PreprintCited by 24Genomics and Chromatin DynamicsMicrotubule and mitosis dynamicsNuclear Structure and Function

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Condensin II activation by M18BP1

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Preprint — published as 10.1016/j.molcel.2025.06.014

Abstract

Condensin complexes promote the drastic spatial rearrangement of the genome upon mitotic entry. Condensin II initiates chromosome condensation in early mitosis. To prevent chromosome condensation during interphase, condensin II is inhibited by MCPH1, but the mechanism is unknown. Through genetic and proteomic approaches, we identify M18BP1, a protein previously associated with centromere identity, as a factor required for condensin II localization to chromatin. M18BP1 directly binds condensin II’s CAP-G2 subunit and competes with MCPH1 for binding. Upon mitotic entry, CDK1 mediated phosphorylation may promote a switch from MCPH1 to M18BP1 binding to activate condensin II. Our results identify a fundamental and evolutionarily conserved mechanism of condensin II activation.

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Metadata

Authors
Borsellini, A., Conti, D., Cutts, E., Harris, R. J., Walstein, K., Graziadei, A., Cecatiello, V., Aarts, T. F., Xie, R., Mazouzi, A., Sen, S., Hoencamp, C., Pleuger, R., Ghetti, S., Oberste-Lehn, L., Pan, D., Bange, T., Haarhuis, J. H. I., Perrakis, A., Brummelkamp, T. R., Rowland, B. D., Musacchio, A., & Vannini, A.
Affiliations
  • Human Technopole (IT)
  • Max Planck Institute of Molecular Physiology (DE)
  • University of Sheffield (GB)
  • The Netherlands Cancer Institute (NL)
Corresponding author
  • Cutts, Erin
  • Vannini, Alessandro
Venue
Molecular Cell
Publisher
openRxiv
Published
2024-05-03
Volume
85
Issue
14
Pages
2688-2700.e11
ISSN
1097-2765 (ISSN-L)
OpenAlex
W4412002214
Cited by
24
References
1
Citations by year
2026: 15 · 2025: 5 · 2024: 4
FWCI
5.98
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Molecular Cell (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • White Rose Research Online (University of Leeds, The University of Sheffield, University of York) (acceptedVersion)
  • Universitätsbibliographie, Universität Duisburg-Essen (submittedVersion)
Funders
  • European Molecular Biology Organization (ALTF 552-2022, ALTF 439-2019)
  • Wellcome Trust (200818/Z/16/Z)
  • Cancer Research UK
  • Deutsche Forschungsgemeinschaft
  • Nederlandse Organisatie voor Wetenschappelijk Onderzoek (VI.C.202.098)
  • Max-Planck-Gesellschaft
  • KWF Kankerbestrijding (12687, 15868)
  • HORIZON EUROPE European Research Council (951430)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Microtubule and mitosis dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nuclear Structure and Function
Keywords
condensin II, MCPH1, chromosome condensation, mitosis, centromere identity, condensin I, protein-protein interaction
MeSH terms
Adenosine Triphosphatases, Carrier Proteins, Chromatin, DNA-Binding Proteins, HeLa Cells, Humans, Interphase, Mitosis, Protein Binding, Cell Cycle Proteins, Multiprotein Complexes

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