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| Pàgina inicial > Articles > Articles publicats > Nucleo-cytoplasmic distribution of SAP18 reveals its dual function in splicing regulation and heat-stress response in Arabidopsis |
| Data: | 2025 |
| Resum: | Dynamic shuttling of proteins between the nucleus and cytoplasm orchestrates vital functions in eukaryotes. Here, we reveal the multifaceted functions of Arabidopsis Sin3-associated protein 18 kDa (SAP18) in the regulation of development and heat-stress tolerance. Proteomic analysis demonstrated that SAP18 is a core component of the nuclear apoptosis- and splicing-associated protein (ASAP) complex in Arabidopsis, contributing to the precise splicing of genes associated with leaf development. Genetic analysis further confirmed the critical role of SAP18 in different developmental processes as part of the ASAP complex, including leaf morphogenesis and flowering time. Interestingly, upon heat shock, SAP18 translocates from the nucleus to cytoplasmic stress granules and processing bodies. The heat-sensitive phenotype of a SAP18 loss-of-function mutant revealed a novel role for SAP18 in plant thermoprotection. These findings significantly expand our understanding of the relevance of SAP18 for plant growth, linking nuclear splicing with cytoplasmic stress responses and providing new perspectives for future exploration of plant thermotolerance mechanisms. |
| Ajuts: | "la Caixa" Foundation 100010434 Agencia Estatal de Investigación PID2019-110510GA-I00 Agencia Estatal de Investigación EUR2021-122003 Agencia Estatal de Investigación CNS2023-145632 Agencia Estatal de Investigación PID2021-125223NA-I00 Agencia Estatal de Investigación CEX2019-000902-S Agencia Estatal de Investigación RYC2021-032539-I Agencia Estatal de Investigación RYC2020-030160-I Generalitat de Catalunya 2021/SGR-00873 European Commission 101043370 European Commission 945043 European Commission 847548 |
| Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. |
| Llengua: | Anglès |
| Document: | Article ; recerca ; Versió publicada |
| Matèria: | ASAP complex ; Plant development ; Alternative splicing ; Heat stress ; Arabidopsis thaliana ; Biomolecular condensates ; Leaf development ; Thermoprotection ; Stress granules ; Shuttling proteins |
| Publicat a: | Plant Communications, Vol. 6, Num. 1 (January 2025) , art. 101180, ISSN 2590-3462 |
16 p, 3.8 MB |