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Biomedical subjects

Koki Matsumoto

Publications and source records attributed to Koki Matsumoto.

2 recordsLinked to original sources

ELYS associates with distinct DNA sequence environments during post-mitotic nuclear pore reassembly.

Nuclear pore complexes (NPCs) contribute to genome organization and cell identity, yet how post-mitotic NPC assembly is coordinated with chromatin architecture remains unclear. Here, we show that the nucleoporin ELYS preferentially associates with chromatin regions displaying distinct intrinsic DNA sequence features that are not explained by the repressive histone marks examined here. ELYS-bound regions are enriched for AT-rich sequences, whereas ELYS binding at super-enhancer-associated loci shift toward GC-rich sequence composition, revealing distinct sequence environments. These findings indicate that ELYS localization is associated with distinct intrinsic DNA sequence features and suggest a mechanism by which nuclear pore-associated architecture restores transcriptional programs after mitosis.

Journal Article

Super-enhancer trapping by the nuclear pore via intrinsically disordered regions of proteins in squamous cell carcinoma cells.

Master transcription factors such as TP63 establish super-enhancers (SEs) to drive core transcriptional networks in cancer cells, yet the spatiotemporal regulation of SEs within the nucleus remains unknown. The nuclear pore complex (NPC) may tether SEs to the nuclear pore where RNA export rates are maximal. Here, we report that NUP153, a component of the NPC, anchors SEs to the NPC and enhances TP63 expression by maximizing mRNA export. This anchoring is mediated through protein-protein interaction between the intrinsically disordered regions (IDRs) of NUP153 and the coactivator BRD4. Silencing of NUP153 excludes SEs from the nuclear periphery, decreases TP63 expression, impairs cellular growth, and induces epidermal differentiation of squamous cell carcinoma. Overall, this work reveals the critical roles of NUP153 IDRs in the regulation of SE localization, thus providing insights into a new layer of gene regulation at the epigenomic and spatial level.

Humans