Experimental testing of predicted myristoylation targets involved in asymmetric cell division and calcium-dependent signalling
2008
Evolutionary conservation of N-terminal N-myristoylation within protein families indicates significant functional impact of this lipid posttranslational modification for function. In the MYRbase study (Maurer-Stroh et al. (2004) Genome Biology 5, R21), protein families with relevance to asymmetric cell division in animals and the group of plant calcium-dependent protein kinases (CPKs) have surfaced with many predicted myristoylated members. Here, we describe experimental in vitro verification of predicted myristoylation and explore its impact on subcellular localization for these targets in vivo. Our results confirm that, indeed, Numb isoform A, Neuralized isoforms C and D from Drosophila melanogaster and two Neuralized-like homologues from Mus musculus have the capability for N-terminal myristoylation in vitro and in vivo (in fly tissue and in mouse 3T3 cells respectively) whereas other isoforms such as Neuralized A and B have not. The latter two cases are an example of different potential of various iso...
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