CTCF/RAD21 organize the ground state of chromatin-nuclear speckle association.

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Tác giả: Katherine A Alexander, Shelley L Berger, Zachary Gardner, Rajan Jain, Eric F Joyce, Ian D Krantz, Brian B Liau, Son C Nguyen, Shelby Roseman, Allison P Siegenfeld, Khoa A Tran, Ruofan Yu

Ngôn ngữ: eng

Ký hiệu phân loại: 781.649 +Rap

Thông tin xuất bản: United States : Nature structural & molecular biology , 2025

Mô tả vật lý:

Bộ sưu tập: NCBI

ID: 494409

Recent findings indicate that nuclear speckles, a distinct type of nuclear body, interact with certain chromatin regions in a ground state. Here, we report that the chromatin structural factors CTCF and cohesin are required for full ground-state association between DNA and nuclear speckles. We identified a putative speckle-targeting motif (STM) within cohesin subunit RAD21 and demonstrated that the STM is required for chromatin-nuclear speckle association, disruption of which also impaired induction of speckle-associated genes. Depletion of the cohesin-releasing factor WAPL, which stabilizes cohesin on chromatin, resulted in reinforcement of DNA-speckle contacts and enhanced inducibility of speckle-associated genes. Additionally, we observed disruption of chromatin-nuclear speckle association in patient-derived cells with Cornelia de Lange syndrome, a congenital neurodevelopmental disorder involving defective cohesin pathways. In summary, our findings reveal a mechanism for establishing the ground state of chromatin-speckle association and promoting gene inducibility, with relevance to human disease.
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