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Genome-wide distribution of chromatin accessibility and transcriptome of Set2-deficient Drosophila photoreceptor neurons

ABSTRACT: Genome-wide distribution of chromatin accessibility and transcriptome of Set2-deficient Drosophila photoreceptor neurons

PROVIDER: PRJNA834097 | ENA |

REPOSITORIES: ENA

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Genome-wide distribution of chromatin accessibility and transcriptome of Set2-deficient Drosophila photoreceptor neurons

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set2 buratowski lab

Project description:H3K36 methylation by Set2 targets Rpd3S histone deacetylase to 3Ã¢ÂÂ transcribed regions, repressing internal cryptic promoters and slowing elongation. To further explore the function of this pathway, global transcription was analyzed in yeast experiencing a series of carbon source shifts. Many previously unreported cryptic ncRNAs are induced by specific carbon sources, showing that cryptic promoters can be environmentally regulated. Also, approximately 230 mRNA genes show altered induction or repression upon SET2 deletion. A majority of Set2-repressed genes have overlapping lncRNA transcription. At these promoters, H3K36me3 and deacetylation by Rpd3S leads to slower or reduced induction. Unexpectedly, Set2 derepresses 159 genes, apparently by mediating a balance between Rpd3S and Rpd3L. Therefore, in addition to repression of cryptic transcription, H3K36 methylation maintains optimal expression dynamics of many mRNAs.

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