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A Prion Epigenetic Switch Establishes an Active Chromatin State by Harvey, Zachary H.; Chakravarty, Anupam K.; Futia, Raymond A.; Jarosz, Daniel F. is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

What is A Prion Epigenetic Switch Establishes an Active Chromatin State about?

Covalent modifications to histones are essential for development, establishing distinct and functional chromatin domains from a common genetic sequence. Whereas repressed chromatin is robustly inherited, no mechanism that facilitates inheritance of an activated domain has been described. Here, we report that the Set3C histone deacetylase scaffold Snt1 can act as a prion that drives the emergence and transgenerational inheritance of an activated chromatin state. This prion, which we term [ESI] for expressed sub-telomeric information, is triggered by transient Snt1 phosphorylation upon cell cycle arrest. Once engaged, the prion reshapes the activity of Snt1 and the Set3C complex, recruiting RNA pol II and interfering with Rap1 binding to activate genes in otherwise repressed sub-telomeric domains. This transcriptional state confers broad resistance to environmental stress, including antifungal drugs. Altogether, our results establish a robust means by which a prion can facilitate inheritance of an activated chromatin state to provide adaptive benefit.

Who reads A Prion Epigenetic Switch Establishes an Active Chromatin State?

Author

Harvey, Zachary H.; Chakravarty, Anupam K.; Futia, Raymond A.; Jarosz, Daniel F.

Publisher

Elsevier Science; Elsevier ; Cell Press; Elsevier BV; Research Square (ISSN 0092-8674)

Published

2020

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)