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Genome-wide mapping of a repressive H3K36me2 reader during growth mycelia in the Magnaporthe oryzae

ABSTRACT: A putative EAF3/MRG15 ortholog N1617, containing chromo and MRG domain, is a partner of Ash1 in Magnaporthe oryzae

ORGANISM(S): Pyricularia oryzae

PROVIDER: GSE246678 | GEO | 2023/11/29

REPOSITORIES: GEO

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Next Generation Sequencing of a repressive H3K36me2 reader during growth mycelia in the Magnaporthe oryzae

Project description:A putative EAF3/MRG15 ortholog N1617, containing chromo and MRG domain, is a partner of Ash1 in Magnaporthe oryzae

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Mrg15 allosterically activates Ash1’s H3K36 methyltransferase activity and facilitates Ash1’s trithorax group protein function in Drosophila

Project description:Ash1 is a classic Trithorax group protein possessing an H3K36-specific histone methyltransferase activity. Ash1 plays a critical role in antagonizing Polycomb silencing and its loss-of-function mutations lead to inactivation of certain Hox genes and homeotic transformation. Here, we report the purification of Ash1 complex with the identification of two novel subunits, Mrg15 and Nurf55. Interestingly, Mrg15 stimulates the enzymatic activity of Ash1 in vitro, and such stimulation is independent of the chromo domain of Mrg15. In vivo, Mrg15 is recruited by Ash1 to their common target genes and Mrg15 is essential for the proper deposition of H3K36me2 at these regions.

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Repressive H3K36me2 reader during growth mycelia in the Magnaporthe oryzae

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Project description:Di- and tri-methylation of lysine 36 on histone H3 (H3K36me2/3) are catalyzed by SET2 histone methyltransferase which play an important role in transcriptional elongation.we reveal a novel mechanism by which H3K36me2 and H3K36me3 associates with opposite transcriptional activity and Ash1 is required for the normal distribution of facultative heterochromatic modifications and stable maintenance of transcriptional silencing in eukaryotes.

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