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Smart Scaffolds: How WD40 Proteins Integrate Plant Development, Metabolism, and Stress Adaptation
Chandan Roy1, Shuvobrata Majumder2, Salman Sahid3
1Department of Life Science, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati 517507, Andhra Pradesh, India.
Annals of Botany
|August 5, 2026
Summary
WD40 repeat proteins are essential plant scaffolds regulating growth and stress resilience. Their structural versatility enables complex interactions, crucial for crop improvement in a changing climate.
Area of Science:
- Plant Biology
- Molecular Biology
- Genetics
Background:
- WD40 repeat proteins are conserved molecular scaffolds utilizing tandem Trp-Asp motifs for stable beta-propeller structures.
- These proteins act as platforms for protein-protein and protein-DNA interactions, assembling multiprotein complexes.
- They integrate environmental and hormonal signals for physiological responses in plants.
Purpose of the Study:
- To review the structural properties, molecular mechanisms, and functional diversity of plant WD40 repeat proteins.
- To highlight their roles in plant development and stress adaptation.
- To underscore their potential for developing climate-resilient crops.
Main Methods:
- Review of existing literature on WD40 repeat proteins in plants.
- Analysis of their roles in developmental processes (e.g., anthocyanin biosynthesis, embryogenesis).
- Examination of their involvement in stress responses (abiotic/biotic) and hormone signaling pathways.
Main Results:
- WD40 proteins orchestrate diverse functions including development and stress resilience via complexes like MYB-bHLH-WD40 (MBW).
- They are critical for adapting to environmental stresses by regulating hormone interactions and protein degradation (SCF E3 ligases).
- Recent advances in genomics, interactomics, and structural modeling reveal their plasticity and conservation.
Conclusions:
- WD40 repeat proteins are pivotal regulators of plant growth, development, and stress tolerance.
- Their structural features and interaction capabilities make them key targets for crop improvement.
- Understanding WD40 proteins is crucial for developing high-yield, stress-resilient crops for future climates.
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