Work

Epigenetic countermarks in mitotic chromosome condensation

Year: 2017

Type: article

Abstract: Mitosis in metazoans is characterized by abundant phosphorylation of histone H3 and involves the recruitment of condensin complexes to chromatin. The relationship between the 2 phenomena and their respective contributions to chromosome condensation in vivo remain poorly understood. Recent studies have shown that H3T3 phosphorylation decreases binding of histone readers to methylated H3K4 in vitro and is essential to displace the corresponding proteins from mitotic chromatin in vivo. Together with previous observations, these data provide further evidence for a role of mitotic histone H3 phosphorylation in blocking transcriptional programs or preserving the 'memory' PTMs. Mitotic protein exclusion can also have a role in depopulating the chromatin template for subsequent condensin loading. H3 phosphorylation thus serves as an integral step in the condensation of chromosome arms.

Source: Nucleus

DOI: 10.1080/19491034.2016.1276144

Authors: Karel H. M. van Wely, Carmen Mora Gallardo, Kendra R. Vann, Tatiana G. Kutateladze

Institutions: Consejo Superior de Investigaciones Científicas, Centro Nacional de Biotecnología, University of Colorado Anschutz

Language: English

Topic: Genomics and Chromatin Dynamics

Subfield: Molecular Biology

Field: Biochemistry, Genetics and Molecular Biology

Domain: Life Sciences

Open Access status: gold

Estimated APC paid: $1,993

Funder: National Institute of General Medical Sciences