Poised RNA Polymerase II changes over developmental time and prepares genes for future expression
Ontology highlight
ABSTRACT:
ORGANISM(S): Mus musculus
SUBMITTER: Jeff Johnston
PROVIDER: E-GEOD-34304 | biostudies-arrayexpress |
REPOSITORIES: biostudies-arrayexpress
Publications
Poised RNA polymerase II changes over developmental time and prepares genes for future expression.
Gaertner Bjoern B Johnston Jeff J Chen Kai K Wallaschek Nina N Paulson Ariel A Garruss Alexander S AS Gaudenz Karin K De Kumar Bony B Krumlauf Robb R Zeitlinger Julia J
Cell reports 20121220 6
Poised RNA polymerase II (Pol II) is predominantly found at developmental control genes and is thought to allow their rapid and synchronous induction in response to extracellular signals. How the recruitment of poised RNA Pol II is regulated during development is not known. By isolating muscle tissue from Drosophila embryos at five stages of differentiation, we show that the recruitment of poised Pol II occurs at many genes de novo and this makes them permissive for future gene expression. A com ...[more]
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Project description:Poised RNA polymerase II is predominantly found at developmental control genes and is thought to allow their rapid and synchronous induction in response to extracellular signals. How the recruitment of poised RNA Pol II is regulated during development is not known. By isolating muscle tissue from Drosophila embryos at five stages of differentiation, we show that the recruitment of poised Pol II occurs at many genes de novo and this makes them permissive for future gene expression. When compared to other tissues, these changes are stage-specific and not tissue-specific. In contrast, Polycomb group repression is tissue-specific and in combination with Pol II (the balanced state) marks genes with highly dynamic expression. This suggests that poised Pol II is temporally regulated and is held in check in a tissue-specific fashion. We compare our data to mammalian embryonic stem cells and discuss a framework for predicting developmental programs based on chromatin state. ChIP-seq for Pol II, H3K4me3 and H3K27me3 in various Drosophila embryos and tissues
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Project description:Poised RNA polymerase II is predominantly found at developmental control genes and is thought to allow their rapid and synchronous induction in response to extracellular signals. How the recruitment of poised RNA Pol II is regulated during development is not known. By isolating muscle tissue from Drosophila embryos at five stages of differentiation, we show that the recruitment of poised Pol II occurs at many genes de novo and this makes them permissive for future gene expression. When compared to other tissues, these changes are stage-specific and not tissue-specific. In contrast, Polycomb group repression is tissue-specific and in combination with Pol II (the balanced state) marks genes with highly dynamic expression. This suggests that poised Pol II is temporally regulated and is held in check in a tissue-specific fashion. We compare our data to mammalian embryonic stem cells and discuss a framework for predicting developmental programs based on chromatin state. MNase-seq data for examining nucleosome occupancy in specific Drosophila tissues during development
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