Abstract
AbstractCalmodulin (CaM) is a major intracellular calcium receptor and probably the best studied member of the EF hand family of eukaryotic calcium-binding proteins. In contrast, much less is known about the related CaM-like proteins in animals and plants. We have previously characterized an embryonic phenotype of the single CaM gene cmd-1 from the nematode Caenorhabditis elegans. A previous functional high throughput study in C. elegans reported an embryonic lethal RNAi phenotype also for the related CaM-like gene cal-2. Based on these results we aimed to analyse the reported embryonic lethal cal-2 RNAi phenotype and compare it to that of the CaM cmd-1 embryo. Unfortunately, we were not able to find any visible RNAi phenotype for cal-2 as well as for the three remaining nematode cal genes cal-1, cal-3 and cal-4. However, because CaMs often have long cellular half-lives, we think that a definitive picture about the functionality of these genes will be established once corresponding mutant strains will be available. Immunofluorescence analyses revealed a significant expression of the CAL-2 and CAL-4 proteins in the body wall muscle indicating a possible functional redundancy of both these proteins in the C. elegans muscle.
Published Version
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