Evolution of Chromatin

Research Focus

In eukaryotes, DNA is wrapped around nucleosomes. Nucleosomes consist of proteins called histones and help organize DNA into functional units, they are thus critical for all cellular processes that affect DNA. Nucleosome properties are modulated by their composition in different variants of histone proteins. In addition, chemical modifications of histones regulate nucleosome properties. These modifications are deposited, erased and bound by different protein complexes that form chromatin. Chromatin is the recipient of the epigenetic code that influences how the transcription and DNA repair machineries operate. Because chromatin is present is all eukaryotes, it must have evolved both in prokaryotes and during eukaryogenesis.

The Berger lab investigates the evolution of chromatin and its impacts on processes such as transcription, DNA repair and meiosis. Genetics, genomics, and biochemical analyses are combined with synthetic strategies to study chromatin in models of Archaeplastida, yeast, E. coli and Asgard Archeae.

News from the Berger Lab

 

Selected Publications

Osakabe A, Takizawa Y, Horikhosi N, et al. (2024) Molecular and structural basis of the heterochromatin-specific chromatin remodeling activity by Arabidopsis DDM1. Nat Commun 15(1):5187 preprint bioRxiv:2023.07.10.548306.

Harvey ZH, Stevens KM, Warnecke T, et al. (2024) H2A.Z and elongation factor Spt6 form an ancient bridge shaping transcription in eukaryotes. bioRxiv:2024.05.10.593535.

Lorkovic ZJ, Klingenbrunner M, Cho CH, et al. (2024) Identification of plants' functional counterpart of the metazoan mediator of DNA Damage checkpoint 1. EMBO Rep 25(4):1936-61 preprint bioRxiv:2023.05.19.541430.

Murphy PJ and Berger F (2023) The chromatin source-sink hypothesis: a shared mode of chromatin-mediated regulations. Development 150(21):dev201989.

Hisanaga T, Romani F, Wu S, et al. (2023) The Polycomb repressive complex 2 deposits H3K27me3 and represses transposable elements in a broad range of eukaryotes. Curr Biol 33(20):4367-80 preprint bioRxiv:2022.10.24.513474.

Jamge B, Lorkovic ZJ, Axelsson E, et al. (2023) Histone variants shape chromatin states in Arabidopsis. Elife 12:RP87714 preprint bioRxiv:2023.03.08.531698.

Montgomery SA, Hisanaga T, Wang N, et al. (2022) Polycomb-mediated repression of paternal chromosomes maintains haploid dosage in diploid embryos of Marchantia.  Elife 11:e79258 preprint bioRxiv:2022.02.04.477531.

Osakabe A, Jamge B, Axelsson E, et al. (2021) The chromatin remodeler DDM1 prevents transposon mobility through deposition of histone variant H2A.W. Nat Cell Biol 23(4):391-400.

 

Group members

Group Leader

Bioinformaticians

Senior Research Assistants

Research Assistants

Interns and Master Students