Roedel, Amelie and Weig, Ina and Tiedemann, Sophie and Schwartz, Uwe and Laengst, Gernot and Moehle, Christoph and Grasser, Marion and Grasser, Klaus D. (2024) Arabidopsis mRNA export factor MOS11: molecular interactions and role in abiotic stress responses. NEW PHYTOLOGIST, 243 (1). pp. 180-194. ISSN 0028-646X, 1469-8137
Full text not available from this repository. (Request a copy)Abstract
Transcription and export (TREX) is a multi-subunit complex that links synthesis, processing and export of mRNAs. It interacts with the RNA helicase UAP56 and export factors such as MOS11 and ALYs to facilitate nucleocytosolic transport of mRNAs. Plant MOS11 is a conserved, but sparsely researched RNA-binding export factor, related to yeast Tho1 and mammalian CIP29/SARNP. Using biochemical approaches, the domains of Arabidopsis thaliana MOS11 required for interaction with UAP56 and RNA-binding were identified. Further analyses revealed marked genetic interactions between MOS11 and ALY genes. Cell fractionation in combination with transcript profiling demonstrated that MOS11 is required for export of a subset of mRNAs that are shorter and more GC-rich than MOS11-independent transcripts. The central alpha-helical domain of MOS11 proved essential for physical interaction with UAP56 and for RNA-binding. MOS11 is involved in the nucleocytosolic transport of mRNAs that are upregulated under stress conditions and accordingly mos11 mutant plants turned out to be sensitive to elevated NaCl concentrations and heat stress. Collectively, our analyses identify functional interaction domains of MOS11. In addition, the results establish that mRNA export is critically involved in the plant response to stress conditions and that MOS11 plays a prominent role at this.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | GENE-EXPRESSION; NUCLEAR-PORE; TREX; COMPLEX; TRANSCRIPTION; COMPONENT; HELICASES; PROTEINS; GROWTH; TOOLS; Arabidopsis thaliana; MOS11; mRNA export; nucleocytosolic transport; protein interactions; RNA-binding protein; TREX |
| Subjects: | 500 Science > 500 Natural sciences & mathematics 500 Science > 570 Life sciences 500 Science > 580 Botanical sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Pflanzenwissenschaften Biology, Preclinical Medicine > Institut für Pflanzenwissenschaften > Lehrstuhl für Zellbiologie und Pflanzenphysiologie (Prof. Dr. Klaus Grasser) Biology, Preclinical Medicine > Institut für Biochemie, Genetik und Mikrobiologie Biology, Preclinical Medicine > Institut für Biochemie, Genetik und Mikrobiologie > Lehrstuhl für Biochemie III > Prof. Dr. Gernot Längst |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 24 Jul 2025 12:23 |
| Last Modified: | 24 Jul 2025 12:23 |
| URI: | https://pred.uni-regensburg.de/id/eprint/63683 |
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