synthetic gene networks. Nucleic Acids Research 38(8): 2712-2726.
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Abstract: Synthetic gene networks can be used to control gene expression and cellular phenotypes in a variety of applications. In many instances, however, such networks can behave unreliably due to gene expression noise. Accordingly, there is a need to develop systematic means to tune gene expression noise, so that it can be suppressed in some cases and harnessed in others, e.g. in cellular differentiation to create population-wide heterogeneity. Here, we present a method for controlling noise in synthetic eukaryotic gene expression systems, utilizing reduction of noise levels by TATA box mutations and noise propagation in transcriptional cascades. Specifically, we introduce TATA box mutations into promoters driving TetR expression and show that these mutations can be used to effectively tune the noise of a target gene while decoupling it from the mean, with negligible effects on the dynamic range and basal expression. We apply mathematical and computational modeling to explain the experimentally observed effects of TATA box mutations. This work, which highlights some important aspects of noise propagation in gene regulatory cascades, has practical implications for implementing gene expression control in synthetic gene networks.
Published Version: doi:10.1093/nar/gkq091
Other Sources: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2860118/pdf/
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:4874775
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