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August 14, 2025Open Access

Mechanistic and Epigenetic Partitioning of Lamina-Associated Chromatin Revealed by a Genome-Wide Imaging Screen

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Authors

PWPatrick J. WalshHigh Throughput Biology (United States)EKElizabeth B. KraeutlerRLRicardo Linares-SaldanaUniversity of Pennsylvania

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Overview

Genome-wide imaging identified hnRNPK as a critical regulator of LAD localization, indicating diverse mechanisms of chromatin organization.

Key Points

  • Loss of hnRNPK disrupts LAD positioning away from the nuclear periphery, leading to gene misexpression.
  • The study found over 100 essential genes for LAD localization, significantly enriched in RNA-binding proteins.
  • Assessment through a genome-wide imaging-based siRNA screen revealed distinct LAD classes marked by specific epigenetic modifications.
  • Understanding LAD mechanisms may provide insights into transcriptional regulation and genome stability in eukaryotic cells.

Cite This Study

Walsh et al. (2025) studied this question.

synapsesocial.com/papers/68af4965ad7bf08b1ead5d22https://doi.org/10.1101/2025.08.13.670143
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Distinct classes of lamina-associated domains are defined by differential patterns of repressive histone methylation2025
  2. 2Antagonism between H3K27me3 and genome–lamina association drives atypical spatial genome organization in the totipotent embryo2024 · 22 citations
  3. 3LBR and LAP2 mediate heterochromatin tethering to the nuclear periphery to preserve genome homeostasis2026 · 9 citations
  4. 4The nuclear periphery confers repression on H3K9me2-marked genes and transposons to shape cell fate2024 · 2 citations
  5. 5Chromatin protein complexes involved in gene repression in lamina-associated domains2024