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Transcription profiling by tiling array of yeast undergoing a series of carbon source shifts to discern how Set3C affects gene expression

ABSTRACT: Set3 complex (Set3C) binds histone H3 dimethylated at lysine 4 (H3K4me2) to mediate deacetylation of histones in 5Õ transcribed regions. To discern how Set3C affects gene expression, genome-wide transcription was analyzed in yeast undergoing a series of carbon source shifts. Deleting SET3 primarily caused changes during transition periods, as genes were induced or repressed. Surprisingly, a majority of Set3-affected genes are overlapped by non-coding RNA (ncRNA) transcription. Many Set3-repressed genes have H3K4me2 instead of me3 over promoter regions, due either to reduced H3K4me3 or ncRNA transcription from distal or anti-sense promoters. The resulting deacetylation by Set3C slows gene induction. Set3C represses internal cryptic promoters, but in different regions of genes than the Set2/Rpd3S pathway. Finally, Set3C stimulates some genes by repressing an overlapping antagonistic anti-sense transcript. These results suggest that Set3C and overlapping non-coding transcription can cooperate to fine tune the response kinetics of individual genes.

ORGANISM(S): Saccharomyces cerevisiae

SUBMITTER: Zhenyu Xu

PROVIDER: E-MTAB-1250 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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