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BRACTION

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Unraveling Brassinosteroid Biosynthesis: Orchestrating BR Precursor Movement via...

Unraveling Brassinosteroid Biosynthesis: Orchestrating BR Precursor Movement via Endoplasmic Reticulum-Plasma Membrane Contact Sites (EPCSs) Since their discovery in 1979, brassinosteroids (BRs) have been extensively studied for their biosynthesis and signalling pathways. Now, in the year 2023, one fundamental question remains: how do BRs move? As the only type of ster... ver más

30/04/2026

VLAAMS INSTITUUT...

176K€

Presupuesto del proyecto: 176K€

Líder del proyecto

VIB VZW No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Fecha límite participación Sin fecha límite de participación.

Financiación concedida El organismo HORIZON EUROPE notifico la concesión del proyecto el día 2024-04-10

HORIZON-MSCA-2023-PF-01-01: MSCA Postdoctoral Fellowships 2023 ExpectedOutcome:Project results are expected to contribute to the following outcomes:

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VLAAMS INSTITUUT BIOTECHNOL...

175.92K€ | Lider

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Duración del proyecto: 24 meses Fecha Inicio: 2024-04-10
Fecha Fin: 2026-04-30

Líder del proyecto

VIB VZW No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 176K€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto Since their discovery in 1979, brassinosteroids (BRs) have been extensively studied for their biosynthesis and signalling pathways. Now, in the year 2023, one fundamental question remains: how do BRs move? As the only type of steroidal phytohormones essential for plant growth and development, BRs act in a dose-dependent manner and do not travel long distances. Therefore, BR homeostasis is key to their function. Recent findings in my host lab revealed that in the Arabidopsis root the expression domains of BR biosynthetic enzymes are separated, and the completion of BR biosynthesis requires cell-to-cell movement of precursors, thus, revealing the importance of the short-distance transport for BR homeostasis maintenance. Further we revealed that plasmodesmata (PD) mediate the passage of BRs between neighbouring cells. However, we still do not know where in the cell BRs are synthesized and how these hydrophobic molecules are moving through PD. By searching interactors of BR biosynthetic enzymes, my host lab found interesting candidates associated with the endoplasmic reticulum (ER)-plasma membrane (PM) contact sites (EPCSs), including PD. EPCSs are known lipid synthesis platforms and contribute to PD function in plants. Here, I hypothesize that BRs are synthesized at EPCSs, and EPCSs coordinate BR biosynthesis and transport through PD. In BRACTION, I will combine live cell imaging with state-of-the-art imaging techniques to pinpoint BR biosynthesis sites in the cell. Combining advanced proteomics, genetics, and biochemistry, I aim to identify novel candidates that regulate BR biosynthesis and movement linked to EPCSs. Finally, I will employ genetics combined with bioorthogonal chemistry approach to assess candidate influence on BR symplastic movement. BRACTION's interdisciplinary approach will address knowledge gaps in BR homeostasis and drive major conceptual advances in understanding how BR levels are maintained across different cell types and tissues.

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