Related Experiment Video
Updated: May 15, 2026
09:32
Light-mediated Reversible Modulation of the Mitogen-activated Protein Kinase Pathway during Cell Differentiation and Xenopus Embryonic Development
Published on: June 15, 2017
An N-acetyltransferase-MAPK fusion protein modulates developmental reprogramming in Physcomitrium patens
Cloe de Luxán-Hernández1, Thomas J Ammitsøe1, Jakob V Kanne1,2
1Department of Biology, University of Copenhagen, Copenhagen, 2200, Denmark.
The New Phytologist
|May 14, 2026
Summary
Researchers discovered Rosetta NATD-MAPK 1 (RAK1), a moss protein integrating MAP kinase signaling and N-acetyltransferase activity. This protein regulates plant growth transitions and metabolic reprogramming through acetylation.
Area of Science:
- Plant biology
- Molecular biology
- Biochemistry
Background:
- Plant development involves complex signaling pathways.
- Post-translational modifications like acetylation regulate protein function.
- Mosses offer unique models for studying developmental transitions.
Purpose of the Study:
- To characterize a novel moss-specific protein, Rosetta NATD-MAPK 1 (RAK1).
- To elucidate RAK1's role in the 2D-to-3D growth transition in Physcomitrium patens.
- To understand the integration of MAP kinase signaling and N-acetyltransferase activity in RAK1.
Main Methods:
- Phenotypical analysis of Physcomitrium patens mutants.
- Biochemical assays to determine RAK1 enzymatic activity.
- Protein interaction studies to identify RAK1 binding partners.
Main Results:
- RAK1 integrates MAP kinase (MAPK)-dependent signaling with N-acetyltransferase activity.
- RAK1 regulates the 2D-to-3D growth transition in moss.
- RAK1 exhibits enhanced acetyltransferase activity upon MAPK domain activation and interacts with metabolic proteins.
Conclusions:
- RAK1 is a novel multidomain protein with a unique dual function.
- RAK1 plays a critical role in metabolic reprogramming during developmental transitions.
- This study provides insights into post-translational modifications governing plant development.
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