Polycomb Repression without Bristles: Facultative Heterochromatin and Genome Stability in Fungi.

Genes
John B RidenourMichael Freitag

Abstract

Genome integrity is essential to maintain cellular function and viability. Consequently, genome instability is frequently associated with dysfunction in cells and associated with plant, animal, and human diseases. One consequence of relaxed genome maintenance that may be less appreciated is an increased potential for rapid adaptation to changing environments in all organisms. Here, we discuss evidence for the control and function of facultative heterochromatin, which is delineated by methylation of histone H3 lysine 27 (H3K27me) in many fungi. Aside from its relatively well understood role in transcriptional repression, accumulating evidence suggests that H3K27 methylation has an important role in controlling the balance between maintenance and generation of novelty in fungal genomes. We present a working model for a minimal repressive network mediated by H3K27 methylation in fungi and outline challenges for future research.

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Citations

Oct 24, 2020·Trends in Genetics : TIG·Hiten D Madhani
Sep 28, 2021·Nucleic Acids Research·Guangfei TangYun Chen
Dec 30, 2021·ACS Synthetic Biology·Yuan YaoHaiyun Gan

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Methods Mentioned

BETA
ChIP-seq
ubiquitination
RNA-seq
acetylation
Hi-C

Software Mentioned

Hi

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