Reference: Faustova I, et al. (2022) A synthetic biology approach reveals diverse and dynamic CDK response profiles via multisite phosphorylation of NLS-NES modules. Sci Adv 8(33):eabp8992

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Abstract


The complexity of multisite phosphorylation mechanisms in regulating nuclear localization signals (NLSs) and nuclear export signals (NESs) is not understood, and its potential has not been used in synthetic biology. The nucleocytoplasmic shuttling of many proteins is regulated by cyclin-dependent kinases (CDKs) that rely on multisite phosphorylation patterns and short linear motifs (SLiMs) to dynamically control proteins in the cell cycle. We studied the role of motif patterns in nucleocytoplasmic shuttling using sensors based on the CDK targets Dna2, Psy4, and Mcm2/3 of Saccharomyces cerevisiae. We designed multisite phosphorylation modules by rearranging phosphorylation sites, cyclin-specific SLiMs, phospho-priming, phosphatase specificity, and NLS/NES phospho-regulation and obtained very different substrate localization dynamics. These included ultrasensitive responses with and without a delay, graded responses, and different homeostatic plateaus. Thus, CDK can do much more than trigger sequential switches during the cell cycle as it can drive complex patterns of protein localization and activity by using multisite phosphorylation networks.

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Journal Article
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Faustova I, Örd M, Kiselev V, Fedorenko D, Borovko I, Macs D, Pääbo K, Lõoke M, Loog M
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