- Research news
Two-hybrid assay in plants
Genome Biology volume 2, Article number: spotlight-20010807-01 (2001)
In the August issue of Nature Biotechnology, Rajagopal Subramaniam and colleagues from the Université de Montreal describe a system for visualizing protein-protein interactions in living plant cells (Nature Biotechnology 2001, 19:769-772). Their technique is based on an in vivoprotein-fragment complementation assay in which protein interactions between fusion proteins induce folding and reassembly of fragments of the murine dihydrofolate reductase (DHFR) enzyme. Protein-protein interactions are monitored by the DHFR inhibitor fluorescein-conjugated methotrexate (fMTX). Subramaniam et al. used their assay to examine the interaction between Arabidopsis disease-resistance protein NPR1/NIM1 and the basic leucine-zipper protein TGA2. They show that salicylic acid induced NPR1-TGA2 interaction in tobacco or potato cells. This plant two-hybrid system should prove useful for the functional annotation of plant genomes.
Nature Biotechnology, [http://www.nature.com/nbt/]
Université de Montreal , [http://www.umontreal.ca]
Clonal selection and in vivo quantitation of protein interactions with protein-fragment complementation assays.
The Arabidopsis NPR1 gene that controls systemic acquired resistance encodes a novel protein containing ankyrin repeats