Forward Genetic Screen Using Transgenic Calcium Reporter Aequorin to Identify Novel Targets in Calcium Signaling
| Autor: | Jyothilakshmi Vadassery, Ramgopal Prajapati, Shruti Mishra, Deepika Mittal |
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| Rok vydání: | 2020 |
| Předmět: |
General Chemical Engineering
Transgene Mutant Population Arabidopsis Aequorin General Biochemistry Genetics and Molecular Biology Genes Reporter Calcium Signaling Genetic Testing Transgenes education Calcium signaling education.field_of_study General Immunology and Microbiology biology General Neuroscience Methane sulfonate Hydrogen Peroxide Plants Genetically Modified biology.organism_classification Cell biology Phenotype Mutagenesis Mutation Seeds Aequorea victoria biology.protein Calcium Genetic screen |
| Zdroj: | Journal of Visualized Experiments. |
| ISSN: | 1940-087X |
| DOI: | 10.3791/61259 |
| Popis: | Forward genetic screens have been important tools in the unbiased identification of genetic components involved in several biological pathways. The basis of the screen is to generate a mutant population that can be screened with a phenotype of interest. EMS (ethyl methane sulfonate) is a commonly used alkylating agent for inducing random mutation in a classical forward genetic screen to identify multiple genes involved in any given process. Cytosolic calcium (Ca2+) elevation is a key early signaling pathway that is activated upon stress perception. However the identity of receptors, channels, pumps and transporters of Ca2+ is still elusive in many study systems. Aequorin is a cellular calcium reporter protein isolated from Aequorea victoria and stably expressed in Arabidopsis. Exploiting this, we designed a forward genetic screen in which we EMS-mutagenized the aequorin transgenic. The seeds from the mutant plants were collected (M1) and screening for the phenotype of interest was carried out in the segregating (M2) population. Using a 96-well high-throughput Ca2+ measurement protocol, several novel mutants can be identified that have a varying calcium response and are measured in real time. The mutants with the phenotype of interest are rescued and propagated till a homozygous mutant plant population is obtained. This protocol provides a method for forward genetic screens in Ca2+ reporter background and identify novel Ca2+ regulated targets. |
| Databáze: | OpenAIRE |
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