ArticleNucleic acids research2024
The zinc-finger protein Z4 cooperates with condensin II to regulate somatic chromosome pairing and 3D chromatin organization.
Article in Nucleic acids research, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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5 citing papers in PubMed, 9 citations in OpenAlex.
- Pioneer transcription factors direct tissue-specific cohesin chromatin entry and three-dimensional genome organization.Nature genetics · 2026Article
- The functional organization of chromosome territories in single nuclei during zygotic genome activation.Scientific reports · 2026Article
- Stress-induced loss of CTCF reveals an alternative, promoter-based mode of cohesin looping.bioRxiv : the preprint server for biology · 2025Article
- The length and strength of compartmental interactions are modulated by condensin II activity.PLoS genetics · 2025Article
- The functional organization of chromosome territories in single nuclei during zygotic genome activation.bioRxiv : the preprint server for biology · 2025Article
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14 authors at 3 institutions in 2 countries.
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Abstract
Chromosome pairing constitutes an important level of genome organization, yet the mechanisms that regulate pairing in somatic cells and the impact on 3D chromatin organization are still poorly understood. Here, we address these questions in Drosophila, an organism with robust somatic pairing. In Drosophila, pairing preferentially occurs at loci consisting of numerous architectural protein binding sites (APBSs), suggesting a role of architectural proteins (APs) in pairing regulation. Amongst these, the anti-pairing function of the condensin II subunit CAP-H2 is well established. However, the factors that regulate CAP-H2 localization and action at APBSs remain largely unknown. Here, we identify two factors that control CAP-H2 occupancy at APBSs and, therefore, regulate pairing. We show that Z4, interacts with CAP-H2 and is required for its localization at APBSs. We also show that hyperosmotic cellular stress induces fast and reversible unpairing in a Z4/CAP-H2 dependent manner. Moreover, by combining the opposite effects of Z4 depletion and osmostress, we show that pairing correlates with the strength of intrachromosomal 3D interactions, such as active (A) compartment interactions, intragenic gene-loops, and polycomb (Pc)-mediated chromatin loops. Altogether, our results reveal new players in CAP-H2-mediated pairing regulation and the intimate interplay between inter-chromosomal and intra-chromosomal 3D interactions.
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