title: Epigenetic countermarks in mitotic chromosome condensation.
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.
authors.affiliation: a Department of Immunology and Oncology , Centro Nacional de Biotecnología/CSIC , Madrid , Spain.
authors.forename: Karel H M
authors.initials: KH
authors.lastname: van Wely
authors.affiliation: a Department of Immunology and Oncology , Centro Nacional de Biotecnología/CSIC , Madrid , Spain.
authors.forename: Carmen
authors.initials: C
authors.lastname: Mora Gallardo
authors.affiliation: b Department of Pharmacology , University of Colorado School of Medicine , Aurora , CO , USA.
authors.forename: Kendra R
authors.initials: KR
authors.lastname: Vann
authors.affiliation: b Department of Pharmacology , University of Colorado School of Medicine , Aurora , CO , USA.
authors.forename: Tatiana G
authors.initials: TG
authors.lastname: Kutateladze
mesh_terms: D002843:Chromatin / Q000737:chemistry / Q000378:metabolism; D020090:Chromosome Segregation / Q000235:genetics*; D044127:Epigenesis, Genetic; D006801:Humans; D008938:Mitosis / Q000235:genetics*
chemical_list: D002843:Chromatin
keywords: Aurora B; Haspin; chromatin condensation; epigenetics; histone; histone reader; mitosis; phoshpo/methyl switch