ArticleNature communications2025
HIRA defines early replication initiation zones independently of their genome compartment.
Article in Nature communications, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
1 citing paper in PubMed.
- Reconstitution of genome remodeling usingFrontiers in cell and developmental biology · 2026Review
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8 authors.
Funding
Abstract
Chromatin states and 3D architecture have been used as proxy to identify replication initiation zones (IZs) in mammalian cells, yet their functional interconnections remain a puzzle. Here, to dissect these relationships, we focus on the histone H3.3 chaperone HIRA recently implicated in early initiation zone (IZ) definition. We monitor 3D organisation, chromatin accessibility and histone post-translational modifications (PTMs) in wild-type and HIRA knock-out cells in parallel with early replication initiation. In the absence of HIRA, compartment A loses H3.3 enrichment and gains accessibility without changes in associated histone post-translational modifications (PTMs). Furthermore, impaired early firing at HIRA-dependent IZs does not correspond to changes in chromatin accessibility or patterns of histone H3 PTMs. Additionally, a small subset of early IZs initially in compartment A switch to B and lose early initiation in the absence of HIRA. Critically, HIRA complementation restores these early IZ, and H3.3 variant enrichment, without substantial compartment reversal. Thus, while HIRA contributes to compartment A features, its role in regulating early replication initiation can be uncoupled from accessibility, histone marks and compartment organisation.
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