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Detection of Protein Interactions in Plant using a Gateway Compatible Bimolecular Fluorescence Complementation (BiFC) System
Published on: September 16, 2011
Large scale interaction analysis predicts that the Gerbera hybrida floral E function is provided both by general and
Satu Ruokolainen1, Yan Peng Ng, Victor A Albert
1Gerbera Laboratory, Department of Applied Biology PO Box 27, Latokartanonkaari 7, FIN-00014 University of Helsinki, Finland.
BMC Plant Biology
|June 29, 2010
Summary
Gerbera MADS domain proteins show complex interactions, with GRCD4 and GRCD5 acting as general regulators. This reveals conserved and unique floral development mechanisms in Gerbera compared to other plants.
Area of Science:
- Plant developmental biology
- Molecular genetics
- Protein-protein interactions
Background:
- Gerbera hybrida exhibits complex inflorescences characteristic of the Asteraceae family.
- Previous studies identified MADS box genes regulating floral development in Gerbera.
- Investigating higher-order complex formation of these proteins is crucial for understanding floral development.
Purpose of the Study:
- To analyze protein-protein interactions of fourteen Gerbera MADS domain proteins using yeast two- and three-hybrid assays.
- To understand the behavior of Gerbera MADS domain proteins in higher-order complex formation according to the quartet model.
- To compare Gerbera MADS domain protein behavior with those in model plants like Arabidopsis.
Main Methods:
- Yeast two-hybrid analysis for pairwise protein interactions.
- Yeast three-hybrid analysis for ternary complex formation.
- Comparative analysis of Gerbera MADS domain proteins with homologous proteins in other species.
Main Results:
- Gerbera MADS domain proteins display varied interaction capacities, differing from other model plants.
- GRCD4 and GRCD5 proteins act as general E-function regulators, similar to Arabidopsis SEP proteins.
- GRCD1 shows a unique role as a whorl- and flower-type specific C-function partner, interacting with B-function proteins differently than other SEP-like proteins.
Conclusions:
- Gerbera MADS domain proteins exhibit both conserved and derived behaviors in complex formation.
- Protein interaction data aids in classifying Gerbera MADS domain proteins relative to Arabidopsis and Petunia.
- These findings, combined with genetic studies, reinforce gene roles in Gerbera floral development, highlighting increased complexity compared to simpler flowers.
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