TY  - BOOK
AU  - Inagaki,S.
AU  - Miura-Kamio,A.
AU  - Nakamura,Y.
AU  - Lu,F.
AU  - Cui,X.
AU  - Cao,X.
AU  - Kimura,H.
AU  - Kimura,H.
AU  - Kakutani,T.
TI  - Autocatalytic differentiation of epigenetic modifications within the Arabidopsis genome
KW  - CHROMATIN
KW  - DNA METHYLATION
KW  - HISTONE DEMETHYLASE
KW  - IBM1
KW  - TRANSPOSON
N2  - In diverse eukaryotes, constitutively silent sequences, such as transposons and repeats, are marked by methylation at histone H3 lysine 9 (H3K9me). Although selective H3K9me is critical for maintaining genome integrity, mechanisms to exclude H3K9me from active genes remain largely unexplored. Here, we show in Arabidopsis that the exclusion depends on a histone demethylase gene, IBM1 (increase in BONSAI methylation). Loss-of-function ibm1 mutation results in ectopic H3K9me and non-CG methylation in thousands of genes. The ibm1-induced genic H3K9me depends on both histone methylase KYP/SUVH4 and DNA methylase CMT3, suggesting interdependence of two epigenetic marks-H3K9me and non-CG methylation. notably, IBM1 enhances loss of H3K9me in transcriptionally de-repressed sequences. Furthermore, disruption of transcription in genes induces ectopic non-CG methylation, which mimics the loss of IBM1 function. We propose that active chromatin is stabilized by an autocatalytic loop of transcription and H3K9 demethylation. This process counteracts a similarly autocatalytic accumulation of silent epigenetic marks, H3K9me and non-CG methylation
UR  - https://drive.google.com/file/d/1zIs9SfQAtE4UpkuX9D_pcSskcGX3AUYI/view?usp=drivesdk
ER  -