Epigenetic and conventional regulation is distributed among activat= allowing tuning of population-level heterogeneity in its expression
Epigenetic switches encode their state information either locally, often via covalent modification of DNA or histones, or globally, usually in the level of a trans-regulatory factor. Here we examine how the regulation of cis-encoded epigenetic switches controls the extent of heterogeneity in gene...
| Main Authors: | , , |
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| Format: | Article |
| Language: | en_US |
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Public Library of Science
2010
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| Online Access: | http://hdl.handle.net/1721.1/54763 |
| _version_ | 1811094600769601536 |
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| author | Octavio, Leah M. Gedeon, Kamil S. Maheshri, Narendra |
| author2 | Massachusetts Institute of Technology. Department of Biology |
| author_facet | Massachusetts Institute of Technology. Department of Biology Octavio, Leah M. Gedeon, Kamil S. Maheshri, Narendra |
| author_sort | Octavio, Leah M. |
| collection | MIT |
| description | Epigenetic switches encode their state information either locally, often via covalent modification of DNA or histones, or
globally, usually in the level of a trans-regulatory factor. Here we examine how the regulation of cis-encoded epigenetic
switches controls the extent of heterogeneity in gene expression, which is ultimately tied to phenotypic diversity in a
population. We show that two copies of the FLO11 locus in Saccharomyces cerevisiae switch between a silenced and
competent promoter state in a random and independent fashion, implying that the molecular event leading to the
transition occurs locally at the promoter, in cis. We further quantify the effect of trans regulators both on the slow
epigenetic transitions between a silenced and competent promoter state and on the fast promoter transitions associated
with conventional regulation of FLO11. We find different classes of regulators affect epigenetic, conventional, or both forms
of regulation. Distributing kinetic control of epigenetic silencing and conventional gene activation offers cells flexibility in
shaping the distribution of gene expression and phenotype within a population. |
| first_indexed | 2024-09-23T16:02:40Z |
| format | Article |
| id | mit-1721.1/54763 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T16:02:40Z |
| publishDate | 2010 |
| publisher | Public Library of Science |
| record_format | dspace |
| spelling | mit-1721.1/547632022-09-29T17:48:54Z Epigenetic and conventional regulation is distributed among activat= allowing tuning of population-level heterogeneity in its expression Octavio, Leah M. Gedeon, Kamil S. Maheshri, Narendra Massachusetts Institute of Technology. Department of Biology Massachusetts Institute of Technology. Department of Chemical Engineering Maheshri, Narendra Octavio, Leah M. Gedeon, Kamil S. Maheshri, Narendra Epigenetic switches encode their state information either locally, often via covalent modification of DNA or histones, or globally, usually in the level of a trans-regulatory factor. Here we examine how the regulation of cis-encoded epigenetic switches controls the extent of heterogeneity in gene expression, which is ultimately tied to phenotypic diversity in a population. We show that two copies of the FLO11 locus in Saccharomyces cerevisiae switch between a silenced and competent promoter state in a random and independent fashion, implying that the molecular event leading to the transition occurs locally at the promoter, in cis. We further quantify the effect of trans regulators both on the slow epigenetic transitions between a silenced and competent promoter state and on the fast promoter transitions associated with conventional regulation of FLO11. We find different classes of regulators affect epigenetic, conventional, or both forms of regulation. Distributing kinetic control of epigenetic silencing and conventional gene activation offers cells flexibility in shaping the distribution of gene expression and phenotype within a population. 2010-05-11T20:42:17Z 2010-05-11T20:42:17Z 2009-10 2009-04 Article http://purl.org/eprint/type/JournalArticle 1553-7390 1553-7404 http://hdl.handle.net/1721.1/54763 Octavio, Leah M., Kamil Gedeon, and Narendra Maheshri. “Epigenetic and Conventional Regulation Is Distributed among Activators of FLO11 Allowing Tuning of Population-Level Heterogeneity in Its Expression.” PLoS Genet 5.10 (2009): e1000673. ©2009 Octavio et al. en_US http://dx.doi.org/10.1371/journal.pgen.1000673 PLoS Genetics Creative Commons Attribution http://creativecommons.org/licenses/by/2.5/ application/pdf Public Library of Science PLoS |
| spellingShingle | Octavio, Leah M. Gedeon, Kamil S. Maheshri, Narendra Epigenetic and conventional regulation is distributed among activat= allowing tuning of population-level heterogeneity in its expression |
| title | Epigenetic and conventional regulation is distributed among activat= allowing tuning of population-level heterogeneity in its expression |
| title_full | Epigenetic and conventional regulation is distributed among activat= allowing tuning of population-level heterogeneity in its expression |
| title_fullStr | Epigenetic and conventional regulation is distributed among activat= allowing tuning of population-level heterogeneity in its expression |
| title_full_unstemmed | Epigenetic and conventional regulation is distributed among activat= allowing tuning of population-level heterogeneity in its expression |
| title_short | Epigenetic and conventional regulation is distributed among activat= allowing tuning of population-level heterogeneity in its expression |
| title_sort | epigenetic and conventional regulation is distributed among activat allowing tuning of population level heterogeneity in its expression |
| url | http://hdl.handle.net/1721.1/54763 |
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