The Cyclin Dependent Kinase G group defines a thermo-sensitive alternative splicing circuit modulating the expression of Arabidopsis ATU2AF65A

N. Cavallari, C. Nibau, A. Fuchs, D. Dadarou, A. Barta, J. Doonan, The Plant Journal 94 (2018) 1010–1022.

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Journal Article | Published | English
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Abstract
The ability to adapt growth and development to temperature variations is crucial to generate plant varieties resilient to predicted temperature changes. However, the mechanisms underlying plant response to progressive increases in temperature have just started to be elucidated. Here, we report that the Cyclin-dependent Kinase G1 (CDKG1) is a central element in a thermo-sensitive mRNA splicing cascade that transduces changes in ambient temperature into differential expression of the fundamental spliceosome component, ATU2AF65A. CDKG1 is alternatively spliced in a temperature-dependent manner. We found that this process is partly dependent on both the Cyclin-dependent Kinase G2 (CDKG2) and the interacting co-factor CYCLIN L1 resulting in two distinct messenger RNAs. Relative abundance of both CDKG1 transcripts correlates with ambient temperature and possibly with different expression levels of the associated protein isoforms. Both CDKG1 alternative transcripts are necessary to fully complement the expression of ATU2AF65A across the temperature range. Our data support a previously unidentified temperature-dependent mechanism based on the alternative splicing of CDKG1 and regulated by CDKG2 and CYCLIN L1. We propose that changes in ambient temperature affect the relative abundance of CDKG1 transcripts and this in turn translates into differential CDKG1 protein expression coordinating the alternative splicing of ATU2AF65A. This article is protected by copyright. All rights reserved.
Publishing Year
Date Published
2018-06-06
Journal Title
The Plant Journal
Acknowledgement
NC was funded by the VIPS Program of the Austrian Federal Ministry of Science and Research and the City of Vienna.
Volume
94
Issue
6
Page
1010 - 1022
IST-REx-ID

Cite this

Cavallari N, Nibau C, Fuchs A, Dadarou D, Barta A, Doonan J. The Cyclin Dependent Kinase G group defines a thermo-sensitive alternative splicing circuit modulating the expression of Arabidopsis ATU2AF65A. The Plant Journal. 2018;94(6):1010-1022. doi:10.1111/tpj.13914
Cavallari, N., Nibau, C., Fuchs, A., Dadarou, D., Barta, A., & Doonan, J. (2018). The Cyclin Dependent Kinase G group defines a thermo-sensitive alternative splicing circuit modulating the expression of Arabidopsis ATU2AF65A. The Plant Journal, 94(6), 1010–1022. https://doi.org/10.1111/tpj.13914
Cavallari, Nicola, Candida Nibau, Armin Fuchs, Despoina Dadarou, Andrea Barta, and John Doonan. “The Cyclin Dependent Kinase G Group Defines a Thermo-Sensitive Alternative Splicing Circuit Modulating the Expression of Arabidopsis ATU2AF65A.” The Plant Journal 94, no. 6 (2018): 1010–22. https://doi.org/10.1111/tpj.13914.
N. Cavallari, C. Nibau, A. Fuchs, D. Dadarou, A. Barta, and J. Doonan, “The Cyclin Dependent Kinase G group defines a thermo-sensitive alternative splicing circuit modulating the expression of Arabidopsis ATU2AF65A,” The Plant Journal, vol. 94, no. 6, pp. 1010–1022, 2018.
Cavallari N, Nibau C, Fuchs A, Dadarou D, Barta A, Doonan J. 2018. The Cyclin Dependent Kinase G group defines a thermo-sensitive alternative splicing circuit modulating the expression of Arabidopsis ATU2AF65A. The Plant Journal. 94(6), 1010–1022.
Cavallari, Nicola, et al. “The Cyclin Dependent Kinase G Group Defines a Thermo-Sensitive Alternative Splicing Circuit Modulating the Expression of Arabidopsis ATU2AF65A.” The Plant Journal, vol. 94, no. 6, Wiley, 2018, pp. 1010–22, doi:10.1111/tpj.13914.
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